Merge branch 'feature/indent-change' into dev

13 files changed, 6392 insertions, 6392 deletions

diff --git a/packages/session-orchestrator/package.json b/packages/session-orchestrator/package.json
index 40cc0fe..ba34c4d 100644
--- a/packages/session-orchestrator/package.json
+++ b/packages/session-orchestrator/package.json
@@ -1,15 +1,15 @@
 {
-	"name": "@dispatch/session-orchestrator",
-	"version": "0.0.0",
-	"type": "module",
-	"private": true,
-	"main": "dist/index.js",
-	"types": "dist/index.d.ts",
-	"dependencies": {
-		"@dispatch/kernel": "workspace:*",
-		"@dispatch/conversation-store": "workspace:*",
-		"@dispatch/credential-store": "workspace:*",
-		"@dispatch/message-queue": "workspace:*",
-		"@dispatch/system-prompt": "workspace:*"
-	}
+  "name": "@dispatch/session-orchestrator",
+  "version": "0.0.0",
+  "type": "module",
+  "private": true,
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "dependencies": {
+    "@dispatch/kernel": "workspace:*",
+    "@dispatch/conversation-store": "workspace:*",
+    "@dispatch/credential-store": "workspace:*",
+    "@dispatch/message-queue": "workspace:*",
+    "@dispatch/system-prompt": "workspace:*"
+  }
 }
diff --git a/packages/session-orchestrator/src/extension.ts b/packages/session-orchestrator/src/extension.ts
index 1a57cc3..5afffd8 100644
--- a/packages/session-orchestrator/src/extension.ts
+++ b/packages/session-orchestrator/src/extension.ts
@@ -5,169 +5,169 @@ import { runTurn } from "@dispatch/kernel";
 import { messageQueueHandle } from "@dispatch/message-queue";
 import { systemPromptHandle } from "@dispatch/system-prompt";
 import {
-	cacheWarmHandle,
-	compactionHandle,
-	createCompactionService,
-	createSessionOrchestrator,
-	createWarmService,
-	sessionOrchestratorHandle,
+  cacheWarmHandle,
+  compactionHandle,
+  createCompactionService,
+  createSessionOrchestrator,
+  createWarmService,
+  sessionOrchestratorHandle,
 } from "./orchestrator.js";
 import { selectFirstProvider } from "./pure.js";
 import { filterRemoteIncompatibleTools, toolsFilter } from "./tools-filter.js";
 
 export const manifest: Manifest = {
-	id: "session-orchestrator",
-	name: "Session Orchestrator",
-	version: "0.0.0",
-	apiVersion: "^0.1.0",
-	trust: "bundled",
-	dependsOn: ["conversation-store", "credential-store"],
-	activation: "eager",
-	contributes: {
-		services: [
-			"session-orchestrator/orchestrator",
-			"session-orchestrator/warm",
-			"session-orchestrator/compaction",
-		],
-		hooks: [
-			"session-orchestrator/turn-started",
-			"session-orchestrator/turn-settled",
-			"session-orchestrator/warm-completed",
-			"session-orchestrator/conversation-closed",
-			"session-orchestrator/conversation-status-changed",
-			"session-orchestrator/conversation-compacted",
-		],
-	},
+  id: "session-orchestrator",
+  name: "Session Orchestrator",
+  version: "0.0.0",
+  apiVersion: "^0.1.0",
+  trust: "bundled",
+  dependsOn: ["conversation-store", "credential-store"],
+  activation: "eager",
+  contributes: {
+    services: [
+      "session-orchestrator/orchestrator",
+      "session-orchestrator/warm",
+      "session-orchestrator/compaction",
+    ],
+    hooks: [
+      "session-orchestrator/turn-started",
+      "session-orchestrator/turn-settled",
+      "session-orchestrator/warm-completed",
+      "session-orchestrator/conversation-closed",
+      "session-orchestrator/conversation-status-changed",
+      "session-orchestrator/conversation-compacted",
+    ],
+  },
 };
 
 export function activate(host: HostAPI): void {
-	const conversationStore = host.getService(conversationStoreHandle);
+  const conversationStore = host.getService(conversationStoreHandle);
 
-	const { orchestrator, activeConversations } = createSessionOrchestrator({
-		conversationStore,
-		resolveProvider: () => selectFirstProvider(host.getProviders()),
-		resolveTools: () => [...host.getTools().values()],
-		resolveModel: (modelName: string) => {
-			const store = host.getService(credentialStoreHandle);
-			const r = store.resolve(modelName);
-			if (r === undefined) return undefined;
-			const provider = host.getProviders().get(r.providerId);
-			return provider ? { provider, model: r.model } : undefined;
-		},
-		resolveModelInfo: async (modelName: string) => {
-			const store = host.getService(credentialStoreHandle);
-			return store.getModelInfo(modelName);
-		},
-		applyToolsFilter: (assembly) => host.applyFilters(toolsFilter, assembly),
-		runTurn,
-		logger: host.logger,
-		now: () => Date.now(),
-		emit: (hook, payload) => host.emit(hook, payload),
-		resolveQueue: () => {
-			// Lazily resolve the message-queue service. Returns undefined when the
-			// extension isn't loaded (feature degrades off) — checked via the
-			// activated-manifests list so `host.getService` is only called when the
-			// service is registered. Lazy so activation order with message-queue
-			// doesn't matter; called per-turn / per-enqueue, not at activate time.
-			const loaded = host.getExtensions().some((m) => m.id === "message-queue");
-			return loaded ? host.getService(messageQueueHandle) : undefined;
-		},
-		resolveCompaction: () => {
-			// Lazily resolve the compaction service (registered below after
-			// the orchestrator). By the time this is called at runtime
-			// (after a turn settles), the service is registered.
-			try {
-				return host.getService(compactionHandle);
-			} catch {
-				return undefined;
-			}
-		},
-		resolveSystemPrompt: () => {
-			// Lazily resolve the system-prompt service. Returns undefined when
-			// the system-prompt extension isn't loaded (no system prompt sent —
-			// current behavior). Lazy so activation order with system-prompt
-			// doesn't matter; called per-turn / per-compaction, not at activate.
-			try {
-				return host.getService(systemPromptHandle);
-			} catch {
-				return undefined;
-			}
-		},
-	});
+  const { orchestrator, activeConversations } = createSessionOrchestrator({
+    conversationStore,
+    resolveProvider: () => selectFirstProvider(host.getProviders()),
+    resolveTools: () => [...host.getTools().values()],
+    resolveModel: (modelName: string) => {
+      const store = host.getService(credentialStoreHandle);
+      const r = store.resolve(modelName);
+      if (r === undefined) return undefined;
+      const provider = host.getProviders().get(r.providerId);
+      return provider ? { provider, model: r.model } : undefined;
+    },
+    resolveModelInfo: async (modelName: string) => {
+      const store = host.getService(credentialStoreHandle);
+      return store.getModelInfo(modelName);
+    },
+    applyToolsFilter: (assembly) => host.applyFilters(toolsFilter, assembly),
+    runTurn,
+    logger: host.logger,
+    now: () => Date.now(),
+    emit: (hook, payload) => host.emit(hook, payload),
+    resolveQueue: () => {
+      // Lazily resolve the message-queue service. Returns undefined when the
+      // extension isn't loaded (feature degrades off) — checked via the
+      // activated-manifests list so `host.getService` is only called when the
+      // service is registered. Lazy so activation order with message-queue
+      // doesn't matter; called per-turn / per-enqueue, not at activate time.
+      const loaded = host.getExtensions().some((m) => m.id === "message-queue");
+      return loaded ? host.getService(messageQueueHandle) : undefined;
+    },
+    resolveCompaction: () => {
+      // Lazily resolve the compaction service (registered below after
+      // the orchestrator). By the time this is called at runtime
+      // (after a turn settles), the service is registered.
+      try {
+        return host.getService(compactionHandle);
+      } catch {
+        return undefined;
+      }
+    },
+    resolveSystemPrompt: () => {
+      // Lazily resolve the system-prompt service. Returns undefined when
+      // the system-prompt extension isn't loaded (no system prompt sent —
+      // current behavior). Lazy so activation order with system-prompt
+      // doesn't matter; called per-turn / per-compaction, not at activate.
+      try {
+        return host.getService(systemPromptHandle);
+      } catch {
+        return undefined;
+      }
+    },
+  });
 
-	host.provideService(sessionOrchestratorHandle, orchestrator);
+  host.provideService(sessionOrchestratorHandle, orchestrator);
 
-	// Remote-degradation rule (plan §6): when a turn is REMOTE
-	// (`assembly.computerId !== undefined`), drop tools that spawn local
-	// processes and cannot run over SFTP — the `lsp` tool (local LSP servers)
-	// and MCP-namespaced tools (`<serverId>__<toolName>`, local MCP servers).
-	// When LOCAL (`computerId === undefined`), the filter is a passthrough —
-	// byte-identical to today. Registered at default priority (0) with
-	// activation-order tie-breaking: session-orchestrator activates before
-	// MCP (which dependsOn it), so this runs FIRST in the chain — the drops
-	// happen before MCP's filter connects/registers servers. Mirrors how MCP
-	// adds its own filter via host.addFilter.
-	host.addFilter(toolsFilter, filterRemoteIncompatibleTools);
+  // Remote-degradation rule (plan §6): when a turn is REMOTE
+  // (`assembly.computerId !== undefined`), drop tools that spawn local
+  // processes and cannot run over SFTP — the `lsp` tool (local LSP servers)
+  // and MCP-namespaced tools (`<serverId>__<toolName>`, local MCP servers).
+  // When LOCAL (`computerId === undefined`), the filter is a passthrough —
+  // byte-identical to today. Registered at default priority (0) with
+  // activation-order tie-breaking: session-orchestrator activates before
+  // MCP (which dependsOn it), so this runs FIRST in the chain — the drops
+  // happen before MCP's filter connects/registers servers. Mirrors how MCP
+  // adds its own filter via host.addFilter.
+  host.addFilter(toolsFilter, filterRemoteIncompatibleTools);
 
-	const warmService = createWarmService(
-		{
-			conversationStore,
-			resolveProvider: () => selectFirstProvider(host.getProviders()),
-			resolveTools: () => [...host.getTools().values()],
-			resolveModel: (modelName: string) => {
-				const store = host.getService(credentialStoreHandle);
-				const r = store.resolve(modelName);
-				if (r === undefined) return undefined;
-				const provider = host.getProviders().get(r.providerId);
-				return provider ? { provider, model: r.model } : undefined;
-			},
-			applyToolsFilter: (assembly) => host.applyFilters(toolsFilter, assembly),
-			runTurn,
-			logger: host.logger,
-			now: () => Date.now(),
-			emit: (hook, payload) => host.emit(hook, payload),
-		},
-		activeConversations,
-	);
+  const warmService = createWarmService(
+    {
+      conversationStore,
+      resolveProvider: () => selectFirstProvider(host.getProviders()),
+      resolveTools: () => [...host.getTools().values()],
+      resolveModel: (modelName: string) => {
+        const store = host.getService(credentialStoreHandle);
+        const r = store.resolve(modelName);
+        if (r === undefined) return undefined;
+        const provider = host.getProviders().get(r.providerId);
+        return provider ? { provider, model: r.model } : undefined;
+      },
+      applyToolsFilter: (assembly) => host.applyFilters(toolsFilter, assembly),
+      runTurn,
+      logger: host.logger,
+      now: () => Date.now(),
+      emit: (hook, payload) => host.emit(hook, payload),
+    },
+    activeConversations,
+  );
 
-	host.provideService(cacheWarmHandle, warmService);
+  host.provideService(cacheWarmHandle, warmService);
 
-	const compactionService = createCompactionService(
-		{
-			conversationStore,
-			resolveProvider: () => selectFirstProvider(host.getProviders()),
-			resolveTools: () => [...host.getTools().values()],
-			resolveModel: (modelName: string) => {
-				const store = host.getService(credentialStoreHandle);
-				const r = store.resolve(modelName);
-				if (r === undefined) return undefined;
-				const provider = host.getProviders().get(r.providerId);
-				return provider ? { provider, model: r.model } : undefined;
-			},
-			resolveModelInfo: async (modelName: string) => {
-				const store = host.getService(credentialStoreHandle);
-				return store.getModelInfo(modelName);
-			},
-			resolveSystemPrompt: () => {
-				try {
-					return host.getService(systemPromptHandle);
-				} catch {
-					return undefined;
-				}
-			},
-			applyToolsFilter: (assembly) => host.applyFilters(toolsFilter, assembly),
-			runTurn,
-			logger: host.logger,
-			now: () => Date.now(),
-			emit: (hook, payload) => host.emit(hook, payload),
-		},
-		activeConversations,
-	);
+  const compactionService = createCompactionService(
+    {
+      conversationStore,
+      resolveProvider: () => selectFirstProvider(host.getProviders()),
+      resolveTools: () => [...host.getTools().values()],
+      resolveModel: (modelName: string) => {
+        const store = host.getService(credentialStoreHandle);
+        const r = store.resolve(modelName);
+        if (r === undefined) return undefined;
+        const provider = host.getProviders().get(r.providerId);
+        return provider ? { provider, model: r.model } : undefined;
+      },
+      resolveModelInfo: async (modelName: string) => {
+        const store = host.getService(credentialStoreHandle);
+        return store.getModelInfo(modelName);
+      },
+      resolveSystemPrompt: () => {
+        try {
+          return host.getService(systemPromptHandle);
+        } catch {
+          return undefined;
+        }
+      },
+      applyToolsFilter: (assembly) => host.applyFilters(toolsFilter, assembly),
+      runTurn,
+      logger: host.logger,
+      now: () => Date.now(),
+      emit: (hook, payload) => host.emit(hook, payload),
+    },
+    activeConversations,
+  );
 
-	host.provideService(compactionHandle, compactionService);
+  host.provideService(compactionHandle, compactionService);
 }
 
 export const extension: Extension = {
-	manifest,
-	activate,
+  manifest,
+  activate,
 };
diff --git a/packages/session-orchestrator/src/index.ts b/packages/session-orchestrator/src/index.ts
index aaafb76..cc41fa8 100644
--- a/packages/session-orchestrator/src/index.ts
+++ b/packages/session-orchestrator/src/index.ts
@@ -1,48 +1,48 @@
 export { extension, manifest } from "./extension.js";
 export {
-	type CompactionService,
-	type ConversationClosedPayload,
-	type ConversationCompactedPayload,
-	type ConversationOpenedPayload,
-	type ConversationStatusChangedPayload,
-	cacheWarmHandle,
-	compactionHandle,
-	conversationClosed,
-	conversationCompacted,
-	conversationOpened,
-	conversationStatusChanged,
-	createCompactionService,
-	createRetryStrategy,
-	createSessionOrchestrator,
-	createWarmService,
-	type EnqueueInput,
-	type EnqueueResult,
-	type SessionOrchestrator,
-	type SessionOrchestratorBundle,
-	type SessionOrchestratorDeps,
-	type StartTurnInput,
-	type StartTurnResult,
-	sessionOrchestratorHandle,
-	type TurnEventListener,
-	type TurnLifecyclePayload,
-	turnSettled,
-	turnStarted,
-	type WarmCompletedPayload,
-	type WarmResult,
-	type WarmService,
-	type WarmServiceDeps,
-	warmCompleted,
+  type CompactionService,
+  type ConversationClosedPayload,
+  type ConversationCompactedPayload,
+  type ConversationOpenedPayload,
+  type ConversationStatusChangedPayload,
+  cacheWarmHandle,
+  compactionHandle,
+  conversationClosed,
+  conversationCompacted,
+  conversationOpened,
+  conversationStatusChanged,
+  createCompactionService,
+  createRetryStrategy,
+  createSessionOrchestrator,
+  createWarmService,
+  type EnqueueInput,
+  type EnqueueResult,
+  type SessionOrchestrator,
+  type SessionOrchestratorBundle,
+  type SessionOrchestratorDeps,
+  type StartTurnInput,
+  type StartTurnResult,
+  sessionOrchestratorHandle,
+  type TurnEventListener,
+  type TurnLifecyclePayload,
+  turnSettled,
+  turnStarted,
+  type WarmCompletedPayload,
+  type WarmResult,
+  type WarmService,
+  type WarmServiceDeps,
+  warmCompleted,
 } from "./orchestrator.js";
 export {
-	buildUserMessage,
-	cumulativeSleepMs,
-	defaultDispatchPolicy,
-	delayFor,
-	generateTurnId,
-	RETRY_BUDGET_MS,
-	RETRY_SCHEDULE_MS,
-	RETRY_TAIL_MS,
-	resolveReasoningEffort,
-	selectFirstProvider,
+  buildUserMessage,
+  cumulativeSleepMs,
+  defaultDispatchPolicy,
+  delayFor,
+  generateTurnId,
+  RETRY_BUDGET_MS,
+  RETRY_SCHEDULE_MS,
+  RETRY_TAIL_MS,
+  resolveReasoningEffort,
+  selectFirstProvider,
 } from "./pure.js";
 export { type ToolAssembly, toolsFilter } from "./tools-filter.js";
diff --git a/packages/session-orchestrator/src/metrics.test.ts b/packages/session-orchestrator/src/metrics.test.ts
index 1920fc0..2ecaae8 100644
--- a/packages/session-orchestrator/src/metrics.test.ts
+++ b/packages/session-orchestrator/src/metrics.test.ts
@@ -3,367 +3,367 @@ import { describe, expect, it } from "vitest";
 import { createMetricsAccumulator } from "./metrics.js";
 
 function stepId(id: string): StepId {
-	return id as StepId;
+  return id as StepId;
 }
 
 describe("createMetricsAccumulator", () => {
-	it("builds a TurnMetrics from a single-step turn", () => {
-		const acc = createMetricsAccumulator();
-
-		const usageEvent: AgentEvent = {
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		};
-		const stepCompleteEvent: AgentEvent = {
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			ttftMs: 50,
-			decodeMs: 150,
-			genTotalMs: 200,
-		};
-		const doneEvent: AgentEvent = {
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-			durationMs: 500,
-			usage: { inputTokens: 10, outputTokens: 5 },
-		};
-
-		acc.ingest(usageEvent);
-		acc.ingest(stepCompleteEvent);
-		acc.ingest(doneEvent);
-
-		const tm = acc.build("t1");
-		expect(tm.turnId).toBe("t1");
-		expect(tm.usage.inputTokens).toBe(10);
-		expect(tm.usage.outputTokens).toBe(5);
-		expect(tm.durationMs).toBe(500);
-		expect(tm.steps).toHaveLength(1);
-		expect(tm.steps[0]?.stepId).toBe(stepId("t1#0"));
-		expect(tm.steps[0]?.usage.inputTokens).toBe(10);
-		expect(tm.steps[0]?.usage.outputTokens).toBe(5);
-		expect(tm.steps[0]?.ttftMs).toBe(50);
-		expect(tm.steps[0]?.decodeMs).toBe(150);
-		expect(tm.steps[0]?.genTotalMs).toBe(200);
-	});
-
-	it("aggregates multi-step usage and preserves step order", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			genTotalMs: 100,
-		});
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#1"),
-			usage: { inputTokens: 20, outputTokens: 10 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#1"),
-			genTotalMs: 150,
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-			usage: { inputTokens: 30, outputTokens: 15 },
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.steps).toHaveLength(2);
-		expect(tm.steps[0]?.stepId).toBe(stepId("t1#0"));
-		expect(tm.steps[0]?.usage.inputTokens).toBe(10);
-		expect(tm.steps[1]?.stepId).toBe(stepId("t1#1"));
-		expect(tm.steps[1]?.usage.inputTokens).toBe(20);
-		expect(tm.usage.inputTokens).toBe(30);
-		expect(tm.usage.outputTokens).toBe(15);
-	});
-
-	it("joins per-step timing and usage by stepId", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			ttftMs: 50,
-			decodeMs: 100,
-			genTotalMs: 150,
-		});
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.steps).toHaveLength(1);
-		expect(tm.steps[0]?.usage.inputTokens).toBe(10);
-		expect(tm.steps[0]?.ttftMs).toBe(50);
-		expect(tm.steps[0]?.decodeMs).toBe(100);
-		expect(tm.steps[0]?.genTotalMs).toBe(150);
-	});
-
-	it("turn-level usage comes from done event, not step sum", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-			usage: { inputTokens: 100, outputTokens: 50 },
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.usage.inputTokens).toBe(100);
-		expect(tm.usage.outputTokens).toBe(50);
-	});
-
-	it("falls back to summing step usage when done.usage is absent", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.usage.inputTokens).toBe(10);
-		expect(tm.usage.outputTokens).toBe(5);
-	});
-
-	it("tolerates missing usage on a step (timing only)", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			genTotalMs: 200,
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.steps).toHaveLength(1);
-		expect(tm.steps[0]?.usage.inputTokens).toBe(0);
-		expect(tm.steps[0]?.usage.outputTokens).toBe(0);
-		expect(tm.steps[0]?.genTotalMs).toBe(200);
-	});
-
-	it("tolerates missing timing on a step (usage only)", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.steps).toHaveLength(1);
-		expect(tm.steps[0]?.usage.inputTokens).toBe(10);
-		expect(tm.steps[0]?.ttftMs).toBeUndefined();
-		expect(tm.steps[0]?.decodeMs).toBeUndefined();
-		expect(tm.steps[0]?.genTotalMs).toBeUndefined();
-	});
-
-	it("reset clears all accumulated state", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-
-		acc.reset();
-
-		const tm = acc.build("t2");
-		expect(tm.steps).toHaveLength(0);
-		expect(tm.usage.inputTokens).toBe(0);
-		expect(tm.usage.outputTokens).toBe(0);
-	});
-
-	it("contextSize equals inputTokens + outputTokens for a single-step turn", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.contextSize).toBe(15);
-	});
-
-	it("contextSize equals ONLY the last step's inputTokens + outputTokens for a multi-step turn", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			usage: { inputTokens: 10, outputTokens: 5 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-		});
-		acc.ingest({
-			type: "usage",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#1"),
-			usage: { inputTokens: 20, outputTokens: 10 },
-		});
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#1"),
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-			usage: { inputTokens: 100, outputTokens: 50 },
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.contextSize).toBe(30);
-		expect(tm.contextSize).not.toBe(tm.usage.inputTokens);
-	});
-
-	it("contextSize is undefined when the turn has no steps", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.contextSize).toBeUndefined();
-	});
-
-	it("contextSize is undefined when the last step has no usable per-step usage", () => {
-		const acc = createMetricsAccumulator();
-
-		acc.ingest({
-			type: "step-complete",
-			conversationId: "c1",
-			turnId: "t1",
-			stepId: stepId("t1#0"),
-			genTotalMs: 200,
-		});
-		acc.ingest({
-			type: "done",
-			conversationId: "c1",
-			turnId: "t1",
-			reason: "stop",
-		});
-
-		const tm = acc.build("t1");
-		expect(tm.contextSize).toBeUndefined();
-	});
+  it("builds a TurnMetrics from a single-step turn", () => {
+    const acc = createMetricsAccumulator();
+
+    const usageEvent: AgentEvent = {
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    };
+    const stepCompleteEvent: AgentEvent = {
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      ttftMs: 50,
+      decodeMs: 150,
+      genTotalMs: 200,
+    };
+    const doneEvent: AgentEvent = {
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+      durationMs: 500,
+      usage: { inputTokens: 10, outputTokens: 5 },
+    };
+
+    acc.ingest(usageEvent);
+    acc.ingest(stepCompleteEvent);
+    acc.ingest(doneEvent);
+
+    const tm = acc.build("t1");
+    expect(tm.turnId).toBe("t1");
+    expect(tm.usage.inputTokens).toBe(10);
+    expect(tm.usage.outputTokens).toBe(5);
+    expect(tm.durationMs).toBe(500);
+    expect(tm.steps).toHaveLength(1);
+    expect(tm.steps[0]?.stepId).toBe(stepId("t1#0"));
+    expect(tm.steps[0]?.usage.inputTokens).toBe(10);
+    expect(tm.steps[0]?.usage.outputTokens).toBe(5);
+    expect(tm.steps[0]?.ttftMs).toBe(50);
+    expect(tm.steps[0]?.decodeMs).toBe(150);
+    expect(tm.steps[0]?.genTotalMs).toBe(200);
+  });
+
+  it("aggregates multi-step usage and preserves step order", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      genTotalMs: 100,
+    });
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#1"),
+      usage: { inputTokens: 20, outputTokens: 10 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#1"),
+      genTotalMs: 150,
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+      usage: { inputTokens: 30, outputTokens: 15 },
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.steps).toHaveLength(2);
+    expect(tm.steps[0]?.stepId).toBe(stepId("t1#0"));
+    expect(tm.steps[0]?.usage.inputTokens).toBe(10);
+    expect(tm.steps[1]?.stepId).toBe(stepId("t1#1"));
+    expect(tm.steps[1]?.usage.inputTokens).toBe(20);
+    expect(tm.usage.inputTokens).toBe(30);
+    expect(tm.usage.outputTokens).toBe(15);
+  });
+
+  it("joins per-step timing and usage by stepId", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      ttftMs: 50,
+      decodeMs: 100,
+      genTotalMs: 150,
+    });
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.steps).toHaveLength(1);
+    expect(tm.steps[0]?.usage.inputTokens).toBe(10);
+    expect(tm.steps[0]?.ttftMs).toBe(50);
+    expect(tm.steps[0]?.decodeMs).toBe(100);
+    expect(tm.steps[0]?.genTotalMs).toBe(150);
+  });
+
+  it("turn-level usage comes from done event, not step sum", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+      usage: { inputTokens: 100, outputTokens: 50 },
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.usage.inputTokens).toBe(100);
+    expect(tm.usage.outputTokens).toBe(50);
+  });
+
+  it("falls back to summing step usage when done.usage is absent", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.usage.inputTokens).toBe(10);
+    expect(tm.usage.outputTokens).toBe(5);
+  });
+
+  it("tolerates missing usage on a step (timing only)", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      genTotalMs: 200,
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.steps).toHaveLength(1);
+    expect(tm.steps[0]?.usage.inputTokens).toBe(0);
+    expect(tm.steps[0]?.usage.outputTokens).toBe(0);
+    expect(tm.steps[0]?.genTotalMs).toBe(200);
+  });
+
+  it("tolerates missing timing on a step (usage only)", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.steps).toHaveLength(1);
+    expect(tm.steps[0]?.usage.inputTokens).toBe(10);
+    expect(tm.steps[0]?.ttftMs).toBeUndefined();
+    expect(tm.steps[0]?.decodeMs).toBeUndefined();
+    expect(tm.steps[0]?.genTotalMs).toBeUndefined();
+  });
+
+  it("reset clears all accumulated state", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+
+    acc.reset();
+
+    const tm = acc.build("t2");
+    expect(tm.steps).toHaveLength(0);
+    expect(tm.usage.inputTokens).toBe(0);
+    expect(tm.usage.outputTokens).toBe(0);
+  });
+
+  it("contextSize equals inputTokens + outputTokens for a single-step turn", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.contextSize).toBe(15);
+  });
+
+  it("contextSize equals ONLY the last step's inputTokens + outputTokens for a multi-step turn", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      usage: { inputTokens: 10, outputTokens: 5 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+    });
+    acc.ingest({
+      type: "usage",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#1"),
+      usage: { inputTokens: 20, outputTokens: 10 },
+    });
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#1"),
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+      usage: { inputTokens: 100, outputTokens: 50 },
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.contextSize).toBe(30);
+    expect(tm.contextSize).not.toBe(tm.usage.inputTokens);
+  });
+
+  it("contextSize is undefined when the turn has no steps", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.contextSize).toBeUndefined();
+  });
+
+  it("contextSize is undefined when the last step has no usable per-step usage", () => {
+    const acc = createMetricsAccumulator();
+
+    acc.ingest({
+      type: "step-complete",
+      conversationId: "c1",
+      turnId: "t1",
+      stepId: stepId("t1#0"),
+      genTotalMs: 200,
+    });
+    acc.ingest({
+      type: "done",
+      conversationId: "c1",
+      turnId: "t1",
+      reason: "stop",
+    });
+
+    const tm = acc.build("t1");
+    expect(tm.contextSize).toBeUndefined();
+  });
 });
diff --git a/packages/session-orchestrator/src/metrics.ts b/packages/session-orchestrator/src/metrics.ts
index 2dfa533..c0f9566 100644
--- a/packages/session-orchestrator/src/metrics.ts
+++ b/packages/session-orchestrator/src/metrics.ts
@@ -1,138 +1,138 @@
 import type {
-	AgentEvent,
-	StepId,
-	StepMetrics,
-	TurnDoneEvent,
-	TurnMetrics,
-	TurnStepCompleteEvent,
-	TurnUsageEvent,
-	Usage,
+  AgentEvent,
+  StepId,
+  StepMetrics,
+  TurnDoneEvent,
+  TurnMetrics,
+  TurnStepCompleteEvent,
+  TurnUsageEvent,
+  Usage,
 } from "@dispatch/kernel";
 
 const zeroUsage: Usage = { inputTokens: 0, outputTokens: 0 };
 
 interface StepAccumulator {
-	readonly stepId: StepId;
-	usage: Usage | undefined;
-	ttftMs: number | undefined;
-	decodeMs: number | undefined;
-	genTotalMs: number | undefined;
+  readonly stepId: StepId;
+  usage: Usage | undefined;
+  ttftMs: number | undefined;
+  decodeMs: number | undefined;
+  genTotalMs: number | undefined;
 }
 
 export interface MetricsAccumulator {
-	readonly ingest: (event: AgentEvent) => void;
-	readonly build: (turnId: string) => TurnMetrics;
-	readonly reset: () => void;
+  readonly ingest: (event: AgentEvent) => void;
+  readonly build: (turnId: string) => TurnMetrics;
+  readonly reset: () => void;
 }
 
 export function createMetricsAccumulator(): MetricsAccumulator {
-	const steps = new Map<StepId, StepAccumulator>();
-	const stepOrder: StepId[] = [];
-	let doneUsage: Usage | undefined;
-	let doneDurationMs: number | undefined;
+  const steps = new Map<StepId, StepAccumulator>();
+  const stepOrder: StepId[] = [];
+  let doneUsage: Usage | undefined;
+  let doneDurationMs: number | undefined;
 
-	function getOrCreateStep(stepId: StepId): StepAccumulator {
-		let acc = steps.get(stepId);
-		if (acc === undefined) {
-			acc = {
-				stepId,
-				usage: undefined,
-				ttftMs: undefined,
-				decodeMs: undefined,
-				genTotalMs: undefined,
-			};
-			steps.set(stepId, acc);
-			stepOrder.push(stepId);
-		}
-		return acc;
-	}
+  function getOrCreateStep(stepId: StepId): StepAccumulator {
+    let acc = steps.get(stepId);
+    if (acc === undefined) {
+      acc = {
+        stepId,
+        usage: undefined,
+        ttftMs: undefined,
+        decodeMs: undefined,
+        genTotalMs: undefined,
+      };
+      steps.set(stepId, acc);
+      stepOrder.push(stepId);
+    }
+    return acc;
+  }
 
-	function ingest(event: AgentEvent): void {
-		switch (event.type) {
-			case "usage": {
-				const e = event as TurnUsageEvent;
-				if (e.stepId !== undefined) {
-					const acc = getOrCreateStep(e.stepId);
-					acc.usage = e.usage;
-				}
-				break;
-			}
-			case "step-complete": {
-				const e = event as TurnStepCompleteEvent;
-				const acc = getOrCreateStep(e.stepId);
-				acc.ttftMs = e.ttftMs;
-				acc.decodeMs = e.decodeMs;
-				acc.genTotalMs = e.genTotalMs;
-				break;
-			}
-			case "done": {
-				const e = event as TurnDoneEvent;
-				doneUsage = e.usage;
-				doneDurationMs = e.durationMs;
-				break;
-			}
-		}
-	}
+  function ingest(event: AgentEvent): void {
+    switch (event.type) {
+      case "usage": {
+        const e = event as TurnUsageEvent;
+        if (e.stepId !== undefined) {
+          const acc = getOrCreateStep(e.stepId);
+          acc.usage = e.usage;
+        }
+        break;
+      }
+      case "step-complete": {
+        const e = event as TurnStepCompleteEvent;
+        const acc = getOrCreateStep(e.stepId);
+        acc.ttftMs = e.ttftMs;
+        acc.decodeMs = e.decodeMs;
+        acc.genTotalMs = e.genTotalMs;
+        break;
+      }
+      case "done": {
+        const e = event as TurnDoneEvent;
+        doneUsage = e.usage;
+        doneDurationMs = e.durationMs;
+        break;
+      }
+    }
+  }
 
-	function build(turnId: string): TurnMetrics {
-		const stepMetrics: StepMetrics[] = stepOrder.map((stepId) => {
-			const acc = steps.get(stepId);
-			if (acc === undefined) {
-				return { stepId, usage: zeroUsage };
-			}
-			const usage = acc.usage ?? zeroUsage;
-			const sm: StepMetrics = { stepId, usage };
-			if (acc.ttftMs !== undefined) {
-				(sm as { ttftMs?: number }).ttftMs = acc.ttftMs;
-			}
-			if (acc.decodeMs !== undefined) {
-				(sm as { decodeMs?: number }).decodeMs = acc.decodeMs;
-			}
-			if (acc.genTotalMs !== undefined) {
-				(sm as { genTotalMs?: number }).genTotalMs = acc.genTotalMs;
-			}
-			return sm;
-		});
+  function build(turnId: string): TurnMetrics {
+    const stepMetrics: StepMetrics[] = stepOrder.map((stepId) => {
+      const acc = steps.get(stepId);
+      if (acc === undefined) {
+        return { stepId, usage: zeroUsage };
+      }
+      const usage = acc.usage ?? zeroUsage;
+      const sm: StepMetrics = { stepId, usage };
+      if (acc.ttftMs !== undefined) {
+        (sm as { ttftMs?: number }).ttftMs = acc.ttftMs;
+      }
+      if (acc.decodeMs !== undefined) {
+        (sm as { decodeMs?: number }).decodeMs = acc.decodeMs;
+      }
+      if (acc.genTotalMs !== undefined) {
+        (sm as { genTotalMs?: number }).genTotalMs = acc.genTotalMs;
+      }
+      return sm;
+    });
 
-		const aggregateUsage = doneUsage ?? sumStepUsage(stepMetrics);
+    const aggregateUsage = doneUsage ?? sumStepUsage(stepMetrics);
 
-		const tm: TurnMetrics = { turnId, usage: aggregateUsage, steps: stepMetrics };
-		if (doneDurationMs !== undefined) {
-			(tm as { durationMs?: number }).durationMs = doneDurationMs;
-		}
+    const tm: TurnMetrics = { turnId, usage: aggregateUsage, steps: stepMetrics };
+    if (doneDurationMs !== undefined) {
+      (tm as { durationMs?: number }).durationMs = doneDurationMs;
+    }
 
-		// contextSize = final step's inputTokens + outputTokens (true context occupancy).
-		// Omit when no steps or the last step had no usable per-step usage event.
-		if (stepMetrics.length > 0) {
-			const lastStep = stepMetrics[stepMetrics.length - 1];
-			if (lastStep !== undefined) {
-				const lastAcc = steps.get(lastStep.stepId);
-				if (lastAcc?.usage !== undefined) {
-					(tm as { contextSize?: number }).contextSize =
-						lastStep.usage.inputTokens + lastStep.usage.outputTokens;
-				}
-			}
-		}
+    // contextSize = final step's inputTokens + outputTokens (true context occupancy).
+    // Omit when no steps or the last step had no usable per-step usage event.
+    if (stepMetrics.length > 0) {
+      const lastStep = stepMetrics[stepMetrics.length - 1];
+      if (lastStep !== undefined) {
+        const lastAcc = steps.get(lastStep.stepId);
+        if (lastAcc?.usage !== undefined) {
+          (tm as { contextSize?: number }).contextSize =
+            lastStep.usage.inputTokens + lastStep.usage.outputTokens;
+        }
+      }
+    }
 
-		return tm;
-	}
+    return tm;
+  }
 
-	function reset(): void {
-		steps.clear();
-		stepOrder.length = 0;
-		doneUsage = undefined;
-		doneDurationMs = undefined;
-	}
+  function reset(): void {
+    steps.clear();
+    stepOrder.length = 0;
+    doneUsage = undefined;
+    doneDurationMs = undefined;
+  }
 
-	return { ingest, build, reset };
+  return { ingest, build, reset };
 }
 
 function sumStepUsage(steps: readonly StepMetrics[]): Usage {
-	let inputTokens = 0;
-	let outputTokens = 0;
-	for (const s of steps) {
-		inputTokens += s.usage.inputTokens;
-		outputTokens += s.usage.outputTokens;
-	}
-	return { inputTokens, outputTokens };
+  let inputTokens = 0;
+  let outputTokens = 0;
+  for (const s of steps) {
+    inputTokens += s.usage.inputTokens;
+    outputTokens += s.usage.outputTokens;
+  }
+  return { inputTokens, outputTokens };
 }
diff --git a/packages/session-orchestrator/src/orchestrator.test.ts b/packages/session-orchestrator/src/orchestrator.test.ts
index 654c0c3..076ad51 100644
--- a/packages/session-orchestrator/src/orchestrator.test.ts
+++ b/packages/session-orchestrator/src/orchestrator.test.ts
@@ -1,3982 +1,3982 @@
 import { resolve as pathResolve } from "node:path";
 import type { ConversationStore } from "@dispatch/conversation-store";
 import type {
-	AgentEvent,
-	ChatMessage,
-	EventHookDescriptor,
-	Logger,
-	ProviderContract,
-	ProviderEvent,
-	ProviderStreamOptions,
-	ReasoningEffort,
-	RunTurnInput,
-	RunTurnResult,
-	StoredChunk,
-	ToolContract,
-	TurnMetrics,
+  AgentEvent,
+  ChatMessage,
+  EventHookDescriptor,
+  Logger,
+  ProviderContract,
+  ProviderEvent,
+  ProviderStreamOptions,
+  ReasoningEffort,
+  RunTurnInput,
+  RunTurnResult,
+  StoredChunk,
+  ToolContract,
+  TurnMetrics,
 } from "@dispatch/kernel";
 import { runTurn } from "@dispatch/kernel";
 import type { SystemPromptService } from "@dispatch/system-prompt";
 import { describe, expect, it } from "vitest";
 import {
-	type ConversationOpenedPayload,
-	type ConversationStatusChangedPayload,
-	createCompactionService,
-	createSessionOrchestrator,
-	createWarmService,
-	type TurnLifecyclePayload,
-	type WarmCompletedPayload,
+  type ConversationOpenedPayload,
+  type ConversationStatusChangedPayload,
+  createCompactionService,
+  createSessionOrchestrator,
+  createWarmService,
+  type TurnLifecyclePayload,
+  type WarmCompletedPayload,
 } from "./orchestrator.js";
 import type { ToolAssembly } from "./tools-filter.js";
 
 function createInMemoryStore(): ConversationStore & {
-	readonly data: Map<string, ChatMessage[]>;
-	readonly metricsData: Map<string, TurnMetrics[]>;
-	readonly cwdData: Map<string, string>;
-	readonly computerData: Map<string, string>;
-	readonly effortData: Map<string, ReasoningEffort>;
-	readonly modelData: Map<string, string>;
-	readonly workspaceIdData: Map<string, string>;
+  readonly data: Map<string, ChatMessage[]>;
+  readonly metricsData: Map<string, TurnMetrics[]>;
+  readonly cwdData: Map<string, string>;
+  readonly computerData: Map<string, string>;
+  readonly effortData: Map<string, ReasoningEffort>;
+  readonly modelData: Map<string, string>;
+  readonly workspaceIdData: Map<string, string>;
 } {
-	const data = new Map<string, ChatMessage[]>();
-	const metricsData = new Map<string, TurnMetrics[]>();
-	const cwdData = new Map<string, string>();
-	const computerData = new Map<string, string>();
-	const effortData = new Map<string, ReasoningEffort>();
-	const modelData = new Map<string, string>();
-	const workspaceIdData = new Map<string, string>();
-	// Track conversations that have a meta row. In the real store, append,
-	// setWorkspaceId, setConversationStatus, setConversationTitle, and
-	// setCompactedFrom all create a minimal meta row on first contact.
-	// getConversationMeta returns non-null for known conversations so the
-	// orchestrator's newness detection (meta === null) matches reality.
-	const knownConversations = new Set<string>();
-	return {
-		data,
-		metricsData,
-		cwdData,
-		computerData,
-		effortData,
-		modelData,
-		workspaceIdData,
-		async append(conversationId, messages) {
-			knownConversations.add(conversationId);
-			const existing = data.get(conversationId) ?? [];
-			data.set(conversationId, [...existing, ...messages]);
-		},
-		async load(conversationId) {
-			return [...(data.get(conversationId) ?? [])];
-		},
-		async loadSince(conversationId, sinceSeq) {
-			const messages = data.get(conversationId) ?? [];
-			const result: StoredChunk[] = [];
-			let seq = 1;
-			for (const msg of messages) {
-				for (const chunk of msg.chunks) {
-					if (sinceSeq === undefined || seq > sinceSeq) {
-						result.push({ seq, role: msg.role, chunk });
-					}
-					seq++;
-				}
-			}
-			return result;
-		},
-		async appendMetrics(conversationId, metrics) {
-			const existing = metricsData.get(conversationId) ?? [];
-			metricsData.set(conversationId, [...existing, metrics]);
-		},
-		async loadMetrics(conversationId) {
-			return [...(metricsData.get(conversationId) ?? [])];
-		},
-		async getCwd(conversationId) {
-			return cwdData.get(conversationId) ?? null;
-		},
-		async setCwd(conversationId, cwd) {
-			cwdData.set(conversationId, cwd);
-		},
-		async clearCwd(conversationId) {
-			cwdData.delete(conversationId);
-		},
-		async getComputerId(conversationId) {
-			return computerData.get(conversationId) ?? null;
-		},
-		async setComputerId(conversationId, alias) {
-			if (alias === null) {
-				computerData.delete(conversationId);
-			} else {
-				computerData.set(conversationId, alias);
-			}
-		},
-		async clearComputerId(conversationId) {
-			computerData.delete(conversationId);
-		},
-		async getReasoningEffort(conversationId) {
-			return effortData.get(conversationId) ?? null;
-		},
-		async setReasoningEffort(conversationId, effort) {
-			effortData.set(conversationId, effort);
-		},
-		async getModel(conversationId) {
-			return modelData.get(conversationId) ?? null;
-		},
-		async setModel(conversationId, model) {
-			// Mirror the real store contract: an empty string clears the key.
-			if (model === "") {
-				modelData.delete(conversationId);
-			} else {
-				modelData.set(conversationId, model);
-			}
-		},
-		async listConversations() {
-			return [];
-		},
-		async getConversationMeta(conversationId) {
-			if (!knownConversations.has(conversationId)) return null;
-			return {
-				id: conversationId,
-				createdAt: 0,
-				lastActivityAt: 0,
-				title: "Untitled",
-				status: "idle",
-				workspaceId: workspaceIdData.get(conversationId) ?? "default",
-			};
-		},
-		async setConversationTitle(conversationId) {
-			knownConversations.add(conversationId);
-		},
-		async getConversationStatus() {
-			return null;
-		},
-		async setConversationStatus(conversationId) {
-			knownConversations.add(conversationId);
-		},
-		async replaceHistory(conversationId, messages) {
-			knownConversations.add(conversationId);
-			data.set(conversationId, [...messages]);
-		},
-		async getCompactPercent() {
-			return null;
-		},
-		async setCompactPercent() {},
-		async forkHistory(_sourceId, targetId) {
-			knownConversations.add(targetId);
-		},
-		async setCompactedFrom(conversationId) {
-			knownConversations.add(conversationId);
-		},
-		async getWorkspace() {
-			return null;
-		},
-		async ensureWorkspace(id) {
-			return {
-				id,
-				title: id,
-				defaultCwd: null,
-				defaultComputerId: null,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async setWorkspaceTitle(id, title) {
-			return {
-				id,
-				title,
-				defaultCwd: null,
-				defaultComputerId: null,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async setWorkspaceDefaultCwd(id, defaultCwd) {
-			return {
-				id,
-				title: id,
-				defaultCwd,
-				defaultComputerId: null,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async setWorkspaceDefaultComputerId(id, defaultComputerId) {
-			return {
-				id,
-				title: id,
-				defaultCwd: null,
-				defaultComputerId,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async deleteWorkspace() {
-			return { closedCount: 0 };
-		},
-		async listWorkspaces() {
-			return [];
-		},
-		async getWorkspaceId(conversationId) {
-			return workspaceIdData.get(conversationId) ?? "default";
-		},
-		async setWorkspaceId(conversationId, workspaceId) {
-			workspaceIdData.set(conversationId, workspaceId);
-			knownConversations.add(conversationId);
-		},
-		async getEffectiveCwd(conversationId, overrideCwd) {
-			return overrideCwd ?? cwdData.get(conversationId) ?? null;
-		},
-		async getEffectiveComputer(conversationId, overrideAlias) {
-			return overrideAlias ?? computerData.get(conversationId) ?? null;
-		},
-	};
+  const data = new Map<string, ChatMessage[]>();
+  const metricsData = new Map<string, TurnMetrics[]>();
+  const cwdData = new Map<string, string>();
+  const computerData = new Map<string, string>();
+  const effortData = new Map<string, ReasoningEffort>();
+  const modelData = new Map<string, string>();
+  const workspaceIdData = new Map<string, string>();
+  // Track conversations that have a meta row. In the real store, append,
+  // setWorkspaceId, setConversationStatus, setConversationTitle, and
+  // setCompactedFrom all create a minimal meta row on first contact.
+  // getConversationMeta returns non-null for known conversations so the
+  // orchestrator's newness detection (meta === null) matches reality.
+  const knownConversations = new Set<string>();
+  return {
+    data,
+    metricsData,
+    cwdData,
+    computerData,
+    effortData,
+    modelData,
+    workspaceIdData,
+    async append(conversationId, messages) {
+      knownConversations.add(conversationId);
+      const existing = data.get(conversationId) ?? [];
+      data.set(conversationId, [...existing, ...messages]);
+    },
+    async load(conversationId) {
+      return [...(data.get(conversationId) ?? [])];
+    },
+    async loadSince(conversationId, sinceSeq) {
+      const messages = data.get(conversationId) ?? [];
+      const result: StoredChunk[] = [];
+      let seq = 1;
+      for (const msg of messages) {
+        for (const chunk of msg.chunks) {
+          if (sinceSeq === undefined || seq > sinceSeq) {
+            result.push({ seq, role: msg.role, chunk });
+          }
+          seq++;
+        }
+      }
+      return result;
+    },
+    async appendMetrics(conversationId, metrics) {
+      const existing = metricsData.get(conversationId) ?? [];
+      metricsData.set(conversationId, [...existing, metrics]);
+    },
+    async loadMetrics(conversationId) {
+      return [...(metricsData.get(conversationId) ?? [])];
+    },
+    async getCwd(conversationId) {
+      return cwdData.get(conversationId) ?? null;
+    },
+    async setCwd(conversationId, cwd) {
+      cwdData.set(conversationId, cwd);
+    },
+    async clearCwd(conversationId) {
+      cwdData.delete(conversationId);
+    },
+    async getComputerId(conversationId) {
+      return computerData.get(conversationId) ?? null;
+    },
+    async setComputerId(conversationId, alias) {
+      if (alias === null) {
+        computerData.delete(conversationId);
+      } else {
+        computerData.set(conversationId, alias);
+      }
+    },
+    async clearComputerId(conversationId) {
+      computerData.delete(conversationId);
+    },
+    async getReasoningEffort(conversationId) {
+      return effortData.get(conversationId) ?? null;
+    },
+    async setReasoningEffort(conversationId, effort) {
+      effortData.set(conversationId, effort);
+    },
+    async getModel(conversationId) {
+      return modelData.get(conversationId) ?? null;
+    },
+    async setModel(conversationId, model) {
+      // Mirror the real store contract: an empty string clears the key.
+      if (model === "") {
+        modelData.delete(conversationId);
+      } else {
+        modelData.set(conversationId, model);
+      }
+    },
+    async listConversations() {
+      return [];
+    },
+    async getConversationMeta(conversationId) {
+      if (!knownConversations.has(conversationId)) return null;
+      return {
+        id: conversationId,
+        createdAt: 0,
+        lastActivityAt: 0,
+        title: "Untitled",
+        status: "idle",
+        workspaceId: workspaceIdData.get(conversationId) ?? "default",
+      };
+    },
+    async setConversationTitle(conversationId) {
+      knownConversations.add(conversationId);
+    },
+    async getConversationStatus() {
+      return null;
+    },
+    async setConversationStatus(conversationId) {
+      knownConversations.add(conversationId);
+    },
+    async replaceHistory(conversationId, messages) {
+      knownConversations.add(conversationId);
+      data.set(conversationId, [...messages]);
+    },
+    async getCompactPercent() {
+      return null;
+    },
+    async setCompactPercent() {},
+    async forkHistory(_sourceId, targetId) {
+      knownConversations.add(targetId);
+    },
+    async setCompactedFrom(conversationId) {
+      knownConversations.add(conversationId);
+    },
+    async getWorkspace() {
+      return null;
+    },
+    async ensureWorkspace(id) {
+      return {
+        id,
+        title: id,
+        defaultCwd: null,
+        defaultComputerId: null,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async setWorkspaceTitle(id, title) {
+      return {
+        id,
+        title,
+        defaultCwd: null,
+        defaultComputerId: null,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async setWorkspaceDefaultCwd(id, defaultCwd) {
+      return {
+        id,
+        title: id,
+        defaultCwd,
+        defaultComputerId: null,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async setWorkspaceDefaultComputerId(id, defaultComputerId) {
+      return {
+        id,
+        title: id,
+        defaultCwd: null,
+        defaultComputerId,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async deleteWorkspace() {
+      return { closedCount: 0 };
+    },
+    async listWorkspaces() {
+      return [];
+    },
+    async getWorkspaceId(conversationId) {
+      return workspaceIdData.get(conversationId) ?? "default";
+    },
+    async setWorkspaceId(conversationId, workspaceId) {
+      workspaceIdData.set(conversationId, workspaceId);
+      knownConversations.add(conversationId);
+    },
+    async getEffectiveCwd(conversationId, overrideCwd) {
+      return overrideCwd ?? cwdData.get(conversationId) ?? null;
+    },
+    async getEffectiveComputer(conversationId, overrideAlias) {
+      return overrideAlias ?? computerData.get(conversationId) ?? null;
+    },
+  };
 }
 
 function createFakeProvider(script: ProviderEvent[][]): ProviderContract {
-	let callIndex = 0;
-	return {
-		id: "fake",
-		stream(_messages, _tools) {
-			const events = script[callIndex] ?? [];
-			callIndex++;
-			return (async function* () {
-				for (const event of events) {
-					yield event;
-				}
-			})();
-		},
-	};
+  let callIndex = 0;
+  return {
+    id: "fake",
+    stream(_messages, _tools) {
+      const events = script[callIndex] ?? [];
+      callIndex++;
+      return (async function* () {
+        for (const event of events) {
+          yield event;
+        }
+      })();
+    },
+  };
 }
 
 function collectEvents(): { events: AgentEvent[]; onEvent: (event: AgentEvent) => void } {
-	const events: AgentEvent[] = [];
-	return { events, onEvent: (event) => events.push(event) };
+  const events: AgentEvent[] = [];
+  return { events, onEvent: (event) => events.push(event) };
 }
 
 function createFakeTool(
-	name: string,
-	handler: (input: unknown) => Promise<{ content: string }>,
+  name: string,
+  handler: (input: unknown) => Promise<{ content: string }>,
 ): ToolContract {
-	return {
-		name,
-		description: `Fake tool: ${name}`,
-		parameters: { type: "object" },
-		execute: async (input) => handler(input),
-	};
+  return {
+    name,
+    description: `Fake tool: ${name}`,
+    parameters: { type: "object" },
+    execute: async (input) => handler(input),
+  };
 }
 
 function identityApplyToolsFilter(assembly: ToolAssembly): Promise<ToolAssembly> {
-	return Promise.resolve(assembly);
+  return Promise.resolve(assembly);
 }
 
 describe("handleMessage integration", () => {
-	it("loads history, runs turn, emits events, and persists result", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "text-delta", delta: " there" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const { events, onEvent } = collectEvents();
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-1",
-			text: "Hi",
-			onEvent,
-		});
-
-		expect(events.length).toBeGreaterThan(0);
-		const textDeltas = events.filter((e) => e.type === "text-delta");
-		expect(textDeltas).toHaveLength(2);
-
-		const stored = store.data.get("conv-1");
-		expect(stored).toBeDefined();
-		expect(stored).toHaveLength(2);
-		expect(stored?.[0]?.role).toBe("user");
-		expect(stored?.[1]?.role).toBe("assistant");
-
-		const userChunks = stored?.[0]?.chunks ?? [];
-		expect(userChunks[0]).toEqual({ type: "text", text: "Hi" });
-
-		const assistantChunks = stored?.[1]?.chunks ?? [];
-		expect(assistantChunks.some((c) => c.type === "text")).toBe(true);
-	});
-
-	it("multi-turn: second call sees first turn in history", async () => {
-		const store = createInMemoryStore();
-		let capturedMessages: ChatMessage[] | undefined;
-
-		let callCount = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream(messages, _tools) {
-				if (callCount === 1) {
-					capturedMessages = [...messages];
-				}
-				callCount++;
-				return (async function* () {
-					yield { type: "text-delta", delta: `Reply ${callCount}` } as ProviderEvent;
-					yield { type: "finish", reason: "stop" } as ProviderEvent;
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-multi",
-			text: "First message",
-			onEvent: () => {},
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-multi",
-			text: "Second message",
-			onEvent: () => {},
-		});
-
-		expect(capturedMessages).toBeDefined();
-		expect(capturedMessages?.length).toBeGreaterThanOrEqual(3);
-
-		expect(capturedMessages?.[0]?.role).toBe("user");
-		const firstUserText = capturedMessages?.[0]?.chunks[0];
-		expect(firstUserText).toEqual({ type: "text", text: "First message" });
-
-		expect(capturedMessages?.[1]?.role).toBe("assistant");
-
-		const lastUser = capturedMessages?.findLast((m) => m.role === "user");
-		expect(lastUser).toBeDefined();
-		const lastUserText = lastUser?.chunks[0];
-		expect(lastUserText).toEqual({ type: "text", text: "Second message" });
-	});
-
-	it("uses custom dispatch policy when resolveDispatch is provided", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			resolveDispatch: () => ({ maxConcurrent: 4, eager: false }),
-			runTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-dispatch",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const stored = store.data.get("conv-dispatch");
-		expect(stored).toBeDefined();
-		expect(stored?.length).toBeGreaterThanOrEqual(1);
-	});
+  it("loads history, runs turn, emits events, and persists result", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "text-delta", delta: " there" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const { events, onEvent } = collectEvents();
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-1",
+      text: "Hi",
+      onEvent,
+    });
+
+    expect(events.length).toBeGreaterThan(0);
+    const textDeltas = events.filter((e) => e.type === "text-delta");
+    expect(textDeltas).toHaveLength(2);
+
+    const stored = store.data.get("conv-1");
+    expect(stored).toBeDefined();
+    expect(stored).toHaveLength(2);
+    expect(stored?.[0]?.role).toBe("user");
+    expect(stored?.[1]?.role).toBe("assistant");
+
+    const userChunks = stored?.[0]?.chunks ?? [];
+    expect(userChunks[0]).toEqual({ type: "text", text: "Hi" });
+
+    const assistantChunks = stored?.[1]?.chunks ?? [];
+    expect(assistantChunks.some((c) => c.type === "text")).toBe(true);
+  });
+
+  it("multi-turn: second call sees first turn in history", async () => {
+    const store = createInMemoryStore();
+    let capturedMessages: ChatMessage[] | undefined;
+
+    let callCount = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream(messages, _tools) {
+        if (callCount === 1) {
+          capturedMessages = [...messages];
+        }
+        callCount++;
+        return (async function* () {
+          yield { type: "text-delta", delta: `Reply ${callCount}` } as ProviderEvent;
+          yield { type: "finish", reason: "stop" } as ProviderEvent;
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-multi",
+      text: "First message",
+      onEvent: () => {},
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-multi",
+      text: "Second message",
+      onEvent: () => {},
+    });
+
+    expect(capturedMessages).toBeDefined();
+    expect(capturedMessages?.length).toBeGreaterThanOrEqual(3);
+
+    expect(capturedMessages?.[0]?.role).toBe("user");
+    const firstUserText = capturedMessages?.[0]?.chunks[0];
+    expect(firstUserText).toEqual({ type: "text", text: "First message" });
+
+    expect(capturedMessages?.[1]?.role).toBe("assistant");
+
+    const lastUser = capturedMessages?.findLast((m) => m.role === "user");
+    expect(lastUser).toBeDefined();
+    const lastUserText = lastUser?.chunks[0];
+    expect(lastUserText).toEqual({ type: "text", text: "Second message" });
+  });
+
+  it("uses custom dispatch policy when resolveDispatch is provided", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      resolveDispatch: () => ({ maxConcurrent: 4, eager: false }),
+      runTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-dispatch",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const stored = store.data.get("conv-dispatch");
+    expect(stored).toBeDefined();
+    expect(stored?.length).toBeGreaterThanOrEqual(1);
+  });
 });
 
 function createCapturingRunTurn(): {
-	result: RunTurnResult;
-	captured: RunTurnInput[];
-	captureRunTurn: (input: RunTurnInput) => Promise<RunTurnResult>;
+  result: RunTurnResult;
+  captured: RunTurnInput[];
+  captureRunTurn: (input: RunTurnInput) => Promise<RunTurnResult>;
 } {
-	const result: RunTurnResult = {
-		messages: [{ role: "assistant", chunks: [{ type: "text", text: "ok" }] }],
-		usage: { inputTokens: 1, outputTokens: 1 },
-		finishReason: "stop",
-	};
-	const captured: RunTurnInput[] = [];
-	return {
-		result,
-		captured,
-		captureRunTurn: async (input) => {
-			captured.push(input);
-			return result;
-		},
-	};
+  const result: RunTurnResult = {
+    messages: [{ role: "assistant", chunks: [{ type: "text", text: "ok" }] }],
+    usage: { inputTokens: 1, outputTokens: 1 },
+    finishReason: "stop",
+  };
+  const captured: RunTurnInput[] = [];
+  return {
+    result,
+    captured,
+    captureRunTurn: async (input) => {
+      captured.push(input);
+      return result;
+    },
+  };
 }
 
 describe("handleMessage model resolution", () => {
-	it("modelName resolves → runTurn receives resolved provider, providerOpts.model, and cwd", async () => {
-		const store = createInMemoryStore();
-		const resolvedProvider: ProviderContract = { id: "resolved", stream: async function* () {} };
-		const fallbackProvider: ProviderContract = { id: "fallback", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => fallbackProvider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			resolveModel: (name) => {
-				if (name === "cred/gpt-4") return { provider: resolvedProvider, model: "gpt-4" };
-				return undefined;
-			},
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-model",
-			text: "hi",
-			onEvent: () => {},
-			modelName: "cred/gpt-4",
-			cwd: "/work/dir",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.provider).toBe(resolvedProvider);
-		expect(captured[0]?.providerOpts).toEqual({ reasoningEffort: "high", model: "gpt-4" });
-		expect(captured[0]?.cwd).toBe("/work/dir");
-	});
-
-	it("modelName given but resolveModel returns undefined → error event emitted, runTurn NOT called", async () => {
-		const store = createInMemoryStore();
-		const fallbackProvider: ProviderContract = { id: "fallback", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-		const events: AgentEvent[] = [];
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => fallbackProvider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			resolveModel: () => undefined,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-unknown",
-			text: "hi",
-			onEvent: (e) => events.push(e),
-			modelName: "cred/nonexistent",
-		});
-
-		expect(captured).toHaveLength(0);
-		const errorEvents = events.filter((e) => e.type === "error");
-		expect(errorEvents).toHaveLength(1);
-		expect((errorEvents[0] as AgentEvent & { type: "error" }).message).toBe(
-			"unknown model: cred/nonexistent",
-		);
-		expect((errorEvents[0] as AgentEvent & { type: "error" }).conversationId).toBe("conv-unknown");
-		expect((errorEvents[0] as AgentEvent & { type: "error" }).turnId).toMatch(/^turn-/);
-	});
-
-	it("no modelName → falls back to resolveProvider(), no model override", async () => {
-		const store = createInMemoryStore();
-		const fallbackProvider: ProviderContract = { id: "fallback", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => fallbackProvider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			resolveModel: () => ({
-				provider: { id: "should-not-use", stream: async function* () {} },
-				model: "x",
-			}),
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-fallback",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.provider).toBe(fallbackProvider);
-		expect(captured[0]?.providerOpts).toEqual({ reasoningEffort: "high" });
-	});
-
-	it("cwd is forwarded to RunTurnInput.cwd and absent when not provided", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-cwd",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "/custom/path",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/custom/path");
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-no-cwd",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(2);
-		expect(captured[1]?.cwd).toBeUndefined();
-	});
-
-	it("computerId is forwarded to RunTurnInput.computerId and absent when not provided", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-computer",
-			text: "hi",
-			onEvent: () => {},
-			computerId: "my-ssh-host",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.computerId).toBe("my-ssh-host");
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-no-computer",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(2);
-		expect(captured[1]?.computerId).toBeUndefined();
-	});
-
-	it("computerId override persists via setComputerId (mirrors setCwd-on-override)", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-persist-computer",
-			text: "hi",
-			onEvent: () => {},
-			computerId: "persisted-host",
-		});
-
-		expect(store.computerData.get("conv-persist-computer")).toBe("persisted-host");
-	});
-
-	it("computerId not provided → setComputerId NOT called (no override persisted)", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-no-persist",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(store.computerData.get("conv-no-persist")).toBeUndefined();
-	});
-
-	it("computerId threads into ToolAssembly passed to applyToolsFilter", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captureRunTurn } = createCapturingRunTurn();
-
-		const capturedAssemblies: ToolAssembly[] = [];
-		const recordingApplyToolsFilter = (assembly: ToolAssembly): Promise<ToolAssembly> => {
-			capturedAssemblies.push(assembly);
-			return Promise.resolve(assembly);
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: recordingApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-assembly",
-			text: "hi",
-			onEvent: () => {},
-			computerId: "remote-host",
-		});
-
-		expect(capturedAssemblies).toHaveLength(1);
-		expect(capturedAssemblies[0]?.computerId).toBe("remote-host");
-	});
-
-	it("forwards an injected now into the RunTurnInput passed to runTurn", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-		const fakeNow = () => 42;
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			now: fakeNow,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-now",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.now).toBe(fakeNow);
-		expect(captured[0]?.now?.()).toBe(42);
-	});
-
-	it("omits now from RunTurnInput when deps.now is not provided", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-no-now",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.now).toBeUndefined();
-	});
+  it("modelName resolves → runTurn receives resolved provider, providerOpts.model, and cwd", async () => {
+    const store = createInMemoryStore();
+    const resolvedProvider: ProviderContract = { id: "resolved", stream: async function* () {} };
+    const fallbackProvider: ProviderContract = { id: "fallback", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => fallbackProvider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      resolveModel: (name) => {
+        if (name === "cred/gpt-4") return { provider: resolvedProvider, model: "gpt-4" };
+        return undefined;
+      },
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-model",
+      text: "hi",
+      onEvent: () => {},
+      modelName: "cred/gpt-4",
+      cwd: "/work/dir",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.provider).toBe(resolvedProvider);
+    expect(captured[0]?.providerOpts).toEqual({ reasoningEffort: "high", model: "gpt-4" });
+    expect(captured[0]?.cwd).toBe("/work/dir");
+  });
+
+  it("modelName given but resolveModel returns undefined → error event emitted, runTurn NOT called", async () => {
+    const store = createInMemoryStore();
+    const fallbackProvider: ProviderContract = { id: "fallback", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+    const events: AgentEvent[] = [];
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => fallbackProvider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      resolveModel: () => undefined,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-unknown",
+      text: "hi",
+      onEvent: (e) => events.push(e),
+      modelName: "cred/nonexistent",
+    });
+
+    expect(captured).toHaveLength(0);
+    const errorEvents = events.filter((e) => e.type === "error");
+    expect(errorEvents).toHaveLength(1);
+    expect((errorEvents[0] as AgentEvent & { type: "error" }).message).toBe(
+      "unknown model: cred/nonexistent",
+    );
+    expect((errorEvents[0] as AgentEvent & { type: "error" }).conversationId).toBe("conv-unknown");
+    expect((errorEvents[0] as AgentEvent & { type: "error" }).turnId).toMatch(/^turn-/);
+  });
+
+  it("no modelName → falls back to resolveProvider(), no model override", async () => {
+    const store = createInMemoryStore();
+    const fallbackProvider: ProviderContract = { id: "fallback", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => fallbackProvider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      resolveModel: () => ({
+        provider: { id: "should-not-use", stream: async function* () {} },
+        model: "x",
+      }),
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-fallback",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.provider).toBe(fallbackProvider);
+    expect(captured[0]?.providerOpts).toEqual({ reasoningEffort: "high" });
+  });
+
+  it("cwd is forwarded to RunTurnInput.cwd and absent when not provided", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-cwd",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "/custom/path",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/custom/path");
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-no-cwd",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(2);
+    expect(captured[1]?.cwd).toBeUndefined();
+  });
+
+  it("computerId is forwarded to RunTurnInput.computerId and absent when not provided", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-computer",
+      text: "hi",
+      onEvent: () => {},
+      computerId: "my-ssh-host",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.computerId).toBe("my-ssh-host");
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-no-computer",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(2);
+    expect(captured[1]?.computerId).toBeUndefined();
+  });
+
+  it("computerId override persists via setComputerId (mirrors setCwd-on-override)", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-persist-computer",
+      text: "hi",
+      onEvent: () => {},
+      computerId: "persisted-host",
+    });
+
+    expect(store.computerData.get("conv-persist-computer")).toBe("persisted-host");
+  });
+
+  it("computerId not provided → setComputerId NOT called (no override persisted)", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-no-persist",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(store.computerData.get("conv-no-persist")).toBeUndefined();
+  });
+
+  it("computerId threads into ToolAssembly passed to applyToolsFilter", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captureRunTurn } = createCapturingRunTurn();
+
+    const capturedAssemblies: ToolAssembly[] = [];
+    const recordingApplyToolsFilter = (assembly: ToolAssembly): Promise<ToolAssembly> => {
+      capturedAssemblies.push(assembly);
+      return Promise.resolve(assembly);
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: recordingApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-assembly",
+      text: "hi",
+      onEvent: () => {},
+      computerId: "remote-host",
+    });
+
+    expect(capturedAssemblies).toHaveLength(1);
+    expect(capturedAssemblies[0]?.computerId).toBe("remote-host");
+  });
+
+  it("forwards an injected now into the RunTurnInput passed to runTurn", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+    const fakeNow = () => 42;
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      now: fakeNow,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-now",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.now).toBe(fakeNow);
+    expect(captured[0]?.now?.()).toBe(42);
+  });
+
+  it("omits now from RunTurnInput when deps.now is not provided", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-no-now",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.now).toBeUndefined();
+  });
 });
 
 describe("turn-sealed event", () => {
-	it("emits turn-sealed after persisting the turn", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const { events, onEvent } = collectEvents();
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-seal",
-			text: "test",
-			onEvent,
-		});
-
-		const sealedEvents = events.filter((e) => e.type === "turn-sealed");
-		expect(sealedEvents).toHaveLength(1);
-		const sealed = sealedEvents[0] as AgentEvent & { type: "turn-sealed" };
-		expect(sealed.conversationId).toBe("conv-seal");
-		expect(sealed.turnId).toMatch(/^turn-/);
-	});
-
-	it("turn-sealed is emitted after the store append", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const ordering: string[] = [];
-		const wrappedStore: ConversationStore = {
-			...store,
-			async append(conversationId, messages) {
-				await store.append(conversationId, messages);
-				ordering.push("append");
-			},
-			async appendMetrics(conversationId, metrics) {
-				await store.appendMetrics(conversationId, metrics);
-				ordering.push("appendMetrics");
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: wrappedStore,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-order",
-			text: "test",
-			onEvent: (event) => {
-				if (event.type === "turn-sealed") {
-					ordering.push("turn-sealed");
-				}
-			},
-		});
-
-		expect(ordering).toEqual(["append", "append", "appendMetrics", "turn-sealed"]);
-	});
-
-	it("does not emit turn-sealed when append throws — emits error event instead", async () => {
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const failingStore: ConversationStore = {
-			async append() {
-				throw new Error("storage failure");
-			},
-			async load() {
-				return [];
-			},
-			async loadSince() {
-				return [];
-			},
-			async appendMetrics() {
-				return undefined;
-			},
-			async loadMetrics() {
-				return [];
-			},
-			async getCwd() {
-				return null;
-			},
-			async setCwd() {},
-			async clearCwd() {},
-			async getComputerId() {
-				return null;
-			},
-			async setComputerId() {},
-			async clearComputerId() {},
-			async getReasoningEffort() {
-				return null;
-			},
-			async setReasoningEffort() {},
-			async getModel() {
-				return null;
-			},
-			async setModel() {},
-			async listConversations() {
-				return [];
-			},
-			async getConversationMeta() {
-				return null;
-			},
-			async setConversationTitle() {},
-			async getConversationStatus() {
-				return null;
-			},
-			async setConversationStatus() {},
-			async replaceHistory() {},
-			async getCompactPercent() {
-				return null;
-			},
-			async setCompactPercent() {},
-			async forkHistory() {},
-			async setCompactedFrom() {},
-			async getWorkspace() {
-				return null;
-			},
-			async ensureWorkspace(id) {
-				return {
-					id,
-					title: id,
-					defaultCwd: null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceTitle(id, title) {
-				return {
-					id,
-					title,
-					defaultCwd: null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceDefaultCwd(id, defaultCwd) {
-				return {
-					id,
-					title: id,
-					defaultCwd,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceDefaultComputerId(id, defaultComputerId) {
-				return {
-					id,
-					title: id,
-					defaultCwd: null,
-					defaultComputerId,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async deleteWorkspace() {
-				return { closedCount: 0 };
-			},
-			async listWorkspaces() {
-				return [];
-			},
-			async getWorkspaceId() {
-				return "default";
-			},
-			async setWorkspaceId() {},
-			async getEffectiveCwd() {
-				return null;
-			},
-			async getEffectiveComputer() {
-				return null;
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: failingStore,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const { events, onEvent } = collectEvents();
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-fail",
-			text: "test",
-			onEvent,
-		});
-
-		const sealedEvents = events.filter((e) => e.type === "turn-sealed");
-		expect(sealedEvents).toHaveLength(0);
-
-		const errorEvents = events.filter((e) => e.type === "error");
-		expect(errorEvents).toHaveLength(1);
-		expect((errorEvents[0] as AgentEvent & { type: "error" }).message).toBe("storage failure");
-	});
+  it("emits turn-sealed after persisting the turn", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const { events, onEvent } = collectEvents();
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-seal",
+      text: "test",
+      onEvent,
+    });
+
+    const sealedEvents = events.filter((e) => e.type === "turn-sealed");
+    expect(sealedEvents).toHaveLength(1);
+    const sealed = sealedEvents[0] as AgentEvent & { type: "turn-sealed" };
+    expect(sealed.conversationId).toBe("conv-seal");
+    expect(sealed.turnId).toMatch(/^turn-/);
+  });
+
+  it("turn-sealed is emitted after the store append", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const ordering: string[] = [];
+    const wrappedStore: ConversationStore = {
+      ...store,
+      async append(conversationId, messages) {
+        await store.append(conversationId, messages);
+        ordering.push("append");
+      },
+      async appendMetrics(conversationId, metrics) {
+        await store.appendMetrics(conversationId, metrics);
+        ordering.push("appendMetrics");
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: wrappedStore,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-order",
+      text: "test",
+      onEvent: (event) => {
+        if (event.type === "turn-sealed") {
+          ordering.push("turn-sealed");
+        }
+      },
+    });
+
+    expect(ordering).toEqual(["append", "append", "appendMetrics", "turn-sealed"]);
+  });
+
+  it("does not emit turn-sealed when append throws — emits error event instead", async () => {
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const failingStore: ConversationStore = {
+      async append() {
+        throw new Error("storage failure");
+      },
+      async load() {
+        return [];
+      },
+      async loadSince() {
+        return [];
+      },
+      async appendMetrics() {
+        return undefined;
+      },
+      async loadMetrics() {
+        return [];
+      },
+      async getCwd() {
+        return null;
+      },
+      async setCwd() {},
+      async clearCwd() {},
+      async getComputerId() {
+        return null;
+      },
+      async setComputerId() {},
+      async clearComputerId() {},
+      async getReasoningEffort() {
+        return null;
+      },
+      async setReasoningEffort() {},
+      async getModel() {
+        return null;
+      },
+      async setModel() {},
+      async listConversations() {
+        return [];
+      },
+      async getConversationMeta() {
+        return null;
+      },
+      async setConversationTitle() {},
+      async getConversationStatus() {
+        return null;
+      },
+      async setConversationStatus() {},
+      async replaceHistory() {},
+      async getCompactPercent() {
+        return null;
+      },
+      async setCompactPercent() {},
+      async forkHistory() {},
+      async setCompactedFrom() {},
+      async getWorkspace() {
+        return null;
+      },
+      async ensureWorkspace(id) {
+        return {
+          id,
+          title: id,
+          defaultCwd: null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceTitle(id, title) {
+        return {
+          id,
+          title,
+          defaultCwd: null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceDefaultCwd(id, defaultCwd) {
+        return {
+          id,
+          title: id,
+          defaultCwd,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceDefaultComputerId(id, defaultComputerId) {
+        return {
+          id,
+          title: id,
+          defaultCwd: null,
+          defaultComputerId,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async deleteWorkspace() {
+        return { closedCount: 0 };
+      },
+      async listWorkspaces() {
+        return [];
+      },
+      async getWorkspaceId() {
+        return "default";
+      },
+      async setWorkspaceId() {},
+      async getEffectiveCwd() {
+        return null;
+      },
+      async getEffectiveComputer() {
+        return null;
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: failingStore,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const { events, onEvent } = collectEvents();
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-fail",
+      text: "test",
+      onEvent,
+    });
+
+    const sealedEvents = events.filter((e) => e.type === "turn-sealed");
+    expect(sealedEvents).toHaveLength(0);
+
+    const errorEvents = events.filter((e) => e.type === "error");
+    expect(errorEvents).toHaveLength(1);
+    expect((errorEvents[0] as AgentEvent & { type: "error" }).message).toBe("storage failure");
+  });
 });
 
 describe("turn metrics persistence", () => {
-	it("persists a TurnMetrics after a single-step turn seals", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "usage", usage: { inputTokens: 10, outputTokens: 5 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			now: () => 1000,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-metrics-1",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const metrics = store.metricsData.get("conv-metrics-1");
-		expect(metrics).toBeDefined();
-		expect(metrics).toHaveLength(1);
-		expect(metrics?.[0]?.turnId).toMatch(/^turn-/);
-		expect(metrics?.[0]?.usage.inputTokens).toBe(10);
-		expect(metrics?.[0]?.usage.outputTokens).toBe(5);
-		expect(metrics?.[0]?.steps).toHaveLength(1);
-		expect(metrics?.[0]?.steps[0]?.usage.inputTokens).toBe(10);
-		expect(metrics?.[0]?.steps[0]?.usage.outputTokens).toBe(5);
-	});
-
-	it("TurnMetrics aggregates multi-step usage and carries each step's StepMetrics in order", async () => {
-		const store = createInMemoryStore();
-		const tool = createFakeTool("echo", async () => ({ content: "echoed" }));
-
-		let callIndex = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				const idx = callIndex++;
-				return (async function* () {
-					if (idx === 0) {
-						yield {
-							type: "tool-call",
-							toolCallId: "tc1",
-							toolName: "echo",
-							input: {},
-						} as ProviderEvent;
-						yield {
-							type: "usage",
-							usage: { inputTokens: 10, outputTokens: 5 },
-						} as ProviderEvent;
-						yield { type: "finish", reason: "tool-calls" } as ProviderEvent;
-					} else {
-						yield { type: "text-delta", delta: "Step2" } as ProviderEvent;
-						yield {
-							type: "usage",
-							usage: { inputTokens: 20, outputTokens: 10 },
-						} as ProviderEvent;
-						yield { type: "finish", reason: "stop" } as ProviderEvent;
-					}
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [tool],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			now: () => 1000,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-metrics-multi",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const metrics = store.metricsData.get("conv-metrics-multi");
-		expect(metrics).toBeDefined();
-		expect(metrics).toHaveLength(1);
-
-		const tm = metrics?.[0];
-		if (tm === undefined) throw new Error("expected metrics");
-
-		expect(tm.steps.length).toBeGreaterThanOrEqual(2);
-
-		expect(tm.steps[0]?.usage.inputTokens).toBe(10);
-		expect(tm.steps[0]?.usage.outputTokens).toBe(5);
-		expect(tm.steps[1]?.usage.inputTokens).toBe(20);
-		expect(tm.steps[1]?.usage.outputTokens).toBe(10);
-
-		expect(tm.usage.inputTokens).toBe(30);
-		expect(tm.usage.outputTokens).toBe(15);
-	});
-
-	it("per-step timing and usage are joined by stepId into one StepMetrics", async () => {
-		const store = createInMemoryStore();
-		const clock = createCounterNow();
-		clock.tick(100);
-
-		let callIndex = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				const idx = callIndex++;
-				return (async function* () {
-					if (idx === 0) {
-						clock.tick(50);
-						yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
-						clock.tick(100);
-						yield {
-							type: "usage",
-							usage: { inputTokens: 10, outputTokens: 5 },
-						} as ProviderEvent;
-						clock.tick(50);
-						yield { type: "finish", reason: "stop" } as ProviderEvent;
-					}
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			now: clock.now,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-metrics-join",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const metrics = store.metricsData.get("conv-metrics-join");
-		expect(metrics).toBeDefined();
-		expect(metrics).toHaveLength(1);
-
-		const tm = metrics?.[0];
-		if (tm === undefined) throw new Error("expected metrics");
-
-		expect(tm.steps).toHaveLength(1);
-		const step = tm.steps[0];
-		if (step === undefined) throw new Error("expected step");
-
-		expect(step.usage.inputTokens).toBe(10);
-		expect(step.usage.outputTokens).toBe(5);
-		expect(step.genTotalMs).toBe(200);
-		expect(step.ttftMs).toBe(50);
-		expect(step.decodeMs).toBe(150);
-	});
-
-	it("turn-level usage comes from the done event aggregate", async () => {
-		const store = createInMemoryStore();
-		const tool = createFakeTool("echo", async () => ({ content: "echoed" }));
-
-		let callIndex = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				const idx = callIndex++;
-				return (async function* () {
-					if (idx === 0) {
-						yield {
-							type: "tool-call",
-							toolCallId: "tc1",
-							toolName: "echo",
-							input: {},
-						} as ProviderEvent;
-						yield {
-							type: "usage",
-							usage: { inputTokens: 10, outputTokens: 5 },
-						} as ProviderEvent;
-						yield { type: "finish", reason: "tool-calls" } as ProviderEvent;
-					} else {
-						yield { type: "text-delta", delta: "Step2" } as ProviderEvent;
-						yield {
-							type: "usage",
-							usage: { inputTokens: 20, outputTokens: 10 },
-						} as ProviderEvent;
-						yield { type: "finish", reason: "stop" } as ProviderEvent;
-					}
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [tool],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			now: () => 1000,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-metrics-done",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const metrics = store.metricsData.get("conv-metrics-done");
-		expect(metrics).toBeDefined();
-		expect(metrics).toHaveLength(1);
-
-		const tm = metrics?.[0];
-		if (tm === undefined) throw new Error("expected metrics");
-
-		expect(tm.usage.inputTokens).toBe(30);
-		expect(tm.usage.outputTokens).toBe(15);
-	});
-
-	it("persists contextSize as the last step's inputTokens + outputTokens", async () => {
-		const store = createInMemoryStore();
-		const tool = createFakeTool("echo", async () => ({ content: "echoed" }));
-
-		let callIndex = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				const idx = callIndex++;
-				return (async function* () {
-					if (idx === 0) {
-						yield {
-							type: "tool-call",
-							toolCallId: "tc1",
-							toolName: "echo",
-							input: {},
-						} as ProviderEvent;
-						yield {
-							type: "usage",
-							usage: { inputTokens: 10, outputTokens: 5 },
-						} as ProviderEvent;
-						yield { type: "finish", reason: "tool-calls" } as ProviderEvent;
-					} else {
-						yield { type: "text-delta", delta: "Step2" } as ProviderEvent;
-						yield {
-							type: "usage",
-							usage: { inputTokens: 20, outputTokens: 10 },
-						} as ProviderEvent;
-						yield { type: "finish", reason: "stop" } as ProviderEvent;
-					}
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [tool],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			now: () => 1000,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-context-size",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const metrics = store.metricsData.get("conv-context-size");
-		expect(metrics).toBeDefined();
-		expect(metrics).toHaveLength(1);
-
-		const tm = metrics?.[0];
-		if (tm === undefined) throw new Error("expected metrics");
-
-		expect(tm.steps.length).toBeGreaterThanOrEqual(2);
-		expect(tm.contextSize).toBe(30);
-	});
-
-	it("does not persist metrics nor emit turn-sealed when chunk append fails", async () => {
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		let metricsAppended = false;
-		const failingMetricsStore: ConversationStore = {
-			async append() {
-				throw new Error("storage failure");
-			},
-			async load() {
-				return [];
-			},
-			async loadSince() {
-				return [];
-			},
-			async appendMetrics() {
-				metricsAppended = true;
-			},
-			async loadMetrics() {
-				return [];
-			},
-			async getCwd() {
-				return null;
-			},
-			async setCwd() {},
-			async clearCwd() {},
-			async getComputerId() {
-				return null;
-			},
-			async setComputerId() {},
-			async clearComputerId() {},
-			async getReasoningEffort() {
-				return null;
-			},
-			async setReasoningEffort() {},
-			async getModel() {
-				return null;
-			},
-			async setModel() {},
-			async listConversations() {
-				return [];
-			},
-			async getConversationMeta() {
-				return null;
-			},
-			async setConversationTitle() {},
-			async getConversationStatus() {
-				return null;
-			},
-			async setConversationStatus() {},
-			async replaceHistory() {},
-			async getCompactPercent() {
-				return null;
-			},
-			async setCompactPercent() {},
-			async forkHistory() {},
-			async setCompactedFrom() {},
-			async getWorkspace() {
-				return null;
-			},
-			async ensureWorkspace(id) {
-				return {
-					id,
-					title: id,
-					defaultCwd: null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceTitle(id, title) {
-				return {
-					id,
-					title,
-					defaultCwd: null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceDefaultCwd(id, defaultCwd) {
-				return {
-					id,
-					title: id,
-					defaultCwd,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceDefaultComputerId(id, defaultComputerId) {
-				return {
-					id,
-					title: id,
-					defaultCwd: null,
-					defaultComputerId,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async deleteWorkspace() {
-				return { closedCount: 0 };
-			},
-			async listWorkspaces() {
-				return [];
-			},
-			async getWorkspaceId() {
-				return "default";
-			},
-			async setWorkspaceId() {},
-			async getEffectiveCwd() {
-				return null;
-			},
-			async getEffectiveComputer() {
-				return null;
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: failingMetricsStore,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const { events, onEvent } = collectEvents();
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-fail-metrics",
-			text: "test",
-			onEvent,
-		});
-
-		const sealedEvents = events.filter((e) => e.type === "turn-sealed");
-		expect(sealedEvents).toHaveLength(0);
-		expect(metricsAppended).toBe(false);
-
-		const errorEvents = events.filter((e) => e.type === "error");
-		expect(errorEvents).toHaveLength(1);
-	});
+  it("persists a TurnMetrics after a single-step turn seals", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "usage", usage: { inputTokens: 10, outputTokens: 5 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      now: () => 1000,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-metrics-1",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const metrics = store.metricsData.get("conv-metrics-1");
+    expect(metrics).toBeDefined();
+    expect(metrics).toHaveLength(1);
+    expect(metrics?.[0]?.turnId).toMatch(/^turn-/);
+    expect(metrics?.[0]?.usage.inputTokens).toBe(10);
+    expect(metrics?.[0]?.usage.outputTokens).toBe(5);
+    expect(metrics?.[0]?.steps).toHaveLength(1);
+    expect(metrics?.[0]?.steps[0]?.usage.inputTokens).toBe(10);
+    expect(metrics?.[0]?.steps[0]?.usage.outputTokens).toBe(5);
+  });
+
+  it("TurnMetrics aggregates multi-step usage and carries each step's StepMetrics in order", async () => {
+    const store = createInMemoryStore();
+    const tool = createFakeTool("echo", async () => ({ content: "echoed" }));
+
+    let callIndex = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        const idx = callIndex++;
+        return (async function* () {
+          if (idx === 0) {
+            yield {
+              type: "tool-call",
+              toolCallId: "tc1",
+              toolName: "echo",
+              input: {},
+            } as ProviderEvent;
+            yield {
+              type: "usage",
+              usage: { inputTokens: 10, outputTokens: 5 },
+            } as ProviderEvent;
+            yield { type: "finish", reason: "tool-calls" } as ProviderEvent;
+          } else {
+            yield { type: "text-delta", delta: "Step2" } as ProviderEvent;
+            yield {
+              type: "usage",
+              usage: { inputTokens: 20, outputTokens: 10 },
+            } as ProviderEvent;
+            yield { type: "finish", reason: "stop" } as ProviderEvent;
+          }
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [tool],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      now: () => 1000,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-metrics-multi",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const metrics = store.metricsData.get("conv-metrics-multi");
+    expect(metrics).toBeDefined();
+    expect(metrics).toHaveLength(1);
+
+    const tm = metrics?.[0];
+    if (tm === undefined) throw new Error("expected metrics");
+
+    expect(tm.steps.length).toBeGreaterThanOrEqual(2);
+
+    expect(tm.steps[0]?.usage.inputTokens).toBe(10);
+    expect(tm.steps[0]?.usage.outputTokens).toBe(5);
+    expect(tm.steps[1]?.usage.inputTokens).toBe(20);
+    expect(tm.steps[1]?.usage.outputTokens).toBe(10);
+
+    expect(tm.usage.inputTokens).toBe(30);
+    expect(tm.usage.outputTokens).toBe(15);
+  });
+
+  it("per-step timing and usage are joined by stepId into one StepMetrics", async () => {
+    const store = createInMemoryStore();
+    const clock = createCounterNow();
+    clock.tick(100);
+
+    let callIndex = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        const idx = callIndex++;
+        return (async function* () {
+          if (idx === 0) {
+            clock.tick(50);
+            yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
+            clock.tick(100);
+            yield {
+              type: "usage",
+              usage: { inputTokens: 10, outputTokens: 5 },
+            } as ProviderEvent;
+            clock.tick(50);
+            yield { type: "finish", reason: "stop" } as ProviderEvent;
+          }
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      now: clock.now,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-metrics-join",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const metrics = store.metricsData.get("conv-metrics-join");
+    expect(metrics).toBeDefined();
+    expect(metrics).toHaveLength(1);
+
+    const tm = metrics?.[0];
+    if (tm === undefined) throw new Error("expected metrics");
+
+    expect(tm.steps).toHaveLength(1);
+    const step = tm.steps[0];
+    if (step === undefined) throw new Error("expected step");
+
+    expect(step.usage.inputTokens).toBe(10);
+    expect(step.usage.outputTokens).toBe(5);
+    expect(step.genTotalMs).toBe(200);
+    expect(step.ttftMs).toBe(50);
+    expect(step.decodeMs).toBe(150);
+  });
+
+  it("turn-level usage comes from the done event aggregate", async () => {
+    const store = createInMemoryStore();
+    const tool = createFakeTool("echo", async () => ({ content: "echoed" }));
+
+    let callIndex = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        const idx = callIndex++;
+        return (async function* () {
+          if (idx === 0) {
+            yield {
+              type: "tool-call",
+              toolCallId: "tc1",
+              toolName: "echo",
+              input: {},
+            } as ProviderEvent;
+            yield {
+              type: "usage",
+              usage: { inputTokens: 10, outputTokens: 5 },
+            } as ProviderEvent;
+            yield { type: "finish", reason: "tool-calls" } as ProviderEvent;
+          } else {
+            yield { type: "text-delta", delta: "Step2" } as ProviderEvent;
+            yield {
+              type: "usage",
+              usage: { inputTokens: 20, outputTokens: 10 },
+            } as ProviderEvent;
+            yield { type: "finish", reason: "stop" } as ProviderEvent;
+          }
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [tool],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      now: () => 1000,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-metrics-done",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const metrics = store.metricsData.get("conv-metrics-done");
+    expect(metrics).toBeDefined();
+    expect(metrics).toHaveLength(1);
+
+    const tm = metrics?.[0];
+    if (tm === undefined) throw new Error("expected metrics");
+
+    expect(tm.usage.inputTokens).toBe(30);
+    expect(tm.usage.outputTokens).toBe(15);
+  });
+
+  it("persists contextSize as the last step's inputTokens + outputTokens", async () => {
+    const store = createInMemoryStore();
+    const tool = createFakeTool("echo", async () => ({ content: "echoed" }));
+
+    let callIndex = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        const idx = callIndex++;
+        return (async function* () {
+          if (idx === 0) {
+            yield {
+              type: "tool-call",
+              toolCallId: "tc1",
+              toolName: "echo",
+              input: {},
+            } as ProviderEvent;
+            yield {
+              type: "usage",
+              usage: { inputTokens: 10, outputTokens: 5 },
+            } as ProviderEvent;
+            yield { type: "finish", reason: "tool-calls" } as ProviderEvent;
+          } else {
+            yield { type: "text-delta", delta: "Step2" } as ProviderEvent;
+            yield {
+              type: "usage",
+              usage: { inputTokens: 20, outputTokens: 10 },
+            } as ProviderEvent;
+            yield { type: "finish", reason: "stop" } as ProviderEvent;
+          }
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [tool],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      now: () => 1000,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-context-size",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const metrics = store.metricsData.get("conv-context-size");
+    expect(metrics).toBeDefined();
+    expect(metrics).toHaveLength(1);
+
+    const tm = metrics?.[0];
+    if (tm === undefined) throw new Error("expected metrics");
+
+    expect(tm.steps.length).toBeGreaterThanOrEqual(2);
+    expect(tm.contextSize).toBe(30);
+  });
+
+  it("does not persist metrics nor emit turn-sealed when chunk append fails", async () => {
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    let metricsAppended = false;
+    const failingMetricsStore: ConversationStore = {
+      async append() {
+        throw new Error("storage failure");
+      },
+      async load() {
+        return [];
+      },
+      async loadSince() {
+        return [];
+      },
+      async appendMetrics() {
+        metricsAppended = true;
+      },
+      async loadMetrics() {
+        return [];
+      },
+      async getCwd() {
+        return null;
+      },
+      async setCwd() {},
+      async clearCwd() {},
+      async getComputerId() {
+        return null;
+      },
+      async setComputerId() {},
+      async clearComputerId() {},
+      async getReasoningEffort() {
+        return null;
+      },
+      async setReasoningEffort() {},
+      async getModel() {
+        return null;
+      },
+      async setModel() {},
+      async listConversations() {
+        return [];
+      },
+      async getConversationMeta() {
+        return null;
+      },
+      async setConversationTitle() {},
+      async getConversationStatus() {
+        return null;
+      },
+      async setConversationStatus() {},
+      async replaceHistory() {},
+      async getCompactPercent() {
+        return null;
+      },
+      async setCompactPercent() {},
+      async forkHistory() {},
+      async setCompactedFrom() {},
+      async getWorkspace() {
+        return null;
+      },
+      async ensureWorkspace(id) {
+        return {
+          id,
+          title: id,
+          defaultCwd: null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceTitle(id, title) {
+        return {
+          id,
+          title,
+          defaultCwd: null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceDefaultCwd(id, defaultCwd) {
+        return {
+          id,
+          title: id,
+          defaultCwd,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceDefaultComputerId(id, defaultComputerId) {
+        return {
+          id,
+          title: id,
+          defaultCwd: null,
+          defaultComputerId,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async deleteWorkspace() {
+        return { closedCount: 0 };
+      },
+      async listWorkspaces() {
+        return [];
+      },
+      async getWorkspaceId() {
+        return "default";
+      },
+      async setWorkspaceId() {},
+      async getEffectiveCwd() {
+        return null;
+      },
+      async getEffectiveComputer() {
+        return null;
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: failingMetricsStore,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const { events, onEvent } = collectEvents();
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-fail-metrics",
+      text: "test",
+      onEvent,
+    });
+
+    const sealedEvents = events.filter((e) => e.type === "turn-sealed");
+    expect(sealedEvents).toHaveLength(0);
+    expect(metricsAppended).toBe(false);
+
+    const errorEvents = events.filter((e) => e.type === "error");
+    expect(errorEvents).toHaveLength(1);
+  });
 });
 
 describe("tools filter", () => {
-	it("applies the tools filter once and passes the result to runTurn", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const toolA = createFakeTool("tool-a", async () => ({ content: "a" }));
-		const toolB = createFakeTool("tool-b", async () => ({ content: "b" }));
-
-		let filterCallCount = 0;
-		const transformingFilter = (assembly: ToolAssembly): Promise<ToolAssembly> => {
-			filterCallCount++;
-			return Promise.resolve({ ...assembly, tools: [toolB] });
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [toolA],
-			applyToolsFilter: transformingFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-filter-once",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(filterCallCount).toBe(1);
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.tools).toHaveLength(1);
-		expect(captured[0]?.tools[0]?.name).toBe("tool-b");
-	});
-
-	it("tools filter identity is a no-op (same tools reach runTurn)", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const toolA = createFakeTool("tool-a", async () => ({ content: "a" }));
-		const toolB = createFakeTool("tool-b", async () => ({ content: "b" }));
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [toolA, toolB],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-filter-identity",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.tools).toHaveLength(2);
-		expect(captured[0]?.tools[0]?.name).toBe("tool-a");
-		expect(captured[0]?.tools[1]?.name).toBe("tool-b");
-	});
-
-	it("threads cwd and conversationId into the tool assembly", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captureRunTurn } = createCapturingRunTurn();
-
-		let receivedAssembly: ToolAssembly | undefined;
-		const capturingFilter = (assembly: ToolAssembly): Promise<ToolAssembly> => {
-			receivedAssembly = assembly;
-			return Promise.resolve(assembly);
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: capturingFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-filter-threads",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "/test/dir",
-		});
-
-		expect(receivedAssembly).toBeDefined();
-		expect(receivedAssembly?.conversationId).toBe("conv-filter-threads");
-		expect(receivedAssembly?.cwd).toBe("/test/dir");
-		expect(receivedAssembly?.tools).toEqual([]);
-	});
+  it("applies the tools filter once and passes the result to runTurn", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const toolA = createFakeTool("tool-a", async () => ({ content: "a" }));
+    const toolB = createFakeTool("tool-b", async () => ({ content: "b" }));
+
+    let filterCallCount = 0;
+    const transformingFilter = (assembly: ToolAssembly): Promise<ToolAssembly> => {
+      filterCallCount++;
+      return Promise.resolve({ ...assembly, tools: [toolB] });
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [toolA],
+      applyToolsFilter: transformingFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-filter-once",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(filterCallCount).toBe(1);
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.tools).toHaveLength(1);
+    expect(captured[0]?.tools[0]?.name).toBe("tool-b");
+  });
+
+  it("tools filter identity is a no-op (same tools reach runTurn)", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const toolA = createFakeTool("tool-a", async () => ({ content: "a" }));
+    const toolB = createFakeTool("tool-b", async () => ({ content: "b" }));
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [toolA, toolB],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-filter-identity",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.tools).toHaveLength(2);
+    expect(captured[0]?.tools[0]?.name).toBe("tool-a");
+    expect(captured[0]?.tools[1]?.name).toBe("tool-b");
+  });
+
+  it("threads cwd and conversationId into the tool assembly", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captureRunTurn } = createCapturingRunTurn();
+
+    let receivedAssembly: ToolAssembly | undefined;
+    const capturingFilter = (assembly: ToolAssembly): Promise<ToolAssembly> => {
+      receivedAssembly = assembly;
+      return Promise.resolve(assembly);
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: capturingFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-filter-threads",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "/test/dir",
+    });
+
+    expect(receivedAssembly).toBeDefined();
+    expect(receivedAssembly?.conversationId).toBe("conv-filter-threads");
+    expect(receivedAssembly?.cwd).toBe("/test/dir");
+    expect(receivedAssembly?.tools).toEqual([]);
+  });
 });
 
 function createCounterNow(): { now: () => number; tick: (ms: number) => void } {
-	let t = 0;
-	return {
-		now: () => t,
-		tick(ms: number) {
-			t += ms;
-		},
-	};
+  let t = 0;
+  return {
+    now: () => t,
+    tick(ms: number) {
+      t += ms;
+    },
+  };
 }
 
 describe("lifecycle event hooks", () => {
-	it("emits turnStarted before and turnSettled after a turn", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const emitted: Array<{ hook: string; payload: TurnLifecyclePayload; order: number }> = [];
-		let order = 0;
-
-		const fakeEmit = <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload): void => {
-			emitted.push({ hook: hook.id, payload: payload as TurnLifecyclePayload, order: order++ });
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: fakeEmit,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-lifecycle",
-			text: "test",
-			onEvent: () => {},
-			cwd: "/work",
-			modelName: "mymodel",
-		});
-
-		// The status-changed emits resolve the persisted workspace id async
-		// (getWorkspaceId) before firing, so they may land after turn-settled
-		// in microtask order. Flush all pending microtasks so every emit has
-		// landed, then assert by hook identity rather than strict index order.
-		await new Promise((resolve) => setImmediate(resolve));
-
-		expect(emitted).toHaveLength(4);
-
-		const started = emitted.find((e) => e.hook === "session-orchestrator/turn-started");
-		const settled = emitted.find((e) => e.hook === "session-orchestrator/turn-settled");
-		const statusChanges = emitted.filter(
-			(e) => e.hook === "session-orchestrator/conversation-status-changed",
-		);
-
-		expect(started).toBeDefined();
-		expect(started?.payload.conversationId).toBe("conv-lifecycle");
-		expect(started?.payload.cwd).toBe("/work");
-		expect(started?.payload.modelName).toBe("mymodel");
-		// turn-started is the FIRST emit (synchronous, before any async deferral).
-		expect(started?.order).toBe(0);
-
-		expect(settled).toBeDefined();
-		expect(settled?.payload.conversationId).toBe("conv-lifecycle");
-		expect(settled?.payload.cwd).toBe("/work");
-		expect(settled?.payload.modelName).toBe("mymodel");
-		// turn-started precedes turn-settled.
-		expect(started?.order).toBeLessThan(settled?.order ?? Infinity);
-
-		expect(statusChanges).toHaveLength(2);
-		const activeChange = statusChanges.find(
-			(e) => (e.payload as unknown as { status: string }).status === "active",
-		);
-		const idleChange = statusChanges.find(
-			(e) => (e.payload as unknown as { status: string }).status === "idle",
-		);
-		expect(activeChange).toBeDefined();
-		expect(idleChange).toBeDefined();
-		// Both status-changed payloads now carry the persisted workspace id.
-		expect((activeChange?.payload as unknown as { workspaceId: string }).workspaceId).toBe(
-			"default",
-		);
-		expect((idleChange?.payload as unknown as { workspaceId: string }).workspaceId).toBe("default");
-	});
+  it("emits turnStarted before and turnSettled after a turn", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const emitted: Array<{ hook: string; payload: TurnLifecyclePayload; order: number }> = [];
+    let order = 0;
+
+    const fakeEmit = <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload): void => {
+      emitted.push({ hook: hook.id, payload: payload as TurnLifecyclePayload, order: order++ });
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: fakeEmit,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-lifecycle",
+      text: "test",
+      onEvent: () => {},
+      cwd: "/work",
+      modelName: "mymodel",
+    });
+
+    // The status-changed emits resolve the persisted workspace id async
+    // (getWorkspaceId) before firing, so they may land after turn-settled
+    // in microtask order. Flush all pending microtasks so every emit has
+    // landed, then assert by hook identity rather than strict index order.
+    await new Promise((resolve) => setImmediate(resolve));
+
+    expect(emitted).toHaveLength(4);
+
+    const started = emitted.find((e) => e.hook === "session-orchestrator/turn-started");
+    const settled = emitted.find((e) => e.hook === "session-orchestrator/turn-settled");
+    const statusChanges = emitted.filter(
+      (e) => e.hook === "session-orchestrator/conversation-status-changed",
+    );
+
+    expect(started).toBeDefined();
+    expect(started?.payload.conversationId).toBe("conv-lifecycle");
+    expect(started?.payload.cwd).toBe("/work");
+    expect(started?.payload.modelName).toBe("mymodel");
+    // turn-started is the FIRST emit (synchronous, before any async deferral).
+    expect(started?.order).toBe(0);
+
+    expect(settled).toBeDefined();
+    expect(settled?.payload.conversationId).toBe("conv-lifecycle");
+    expect(settled?.payload.cwd).toBe("/work");
+    expect(settled?.payload.modelName).toBe("mymodel");
+    // turn-started precedes turn-settled.
+    expect(started?.order).toBeLessThan(settled?.order ?? Infinity);
+
+    expect(statusChanges).toHaveLength(2);
+    const activeChange = statusChanges.find(
+      (e) => (e.payload as unknown as { status: string }).status === "active",
+    );
+    const idleChange = statusChanges.find(
+      (e) => (e.payload as unknown as { status: string }).status === "idle",
+    );
+    expect(activeChange).toBeDefined();
+    expect(idleChange).toBeDefined();
+    // Both status-changed payloads now carry the persisted workspace id.
+    expect((activeChange?.payload as unknown as { workspaceId: string }).workspaceId).toBe(
+      "default",
+    );
+    expect((idleChange?.payload as unknown as { workspaceId: string }).workspaceId).toBe("default");
+  });
 });
 
 describe("warm service", () => {
-	it("warm reuses the assembled tools + full history and appends the probe turn", async () => {
-		const store = createInMemoryStore();
-		const existingMsg: ChatMessage = {
-			role: "user",
-			chunks: [{ type: "text", text: "existing" }],
-		};
-		const assistantMsg: ChatMessage = {
-			role: "assistant",
-			chunks: [{ type: "text", text: "reply" }],
-		};
-		await store.append("conv-warm-reuse", [existingMsg, assistantMsg]);
-
-		let capturedMessages: readonly ChatMessage[] | undefined;
-		let capturedTools: readonly ToolContract[] | undefined;
-		let _capturedOpts: unknown;
-
-		const toolA = createFakeTool("tool-a", async () => ({ content: "a" }));
-
-		const provider: ProviderContract = {
-			id: "warm-provider",
-			stream(messages, tools, opts) {
-				capturedMessages = messages;
-				capturedTools = tools;
-				_capturedOpts = opts;
-				return (async function* () {
-					yield {
-						type: "usage",
-						usage: { inputTokens: 100, outputTokens: 5, cacheReadTokens: 80, cacheWriteTokens: 20 },
-					} as ProviderEvent;
-					yield { type: "finish", reason: "stop" } as ProviderEvent;
-				})();
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [toolA],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: () => {},
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		const result = await warmService.warm("conv-warm-reuse", { cwd: "/test" });
-
-		expect(capturedMessages).toBeDefined();
-		expect(capturedMessages).toHaveLength(3);
-		expect(capturedMessages?.[0]?.chunks[0]).toEqual({ type: "text", text: "existing" });
-		expect(capturedMessages?.[1]?.chunks[0]).toEqual({ type: "text", text: "reply" });
-		expect(capturedMessages?.[2]?.role).toBe("user");
-		expect((capturedMessages?.[2]?.chunks[0] as { type: "text"; text: string }).text).toBe(
-			"reply with just a .",
-		);
-
-		expect(capturedTools).toHaveLength(1);
-		expect(capturedTools?.[0]?.name).toBe("tool-a");
-
-		if ("inputTokens" in result) {
-			expect(result.inputTokens).toBe(100);
-			expect(result.cacheReadTokens).toBe(80);
-		}
-	});
-
-	it("warm forwards a `warm`-flagged logger so the send is captured as a span", async () => {
-		const store = createInMemoryStore();
-		await store.append("conv-warm-log", [{ role: "user", chunks: [{ type: "text", text: "hi" }] }]);
-
-		let capturedOpts: ProviderStreamOptions | undefined;
-		const provider: ProviderContract = {
-			id: "p",
-			stream(_messages, _tools, opts) {
-				capturedOpts = opts;
-				return (async function* () {
-					yield {
-						type: "usage",
-						usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
-					} as ProviderEvent;
-				})();
-			},
-		};
-
-		// Minimal Logger stub recording the child() correlation it was asked for.
-		let childArg: (Partial<{ conversationId: string }> & { attrs?: unknown }) | undefined;
-		const warmChild = { __warmChild: true } as unknown as Logger;
-		const logger = {
-			debug() {},
-			info() {},
-			warn() {},
-			error() {},
-			span() {
-				throw new Error("warm should not open spans directly");
-			},
-			child(ctx: { conversationId?: string; attrs?: unknown }) {
-				childArg = ctx;
-				return warmChild;
-			},
-		} as unknown as Logger;
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: () => {},
-			logger,
-		};
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		await warmService.warm("conv-warm-log");
-
-		// The warm send must carry the logger so the provider opens a provider.request span.
-		expect(capturedOpts?.logger).toBe(warmChild);
-		// …and it must be flagged warm + correlated to the conversation, so it can be
-		// diffed against the real turn's request (the 0%-cache debugging workflow).
-		expect(childArg).toMatchObject({
-			conversationId: "conv-warm-log",
-			attrs: { warm: true },
-		});
-	});
-
-	it("warm falls back to the conversation's stored cwd for tool assembly", async () => {
-		// A cwd-sensitive tools filter (e.g. skill discovery) must see the SAME cwd
-		// the real turn used, or the tools block diverges and the prompt cache misses.
-		// A manual reheat sends no cwd, so the warm must fall back to the stored cwd.
-		const store = createInMemoryStore();
-		await store.append("conv-warm-cwd", [{ role: "user", chunks: [{ type: "text", text: "hi" }] }]);
-		await store.setCwd("conv-warm-cwd", "/home/tradam/projects/roblox");
-
-		let assemblyCwd: string | undefined = "UNSET";
-		const provider: ProviderContract = {
-			id: "p",
-			stream() {
-				return (async function* () {
-					yield {
-						type: "usage",
-						usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
-					} as ProviderEvent;
-				})();
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: (assembly: ToolAssembly) => {
-				assemblyCwd = assembly.cwd;
-				return Promise.resolve(assembly);
-			},
-			runTurn,
-			emit: () => {},
-		};
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		// No cwd in opts (the reheat case) → must use the stored cwd.
-		await warmService.warm("conv-warm-cwd");
-		expect(assemblyCwd).toBe("/home/tradam/projects/roblox");
-	});
-
-	it("warm refuses while the conversation is generating", async () => {
-		const store = createInMemoryStore();
-		let resolveRunTurn: (() => void) | undefined;
-		const runTurnBlocker = new Promise<void>((resolve) => {
-			resolveRunTurn = resolve;
-		});
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield { type: "text-delta", delta: "slow" } as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
-			await runTurnBlocker;
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: blockingRunTurn,
-			emit: () => {},
-		};
-
-		const { orchestrator, activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		const turnPromise = orchestrator.handleMessage({
-			conversationId: "conv-blocking",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const warmResult = await warmService.warm("conv-blocking");
-		expect(warmResult).toEqual({ error: "conversation is generating" });
-
-		resolveRunTurn?.();
-		await turnPromise;
-	});
-
-	it("warm never persists (no append) and emits no AgentEvents", async () => {
-		const store = createInMemoryStore();
-		const existingMsg: ChatMessage = {
-			role: "user",
-			chunks: [{ type: "text", text: "existing" }],
-		};
-		await store.append("conv-no-persist", [existingMsg]);
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield {
-					type: "usage",
-					usage: { inputTokens: 10, outputTokens: 2 },
-				} as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: () => {},
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		const sizeBefore = store.data.get("conv-no-persist")?.length;
-
-		await warmService.warm("conv-no-persist");
-
-		const sizeAfter = store.data.get("conv-no-persist")?.length;
-		expect(sizeAfter).toBe(sizeBefore);
-	});
-
-	it("warm returns provider usage (input + cacheReadTokens)", async () => {
-		const store = createInMemoryStore();
-		const existingMsg: ChatMessage = {
-			role: "user",
-			chunks: [{ type: "text", text: "existing" }],
-		};
-		await store.append("conv-usage", [existingMsg]);
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield {
-					type: "usage",
-					usage: {
-						inputTokens: 500,
-						outputTokens: 3,
-						cacheReadTokens: 400,
-						cacheWriteTokens: 100,
-					},
-				} as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: () => {},
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		const result = await warmService.warm("conv-usage");
-
-		expect(result).toEqual({
-			inputTokens: 500,
-			outputTokens: 3,
-			cacheReadTokens: 400,
-			cacheWriteTokens: 100,
-		});
-	});
-
-	it("warm emits warmCompleted with the usage on success", async () => {
-		const store = createInMemoryStore();
-		const existingMsg: ChatMessage = {
-			role: "user",
-			chunks: [{ type: "text", text: "existing" }],
-		};
-		await store.append("conv-warm-emit", [existingMsg]);
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield {
-					type: "usage",
-					usage: { inputTokens: 200, outputTokens: 10, cacheReadTokens: 150, cacheWriteTokens: 50 },
-				} as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const emitted: Array<{ hook: string; payload: WarmCompletedPayload }> = [];
-		const fakeEmit = <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload): void => {
-			emitted.push({ hook: hook.id, payload: payload as WarmCompletedPayload });
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: fakeEmit,
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		const result = await warmService.warm("conv-warm-emit");
-
-		if (!("inputTokens" in result)) throw new Error("expected success");
-
-		expect(emitted).toHaveLength(1);
-		expect(emitted[0]?.hook).toBe("session-orchestrator/warm-completed");
-		expect(emitted[0]?.payload.conversationId).toBe("conv-warm-emit");
-		expect(emitted[0]?.payload.usage).toEqual(result);
-	});
-
-	it("warm does NOT emit warmCompleted when it refuses (conversation generating / no history)", async () => {
-		const store = createInMemoryStore();
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield { type: "text-delta", delta: "slow" } as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const emitted: Array<{ hook: string }> = [];
-		const fakeEmit = <TPayload>(hook: EventHookDescriptor<TPayload>, _payload: TPayload): void => {
-			emitted.push({ hook: hook.id });
-		};
-
-		const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
-			await new Promise<void>((resolve) => setTimeout(resolve, 50));
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: blockingRunTurn,
-			emit: fakeEmit,
-		};
-
-		const { orchestrator, activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		// Refuse because conversation is generating
-		const turnPromise = orchestrator.handleMessage({
-			conversationId: "conv-refuse-gen",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const genResult = await warmService.warm("conv-refuse-gen");
-		expect(genResult).toEqual({ error: "conversation is generating" });
-
-		await turnPromise;
-
-		// Refuse because no history
-		const noHistResult = await warmService.warm("conv-refuse-empty");
-		expect(noHistResult).toEqual({ error: "no history" });
-
-		const warmEmits = emitted.filter((e) => e.hook === "session-orchestrator/warm-completed");
-		expect(warmEmits).toHaveLength(0);
-	});
+  it("warm reuses the assembled tools + full history and appends the probe turn", async () => {
+    const store = createInMemoryStore();
+    const existingMsg: ChatMessage = {
+      role: "user",
+      chunks: [{ type: "text", text: "existing" }],
+    };
+    const assistantMsg: ChatMessage = {
+      role: "assistant",
+      chunks: [{ type: "text", text: "reply" }],
+    };
+    await store.append("conv-warm-reuse", [existingMsg, assistantMsg]);
+
+    let capturedMessages: readonly ChatMessage[] | undefined;
+    let capturedTools: readonly ToolContract[] | undefined;
+    let _capturedOpts: unknown;
+
+    const toolA = createFakeTool("tool-a", async () => ({ content: "a" }));
+
+    const provider: ProviderContract = {
+      id: "warm-provider",
+      stream(messages, tools, opts) {
+        capturedMessages = messages;
+        capturedTools = tools;
+        _capturedOpts = opts;
+        return (async function* () {
+          yield {
+            type: "usage",
+            usage: { inputTokens: 100, outputTokens: 5, cacheReadTokens: 80, cacheWriteTokens: 20 },
+          } as ProviderEvent;
+          yield { type: "finish", reason: "stop" } as ProviderEvent;
+        })();
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [toolA],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: () => {},
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    const result = await warmService.warm("conv-warm-reuse", { cwd: "/test" });
+
+    expect(capturedMessages).toBeDefined();
+    expect(capturedMessages).toHaveLength(3);
+    expect(capturedMessages?.[0]?.chunks[0]).toEqual({ type: "text", text: "existing" });
+    expect(capturedMessages?.[1]?.chunks[0]).toEqual({ type: "text", text: "reply" });
+    expect(capturedMessages?.[2]?.role).toBe("user");
+    expect((capturedMessages?.[2]?.chunks[0] as { type: "text"; text: string }).text).toBe(
+      "reply with just a .",
+    );
+
+    expect(capturedTools).toHaveLength(1);
+    expect(capturedTools?.[0]?.name).toBe("tool-a");
+
+    if ("inputTokens" in result) {
+      expect(result.inputTokens).toBe(100);
+      expect(result.cacheReadTokens).toBe(80);
+    }
+  });
+
+  it("warm forwards a `warm`-flagged logger so the send is captured as a span", async () => {
+    const store = createInMemoryStore();
+    await store.append("conv-warm-log", [{ role: "user", chunks: [{ type: "text", text: "hi" }] }]);
+
+    let capturedOpts: ProviderStreamOptions | undefined;
+    const provider: ProviderContract = {
+      id: "p",
+      stream(_messages, _tools, opts) {
+        capturedOpts = opts;
+        return (async function* () {
+          yield {
+            type: "usage",
+            usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
+          } as ProviderEvent;
+        })();
+      },
+    };
+
+    // Minimal Logger stub recording the child() correlation it was asked for.
+    let childArg: (Partial<{ conversationId: string }> & { attrs?: unknown }) | undefined;
+    const warmChild = { __warmChild: true } as unknown as Logger;
+    const logger = {
+      debug() {},
+      info() {},
+      warn() {},
+      error() {},
+      span() {
+        throw new Error("warm should not open spans directly");
+      },
+      child(ctx: { conversationId?: string; attrs?: unknown }) {
+        childArg = ctx;
+        return warmChild;
+      },
+    } as unknown as Logger;
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: () => {},
+      logger,
+    };
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    await warmService.warm("conv-warm-log");
+
+    // The warm send must carry the logger so the provider opens a provider.request span.
+    expect(capturedOpts?.logger).toBe(warmChild);
+    // …and it must be flagged warm + correlated to the conversation, so it can be
+    // diffed against the real turn's request (the 0%-cache debugging workflow).
+    expect(childArg).toMatchObject({
+      conversationId: "conv-warm-log",
+      attrs: { warm: true },
+    });
+  });
+
+  it("warm falls back to the conversation's stored cwd for tool assembly", async () => {
+    // A cwd-sensitive tools filter (e.g. skill discovery) must see the SAME cwd
+    // the real turn used, or the tools block diverges and the prompt cache misses.
+    // A manual reheat sends no cwd, so the warm must fall back to the stored cwd.
+    const store = createInMemoryStore();
+    await store.append("conv-warm-cwd", [{ role: "user", chunks: [{ type: "text", text: "hi" }] }]);
+    await store.setCwd("conv-warm-cwd", "/home/tradam/projects/roblox");
+
+    let assemblyCwd: string | undefined = "UNSET";
+    const provider: ProviderContract = {
+      id: "p",
+      stream() {
+        return (async function* () {
+          yield {
+            type: "usage",
+            usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
+          } as ProviderEvent;
+        })();
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: (assembly: ToolAssembly) => {
+        assemblyCwd = assembly.cwd;
+        return Promise.resolve(assembly);
+      },
+      runTurn,
+      emit: () => {},
+    };
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    // No cwd in opts (the reheat case) → must use the stored cwd.
+    await warmService.warm("conv-warm-cwd");
+    expect(assemblyCwd).toBe("/home/tradam/projects/roblox");
+  });
+
+  it("warm refuses while the conversation is generating", async () => {
+    const store = createInMemoryStore();
+    let resolveRunTurn: (() => void) | undefined;
+    const runTurnBlocker = new Promise<void>((resolve) => {
+      resolveRunTurn = resolve;
+    });
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield { type: "text-delta", delta: "slow" } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
+      await runTurnBlocker;
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: blockingRunTurn,
+      emit: () => {},
+    };
+
+    const { orchestrator, activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    const turnPromise = orchestrator.handleMessage({
+      conversationId: "conv-blocking",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const warmResult = await warmService.warm("conv-blocking");
+    expect(warmResult).toEqual({ error: "conversation is generating" });
+
+    resolveRunTurn?.();
+    await turnPromise;
+  });
+
+  it("warm never persists (no append) and emits no AgentEvents", async () => {
+    const store = createInMemoryStore();
+    const existingMsg: ChatMessage = {
+      role: "user",
+      chunks: [{ type: "text", text: "existing" }],
+    };
+    await store.append("conv-no-persist", [existingMsg]);
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield {
+          type: "usage",
+          usage: { inputTokens: 10, outputTokens: 2 },
+        } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: () => {},
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    const sizeBefore = store.data.get("conv-no-persist")?.length;
+
+    await warmService.warm("conv-no-persist");
+
+    const sizeAfter = store.data.get("conv-no-persist")?.length;
+    expect(sizeAfter).toBe(sizeBefore);
+  });
+
+  it("warm returns provider usage (input + cacheReadTokens)", async () => {
+    const store = createInMemoryStore();
+    const existingMsg: ChatMessage = {
+      role: "user",
+      chunks: [{ type: "text", text: "existing" }],
+    };
+    await store.append("conv-usage", [existingMsg]);
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield {
+          type: "usage",
+          usage: {
+            inputTokens: 500,
+            outputTokens: 3,
+            cacheReadTokens: 400,
+            cacheWriteTokens: 100,
+          },
+        } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: () => {},
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    const result = await warmService.warm("conv-usage");
+
+    expect(result).toEqual({
+      inputTokens: 500,
+      outputTokens: 3,
+      cacheReadTokens: 400,
+      cacheWriteTokens: 100,
+    });
+  });
+
+  it("warm emits warmCompleted with the usage on success", async () => {
+    const store = createInMemoryStore();
+    const existingMsg: ChatMessage = {
+      role: "user",
+      chunks: [{ type: "text", text: "existing" }],
+    };
+    await store.append("conv-warm-emit", [existingMsg]);
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield {
+          type: "usage",
+          usage: { inputTokens: 200, outputTokens: 10, cacheReadTokens: 150, cacheWriteTokens: 50 },
+        } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const emitted: Array<{ hook: string; payload: WarmCompletedPayload }> = [];
+    const fakeEmit = <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload): void => {
+      emitted.push({ hook: hook.id, payload: payload as WarmCompletedPayload });
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: fakeEmit,
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    const result = await warmService.warm("conv-warm-emit");
+
+    if (!("inputTokens" in result)) throw new Error("expected success");
+
+    expect(emitted).toHaveLength(1);
+    expect(emitted[0]?.hook).toBe("session-orchestrator/warm-completed");
+    expect(emitted[0]?.payload.conversationId).toBe("conv-warm-emit");
+    expect(emitted[0]?.payload.usage).toEqual(result);
+  });
+
+  it("warm does NOT emit warmCompleted when it refuses (conversation generating / no history)", async () => {
+    const store = createInMemoryStore();
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield { type: "text-delta", delta: "slow" } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const emitted: Array<{ hook: string }> = [];
+    const fakeEmit = <TPayload>(hook: EventHookDescriptor<TPayload>, _payload: TPayload): void => {
+      emitted.push({ hook: hook.id });
+    };
+
+    const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
+      await new Promise<void>((resolve) => setTimeout(resolve, 50));
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: blockingRunTurn,
+      emit: fakeEmit,
+    };
+
+    const { orchestrator, activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    // Refuse because conversation is generating
+    const turnPromise = orchestrator.handleMessage({
+      conversationId: "conv-refuse-gen",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const genResult = await warmService.warm("conv-refuse-gen");
+    expect(genResult).toEqual({ error: "conversation is generating" });
+
+    await turnPromise;
+
+    // Refuse because no history
+    const noHistResult = await warmService.warm("conv-refuse-empty");
+    expect(noHistResult).toEqual({ error: "no history" });
+
+    const warmEmits = emitted.filter((e) => e.hook === "session-orchestrator/warm-completed");
+    expect(warmEmits).toHaveLength(0);
+  });
 });
 
 describe("cwd persistence", () => {
-	it("uses the persisted cwd when the request omits cwd", async () => {
-		const store = createInMemoryStore();
-		await store.setCwd("conv-persisted", "/persisted/dir");
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-persisted",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/persisted/dir");
-	});
-
-	it("persists the cwd when the request provides one (and a later cwd-less turn reuses it)", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-persist-new",
-			text: "first",
-			onEvent: () => {},
-			cwd: "/new/dir",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/new/dir");
-		expect(store.cwdData.get("conv-persist-new")).toBe("/new/dir");
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-persist-new",
-			text: "second",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(2);
-		expect(captured[1]?.cwd).toBe("/new/dir");
-	});
-
-	it("an explicit request cwd overrides the persisted cwd (and updates it)", async () => {
-		const store = createInMemoryStore();
-		await store.setCwd("conv-override", "/old/dir");
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-override",
-			text: "override",
-			onEvent: () => {},
-			cwd: "/new/dir",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/new/dir");
-		expect(store.cwdData.get("conv-override")).toBe("/new/dir");
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-override",
-			text: "reused",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(2);
-		expect(captured[1]?.cwd).toBe("/new/dir");
-	});
-
-	it("no cwd is threaded when neither request nor store has one", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-no-cwd-either",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBeUndefined();
-	});
+  it("uses the persisted cwd when the request omits cwd", async () => {
+    const store = createInMemoryStore();
+    await store.setCwd("conv-persisted", "/persisted/dir");
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-persisted",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/persisted/dir");
+  });
+
+  it("persists the cwd when the request provides one (and a later cwd-less turn reuses it)", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-persist-new",
+      text: "first",
+      onEvent: () => {},
+      cwd: "/new/dir",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/new/dir");
+    expect(store.cwdData.get("conv-persist-new")).toBe("/new/dir");
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-persist-new",
+      text: "second",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(2);
+    expect(captured[1]?.cwd).toBe("/new/dir");
+  });
+
+  it("an explicit request cwd overrides the persisted cwd (and updates it)", async () => {
+    const store = createInMemoryStore();
+    await store.setCwd("conv-override", "/old/dir");
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-override",
+      text: "override",
+      onEvent: () => {},
+      cwd: "/new/dir",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/new/dir");
+    expect(store.cwdData.get("conv-override")).toBe("/new/dir");
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-override",
+      text: "reused",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(2);
+    expect(captured[1]?.cwd).toBe("/new/dir");
+  });
+
+  it("no cwd is threaded when neither request nor store has one", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-no-cwd-either",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBeUndefined();
+  });
 });
 
 describe("detached turn hub", () => {
-	function waitForEvent(
-		orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
-		conversationId: string,
-		eventType: string,
-	): Promise<AgentEvent> {
-		return new Promise((resolve) => {
-			const unsub = orchestrator.subscribe(conversationId, (event) => {
-				if (event.type === eventType) {
-					unsub();
-					resolve(event);
-				}
-			});
-		});
-	}
-
-	it("subscribe-BEFORE-startTurn delivers — listener receives full ordered event sequence", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "text-delta", delta: " world" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-pre-sub", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-pre-sub", text: "Hi" });
-
-		const sealed = waitForEvent(orchestrator, "conv-pre-sub", "turn-sealed");
-		await sealed;
-
-		unsub();
-
-		expect(events.length).toBeGreaterThan(0);
-		const types = events.map((e) => e.type);
-		expect(types[0]).toBe("user-message");
-		expect(types[1]).toBe("turn-start");
-		expect(types).toContain("text-delta");
-		expect(types[types.length - 1]).toBe("turn-sealed");
-
-		const textDeltas = events.filter((e) => e.type === "text-delta");
-		expect(textDeltas).toHaveLength(2);
-	});
-
-	it("multi-subscriber fan-out (subscribed before start) — two listeners receive identical ordered events", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "text-delta", delta: " world" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const eventsA: AgentEvent[] = [];
-		const eventsB: AgentEvent[] = [];
-		const unsubA = orchestrator.subscribe("conv-fanout-pre", (e) => eventsA.push(e));
-		const unsubB = orchestrator.subscribe("conv-fanout-pre", (e) => eventsB.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-fanout-pre", text: "Hi" });
-
-		const sealed = waitForEvent(orchestrator, "conv-fanout-pre", "turn-sealed");
-		await sealed;
-
-		unsubA();
-		unsubB();
-
-		expect(eventsA.length).toBeGreaterThan(0);
-		expect(eventsA).toEqual(eventsB);
-
-		const types = eventsA.map((e) => e.type);
-		expect(types[0]).toBe("user-message");
-		expect(types[1]).toBe("turn-start");
-		expect(types[types.length - 1]).toBe("turn-sealed");
-	});
-
-	it("late-join replay — subscriber added mid-turn receives buffered events then live events, no gap/dup", async () => {
-		const store = createInMemoryStore();
-		let emitBarrierResolve: (() => void) | undefined;
-		const emitBarrier = new Promise<void>((resolve) => {
-			emitBarrierResolve = resolve;
-		});
-
-		let callIndex = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				const idx = callIndex++;
-				return (async function* () {
-					if (idx === 0) {
-						yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
-						yield { type: "text-delta", delta: " world" } as ProviderEvent;
-						await emitBarrier;
-						yield { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } } as ProviderEvent;
-						yield { type: "finish", reason: "stop" } as ProviderEvent;
-					}
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		orchestrator.startTurn({ conversationId: "conv-latejoin", text: "Hi" });
-
-		const earlyEvents: AgentEvent[] = [];
-		const unsubEarly = orchestrator.subscribe("conv-latejoin", (e) => earlyEvents.push(e));
-
-		await new Promise<void>((resolve) => setTimeout(resolve, 10));
-
-		const lateEvents: AgentEvent[] = [];
-		const unsubLate = orchestrator.subscribe("conv-latejoin", (e) => lateEvents.push(e));
-
-		const earlySnapshot = [...earlyEvents];
-		expect(earlySnapshot.length).toBeGreaterThanOrEqual(2);
-		expect(earlySnapshot.some((e) => e.type === "turn-start")).toBe(true);
-		expect(earlySnapshot.some((e) => e.type === "text-delta")).toBe(true);
-
-		expect(lateEvents.length).toBe(earlySnapshot.length);
-		expect(lateEvents).toEqual(earlySnapshot);
-
-		emitBarrierResolve?.();
-
-		const sealed = waitForEvent(orchestrator, "conv-latejoin", "turn-sealed");
-		await sealed;
-
-		unsubEarly();
-		unsubLate();
-
-		expect(earlyEvents.length).toBeGreaterThan(earlySnapshot.length);
-		expect(lateEvents.length).toBe(earlyEvents.length);
-		expect(lateEvents).toEqual(earlyEvents);
-	});
-
-	it("subscriber persists across turns — one subscriber receives events from two sequential turns", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Turn1" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-			[
-				{ type: "text-delta", delta: "Turn2" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const allEvents: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-persist", (e) => allEvents.push(e));
-
-		// First turn
-		orchestrator.startTurn({ conversationId: "conv-persist", text: "First" });
-		const sealed1 = waitForEvent(orchestrator, "conv-persist", "turn-sealed");
-		await sealed1;
-
-		// Second turn
-		orchestrator.startTurn({ conversationId: "conv-persist", text: "Second" });
-		const sealed2 = waitForEvent(orchestrator, "conv-persist", "turn-sealed");
-		await sealed2;
-
-		unsub();
-
-		const turnStarts = allEvents.filter((e) => e.type === "turn-start");
-		expect(turnStarts).toHaveLength(2);
-
-		const turnSealeds = allEvents.filter((e) => e.type === "turn-sealed");
-		expect(turnSealeds).toHaveLength(2);
-
-		const textDeltas = allEvents.filter((e) => e.type === "text-delta");
-		expect(textDeltas).toHaveLength(2);
-		expect((textDeltas[0] as AgentEvent & { type: "text-delta" }).delta).toBe("Turn1");
-		expect((textDeltas[1] as AgentEvent & { type: "text-delta" }).delta).toBe("Turn2");
-	});
-
-	it("detached completion — turn runs to completion with zero subscribers and persists", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const result = orchestrator.startTurn({ conversationId: "conv-detached", text: "Hi" });
-		expect(result.started).toBe(true);
-		const sealed = waitForEvent(orchestrator, "conv-detached", "turn-sealed");
-
-		await sealed;
-
-		const stored = store.data.get("conv-detached");
-		expect(stored).toBeDefined();
-		expect(stored).toHaveLength(2);
-		expect(stored?.[0]?.role).toBe("user");
-		expect(stored?.[1]?.role).toBe("assistant");
-	});
-
-	it("single-flight reject — startTurn while active returns already-active, no second turn", async () => {
-		const store = createInMemoryStore();
-		let resolveRunTurn: (() => void) | undefined;
-		const runTurnBlocker = new Promise<void>((resolve) => {
-			resolveRunTurn = resolve;
-		});
-
-		const provider: ProviderContract = {
-			id: "fake",
-			stream: async function* () {
-				yield { type: "text-delta", delta: "slow" } as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
-			await runTurnBlocker;
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: blockingRunTurn,
-		});
-
-		const first = orchestrator.startTurn({ conversationId: "conv-singleflight", text: "first" });
-		expect(first.started).toBe(true);
-		const sealed = waitForEvent(orchestrator, "conv-singleflight", "turn-sealed");
-
-		const second = orchestrator.startTurn({ conversationId: "conv-singleflight", text: "second" });
-		expect(second.started).toBe(false);
-		if (!second.started) {
-			expect(second.reason).toBe("already-active");
-		}
-
-		resolveRunTurn?.();
-		await sealed;
-
-		expect(store.data.get("conv-singleflight")?.length).toBe(2);
-	});
-
-	it("isActive false after seal — subscribe replays nothing after turn-sealed", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		expect(orchestrator.isActive("conv-cleared")).toBe(false);
-
-		orchestrator.startTurn({ conversationId: "conv-cleared", text: "test" });
-		const sealed = waitForEvent(orchestrator, "conv-cleared", "turn-sealed");
-
-		await sealed;
-
-		expect(orchestrator.isActive("conv-cleared")).toBe(false);
-
-		const lateEvents: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-cleared", (e) => lateEvents.push(e));
-		unsub();
-
-		expect(lateEvents).toHaveLength(0);
-	});
-
-	it("handleMessage convenience — drives turn end-to-end via onEvent and resolves on seal", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const events: AgentEvent[] = [];
-		await orchestrator.handleMessage({
-			conversationId: "conv-hm",
-			text: "Hi",
-			onEvent: (e) => events.push(e),
-		});
-
-		const types = events.map((e) => e.type);
-		expect(types[0]).toBe("user-message");
-		expect(types[1]).toBe("turn-start");
-		expect(types).toContain("text-delta");
-		expect(types[types.length - 1]).toBe("turn-sealed");
-
-		const stored = store.data.get("conv-hm");
-		expect(stored).toHaveLength(2);
-	});
-
-	it("handleMessage already-active emits error event and resolves without hanging", async () => {
-		const store = createInMemoryStore();
-		let resolveRunTurn: (() => void) | undefined;
-		const runTurnBlocker = new Promise<void>((resolve) => {
-			resolveRunTurn = resolve;
-		});
-
-		const provider: ProviderContract = {
-			id: "fake",
-			stream: async function* () {
-				yield { type: "text-delta", delta: "slow" } as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
-			await runTurnBlocker;
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: blockingRunTurn,
-		});
-
-		const firstEvents: AgentEvent[] = [];
-		const firstPromise = orchestrator.handleMessage({
-			conversationId: "conv-hm-active",
-			text: "first",
-			onEvent: (e) => firstEvents.push(e),
-		});
-
-		await new Promise<void>((resolve) => setTimeout(resolve, 10));
-
-		const secondEvents: AgentEvent[] = [];
-		const secondPromise = orchestrator.handleMessage({
-			conversationId: "conv-hm-active",
-			text: "second",
-			onEvent: (e) => secondEvents.push(e),
-		});
-
-		await secondPromise;
-
-		expect(secondEvents).toHaveLength(1);
-		expect(secondEvents[0]?.type).toBe("error");
-		expect((secondEvents[0] as AgentEvent & { type: "error" }).message).toBe(
-			"turn already active for this conversation",
-		);
-
-		resolveRunTurn?.();
-		await firstPromise;
-
-		expect(firstEvents.some((e) => e.type === "turn-sealed")).toBe(true);
-	});
+  function waitForEvent(
+    orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
+    conversationId: string,
+    eventType: string,
+  ): Promise<AgentEvent> {
+    return new Promise((resolve) => {
+      const unsub = orchestrator.subscribe(conversationId, (event) => {
+        if (event.type === eventType) {
+          unsub();
+          resolve(event);
+        }
+      });
+    });
+  }
+
+  it("subscribe-BEFORE-startTurn delivers — listener receives full ordered event sequence", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "text-delta", delta: " world" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-pre-sub", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-pre-sub", text: "Hi" });
+
+    const sealed = waitForEvent(orchestrator, "conv-pre-sub", "turn-sealed");
+    await sealed;
+
+    unsub();
+
+    expect(events.length).toBeGreaterThan(0);
+    const types = events.map((e) => e.type);
+    expect(types[0]).toBe("user-message");
+    expect(types[1]).toBe("turn-start");
+    expect(types).toContain("text-delta");
+    expect(types[types.length - 1]).toBe("turn-sealed");
+
+    const textDeltas = events.filter((e) => e.type === "text-delta");
+    expect(textDeltas).toHaveLength(2);
+  });
+
+  it("multi-subscriber fan-out (subscribed before start) — two listeners receive identical ordered events", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "text-delta", delta: " world" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const eventsA: AgentEvent[] = [];
+    const eventsB: AgentEvent[] = [];
+    const unsubA = orchestrator.subscribe("conv-fanout-pre", (e) => eventsA.push(e));
+    const unsubB = orchestrator.subscribe("conv-fanout-pre", (e) => eventsB.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-fanout-pre", text: "Hi" });
+
+    const sealed = waitForEvent(orchestrator, "conv-fanout-pre", "turn-sealed");
+    await sealed;
+
+    unsubA();
+    unsubB();
+
+    expect(eventsA.length).toBeGreaterThan(0);
+    expect(eventsA).toEqual(eventsB);
+
+    const types = eventsA.map((e) => e.type);
+    expect(types[0]).toBe("user-message");
+    expect(types[1]).toBe("turn-start");
+    expect(types[types.length - 1]).toBe("turn-sealed");
+  });
+
+  it("late-join replay — subscriber added mid-turn receives buffered events then live events, no gap/dup", async () => {
+    const store = createInMemoryStore();
+    let emitBarrierResolve: (() => void) | undefined;
+    const emitBarrier = new Promise<void>((resolve) => {
+      emitBarrierResolve = resolve;
+    });
+
+    let callIndex = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        const idx = callIndex++;
+        return (async function* () {
+          if (idx === 0) {
+            yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
+            yield { type: "text-delta", delta: " world" } as ProviderEvent;
+            await emitBarrier;
+            yield { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } } as ProviderEvent;
+            yield { type: "finish", reason: "stop" } as ProviderEvent;
+          }
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    orchestrator.startTurn({ conversationId: "conv-latejoin", text: "Hi" });
+
+    const earlyEvents: AgentEvent[] = [];
+    const unsubEarly = orchestrator.subscribe("conv-latejoin", (e) => earlyEvents.push(e));
+
+    await new Promise<void>((resolve) => setTimeout(resolve, 10));
+
+    const lateEvents: AgentEvent[] = [];
+    const unsubLate = orchestrator.subscribe("conv-latejoin", (e) => lateEvents.push(e));
+
+    const earlySnapshot = [...earlyEvents];
+    expect(earlySnapshot.length).toBeGreaterThanOrEqual(2);
+    expect(earlySnapshot.some((e) => e.type === "turn-start")).toBe(true);
+    expect(earlySnapshot.some((e) => e.type === "text-delta")).toBe(true);
+
+    expect(lateEvents.length).toBe(earlySnapshot.length);
+    expect(lateEvents).toEqual(earlySnapshot);
+
+    emitBarrierResolve?.();
+
+    const sealed = waitForEvent(orchestrator, "conv-latejoin", "turn-sealed");
+    await sealed;
+
+    unsubEarly();
+    unsubLate();
+
+    expect(earlyEvents.length).toBeGreaterThan(earlySnapshot.length);
+    expect(lateEvents.length).toBe(earlyEvents.length);
+    expect(lateEvents).toEqual(earlyEvents);
+  });
+
+  it("subscriber persists across turns — one subscriber receives events from two sequential turns", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Turn1" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+      [
+        { type: "text-delta", delta: "Turn2" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const allEvents: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-persist", (e) => allEvents.push(e));
+
+    // First turn
+    orchestrator.startTurn({ conversationId: "conv-persist", text: "First" });
+    const sealed1 = waitForEvent(orchestrator, "conv-persist", "turn-sealed");
+    await sealed1;
+
+    // Second turn
+    orchestrator.startTurn({ conversationId: "conv-persist", text: "Second" });
+    const sealed2 = waitForEvent(orchestrator, "conv-persist", "turn-sealed");
+    await sealed2;
+
+    unsub();
+
+    const turnStarts = allEvents.filter((e) => e.type === "turn-start");
+    expect(turnStarts).toHaveLength(2);
+
+    const turnSealeds = allEvents.filter((e) => e.type === "turn-sealed");
+    expect(turnSealeds).toHaveLength(2);
+
+    const textDeltas = allEvents.filter((e) => e.type === "text-delta");
+    expect(textDeltas).toHaveLength(2);
+    expect((textDeltas[0] as AgentEvent & { type: "text-delta" }).delta).toBe("Turn1");
+    expect((textDeltas[1] as AgentEvent & { type: "text-delta" }).delta).toBe("Turn2");
+  });
+
+  it("detached completion — turn runs to completion with zero subscribers and persists", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const result = orchestrator.startTurn({ conversationId: "conv-detached", text: "Hi" });
+    expect(result.started).toBe(true);
+    const sealed = waitForEvent(orchestrator, "conv-detached", "turn-sealed");
+
+    await sealed;
+
+    const stored = store.data.get("conv-detached");
+    expect(stored).toBeDefined();
+    expect(stored).toHaveLength(2);
+    expect(stored?.[0]?.role).toBe("user");
+    expect(stored?.[1]?.role).toBe("assistant");
+  });
+
+  it("single-flight reject — startTurn while active returns already-active, no second turn", async () => {
+    const store = createInMemoryStore();
+    let resolveRunTurn: (() => void) | undefined;
+    const runTurnBlocker = new Promise<void>((resolve) => {
+      resolveRunTurn = resolve;
+    });
+
+    const provider: ProviderContract = {
+      id: "fake",
+      stream: async function* () {
+        yield { type: "text-delta", delta: "slow" } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
+      await runTurnBlocker;
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: blockingRunTurn,
+    });
+
+    const first = orchestrator.startTurn({ conversationId: "conv-singleflight", text: "first" });
+    expect(first.started).toBe(true);
+    const sealed = waitForEvent(orchestrator, "conv-singleflight", "turn-sealed");
+
+    const second = orchestrator.startTurn({ conversationId: "conv-singleflight", text: "second" });
+    expect(second.started).toBe(false);
+    if (!second.started) {
+      expect(second.reason).toBe("already-active");
+    }
+
+    resolveRunTurn?.();
+    await sealed;
+
+    expect(store.data.get("conv-singleflight")?.length).toBe(2);
+  });
+
+  it("isActive false after seal — subscribe replays nothing after turn-sealed", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    expect(orchestrator.isActive("conv-cleared")).toBe(false);
+
+    orchestrator.startTurn({ conversationId: "conv-cleared", text: "test" });
+    const sealed = waitForEvent(orchestrator, "conv-cleared", "turn-sealed");
+
+    await sealed;
+
+    expect(orchestrator.isActive("conv-cleared")).toBe(false);
+
+    const lateEvents: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-cleared", (e) => lateEvents.push(e));
+    unsub();
+
+    expect(lateEvents).toHaveLength(0);
+  });
+
+  it("handleMessage convenience — drives turn end-to-end via onEvent and resolves on seal", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const events: AgentEvent[] = [];
+    await orchestrator.handleMessage({
+      conversationId: "conv-hm",
+      text: "Hi",
+      onEvent: (e) => events.push(e),
+    });
+
+    const types = events.map((e) => e.type);
+    expect(types[0]).toBe("user-message");
+    expect(types[1]).toBe("turn-start");
+    expect(types).toContain("text-delta");
+    expect(types[types.length - 1]).toBe("turn-sealed");
+
+    const stored = store.data.get("conv-hm");
+    expect(stored).toHaveLength(2);
+  });
+
+  it("handleMessage already-active emits error event and resolves without hanging", async () => {
+    const store = createInMemoryStore();
+    let resolveRunTurn: (() => void) | undefined;
+    const runTurnBlocker = new Promise<void>((resolve) => {
+      resolveRunTurn = resolve;
+    });
+
+    const provider: ProviderContract = {
+      id: "fake",
+      stream: async function* () {
+        yield { type: "text-delta", delta: "slow" } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const blockingRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
+      await runTurnBlocker;
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: blockingRunTurn,
+    });
+
+    const firstEvents: AgentEvent[] = [];
+    const firstPromise = orchestrator.handleMessage({
+      conversationId: "conv-hm-active",
+      text: "first",
+      onEvent: (e) => firstEvents.push(e),
+    });
+
+    await new Promise<void>((resolve) => setTimeout(resolve, 10));
+
+    const secondEvents: AgentEvent[] = [];
+    const secondPromise = orchestrator.handleMessage({
+      conversationId: "conv-hm-active",
+      text: "second",
+      onEvent: (e) => secondEvents.push(e),
+    });
+
+    await secondPromise;
+
+    expect(secondEvents).toHaveLength(1);
+    expect(secondEvents[0]?.type).toBe("error");
+    expect((secondEvents[0] as AgentEvent & { type: "error" }).message).toBe(
+      "turn already active for this conversation",
+    );
+
+    resolveRunTurn?.();
+    await firstPromise;
+
+    expect(firstEvents.some((e) => e.type === "turn-sealed")).toBe(true);
+  });
 });
 
 describe("user-message event", () => {
-	function waitForEvent(
-		orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
-		conversationId: string,
-		eventType: string,
-	): Promise<AgentEvent> {
-		return new Promise((resolve) => {
-			const unsub = orchestrator.subscribe(conversationId, (event) => {
-				if (event.type === eventType) {
-					unsub();
-					resolve(event);
-				}
-			});
-		});
-	}
-
-	it("emits user-message first — pre-subscriber receives user-message before turn-start", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "Hello" },
-				{ type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-um-first", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-um-first", text: "What is 2+2?" });
-
-		const sealed = waitForEvent(orchestrator, "conv-um-first", "turn-sealed");
-		await sealed;
-		unsub();
-
-		expect(events.length).toBeGreaterThan(1);
-		expect(events[0]?.type).toBe("user-message");
-		const um = events[0] as AgentEvent & { type: "user-message" };
-		expect(um.text).toBe("What is 2+2?");
-		expect(um.conversationId).toBe("conv-um-first");
-		expect(um.turnId).toMatch(/^turn-/);
-		expect(events[1]?.type).toBe("turn-start");
-	});
-
-	it("late-join replays user-message — buffer starts with user-message", async () => {
-		const store = createInMemoryStore();
-		let emitBarrierResolve: (() => void) | undefined;
-		const emitBarrier = new Promise<void>((resolve) => {
-			emitBarrierResolve = resolve;
-		});
-
-		let callIndex = 0;
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				const idx = callIndex++;
-				return (async function* () {
-					if (idx === 0) {
-						yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
-						await emitBarrier;
-						yield { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } } as ProviderEvent;
-						yield { type: "finish", reason: "stop" } as ProviderEvent;
-					}
-				})();
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-		});
-
-		orchestrator.startTurn({ conversationId: "conv-um-late", text: "late prompt" });
-
-		await new Promise<void>((resolve) => setTimeout(resolve, 10));
-
-		const lateEvents: AgentEvent[] = [];
-		const unsubLate = orchestrator.subscribe("conv-um-late", (e) => lateEvents.push(e));
-
-		expect(lateEvents.length).toBeGreaterThanOrEqual(1);
-		expect(lateEvents[0]?.type).toBe("user-message");
-		const um = lateEvents[0] as AgentEvent & { type: "user-message" };
-		expect(um.text).toBe("late prompt");
-		expect(um.turnId).toMatch(/^turn-/);
-
-		emitBarrierResolve?.();
-		const sealed = waitForEvent(orchestrator, "conv-um-late", "turn-sealed");
-		await sealed;
-		unsubLate();
-	});
-
-	it("metrics unaffected — user-message does not alter TurnMetrics", async () => {
-		const store = createInMemoryStore();
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "usage", usage: { inputTokens: 10, outputTokens: 5 } },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			now: () => 1000,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-um-metrics",
-			text: "test",
-			onEvent: () => {},
-		});
-
-		const metrics = store.metricsData.get("conv-um-metrics");
-		expect(metrics).toBeDefined();
-		expect(metrics).toHaveLength(1);
-
-		const tm = metrics?.[0];
-		if (tm === undefined) throw new Error("expected metrics");
-
-		expect(tm.turnId).toMatch(/^turn-/);
-		expect(tm.usage.inputTokens).toBe(10);
-		expect(tm.usage.outputTokens).toBe(5);
-		expect(tm.steps).toHaveLength(1);
-		expect(tm.steps[0]?.usage.inputTokens).toBe(10);
-		expect(tm.steps[0]?.usage.outputTokens).toBe(5);
-	});
+  function waitForEvent(
+    orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
+    conversationId: string,
+    eventType: string,
+  ): Promise<AgentEvent> {
+    return new Promise((resolve) => {
+      const unsub = orchestrator.subscribe(conversationId, (event) => {
+        if (event.type === eventType) {
+          unsub();
+          resolve(event);
+        }
+      });
+    });
+  }
+
+  it("emits user-message first — pre-subscriber receives user-message before turn-start", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "Hello" },
+        { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-um-first", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-um-first", text: "What is 2+2?" });
+
+    const sealed = waitForEvent(orchestrator, "conv-um-first", "turn-sealed");
+    await sealed;
+    unsub();
+
+    expect(events.length).toBeGreaterThan(1);
+    expect(events[0]?.type).toBe("user-message");
+    const um = events[0] as AgentEvent & { type: "user-message" };
+    expect(um.text).toBe("What is 2+2?");
+    expect(um.conversationId).toBe("conv-um-first");
+    expect(um.turnId).toMatch(/^turn-/);
+    expect(events[1]?.type).toBe("turn-start");
+  });
+
+  it("late-join replays user-message — buffer starts with user-message", async () => {
+    const store = createInMemoryStore();
+    let emitBarrierResolve: (() => void) | undefined;
+    const emitBarrier = new Promise<void>((resolve) => {
+      emitBarrierResolve = resolve;
+    });
+
+    let callIndex = 0;
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        const idx = callIndex++;
+        return (async function* () {
+          if (idx === 0) {
+            yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
+            await emitBarrier;
+            yield { type: "usage", usage: { inputTokens: 5, outputTokens: 3 } } as ProviderEvent;
+            yield { type: "finish", reason: "stop" } as ProviderEvent;
+          }
+        })();
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+    });
+
+    orchestrator.startTurn({ conversationId: "conv-um-late", text: "late prompt" });
+
+    await new Promise<void>((resolve) => setTimeout(resolve, 10));
+
+    const lateEvents: AgentEvent[] = [];
+    const unsubLate = orchestrator.subscribe("conv-um-late", (e) => lateEvents.push(e));
+
+    expect(lateEvents.length).toBeGreaterThanOrEqual(1);
+    expect(lateEvents[0]?.type).toBe("user-message");
+    const um = lateEvents[0] as AgentEvent & { type: "user-message" };
+    expect(um.text).toBe("late prompt");
+    expect(um.turnId).toMatch(/^turn-/);
+
+    emitBarrierResolve?.();
+    const sealed = waitForEvent(orchestrator, "conv-um-late", "turn-sealed");
+    await sealed;
+    unsubLate();
+  });
+
+  it("metrics unaffected — user-message does not alter TurnMetrics", async () => {
+    const store = createInMemoryStore();
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "usage", usage: { inputTokens: 10, outputTokens: 5 } },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      now: () => 1000,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-um-metrics",
+      text: "test",
+      onEvent: () => {},
+    });
+
+    const metrics = store.metricsData.get("conv-um-metrics");
+    expect(metrics).toBeDefined();
+    expect(metrics).toHaveLength(1);
+
+    const tm = metrics?.[0];
+    if (tm === undefined) throw new Error("expected metrics");
+
+    expect(tm.turnId).toMatch(/^turn-/);
+    expect(tm.usage.inputTokens).toBe(10);
+    expect(tm.usage.outputTokens).toBe(5);
+    expect(tm.steps).toHaveLength(1);
+    expect(tm.steps[0]?.usage.inputTokens).toBe(10);
+    expect(tm.steps[0]?.usage.outputTokens).toBe(5);
+  });
 });
 
 describe("closeConversation (CR-4c)", () => {
-	it("aborts an in-flight turn: done.reason 'aborted', partial messages persisted, turn seals", async () => {
-		const store = createInMemoryStore();
-		let releaseStream: (() => void) | undefined;
-		const barrier = new Promise<void>((resolve) => {
-			releaseStream = resolve;
-		});
-		const provider: ProviderContract = {
-			id: "fake",
-			stream() {
-				return (async function* () {
-					yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
-					await barrier;
-					yield { type: "text-delta", delta: " world" } as ProviderEvent;
-					yield { type: "finish", reason: "stop" } as ProviderEvent;
-				})();
-			},
-		};
-
-		const emittedHooks: string[] = [];
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: (hook) => {
-				emittedHooks.push(hook.id);
-			},
-		});
-
-		const events: AgentEvent[] = [];
-		let resolveSealed: (() => void) | undefined;
-		const sealed = new Promise<void>((resolve) => {
-			resolveSealed = resolve;
-		});
-		let resolveFirstDelta: (() => void) | undefined;
-		const firstDelta = new Promise<void>((resolve) => {
-			resolveFirstDelta = resolve;
-		});
-		orchestrator.subscribe("conv-close", (e) => {
-			events.push(e);
-			if (e.type === "text-delta") resolveFirstDelta?.();
-			if (e.type === "turn-sealed") resolveSealed?.();
-		});
-
-		orchestrator.startTurn({ conversationId: "conv-close", text: "Hi" });
-		await firstDelta;
-
-		const result = orchestrator.closeConversation("conv-close");
-		expect(result.abortedTurn).toBe(true);
-		expect(emittedHooks).toContain("session-orchestrator/conversation-closed");
-
-		releaseStream?.();
-		await sealed;
-
-		const done = events.find((e): e is Extract<AgentEvent, { type: "done" }> => e.type === "done");
-		expect(done?.reason).toBe("aborted");
-		expect(orchestrator.isActive("conv-close")).toBe(false);
-
-		// Durability: the partial turn persisted normally (user msg + partial reply).
-		const persisted = store.data.get("conv-close") ?? [];
-		expect(persisted.length).toBeGreaterThanOrEqual(1);
-		expect(persisted[0]?.role).toBe("user");
-	});
-
-	it("is idempotent on an idle/unknown conversation: abortedTurn false, hook still emitted", async () => {
-		const store = createInMemoryStore();
-		const emitted: Array<{ hook: string; payload: unknown }> = [];
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => createFakeProvider([]),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: (hook, payload) => {
-				emitted.push({ hook: hook.id, payload });
-			},
-		});
-
-		const result = orchestrator.closeConversation("conv-never-seen");
-		expect(result.abortedTurn).toBe(false);
-		// The conversation-closed hook is emitted synchronously; the
-		// status-changed hook resolves the workspace id async before emitting.
-		expect(emitted).toEqual([
-			{
-				hook: "session-orchestrator/conversation-closed",
-				payload: { conversationId: "conv-never-seen" },
-			},
-		]);
-		// Flush the async getWorkspaceId resolution so the status-changed emit lands.
-		await new Promise((resolve) => setImmediate(resolve));
-		expect(emitted).toContainEqual({
-			hook: "session-orchestrator/conversation-status-changed",
-			payload: { conversationId: "conv-never-seen", status: "closed", workspaceId: "default" },
-		});
-
-		// Closing again is still safe.
-		expect(orchestrator.closeConversation("conv-never-seen").abortedTurn).toBe(false);
-	});
+  it("aborts an in-flight turn: done.reason 'aborted', partial messages persisted, turn seals", async () => {
+    const store = createInMemoryStore();
+    let releaseStream: (() => void) | undefined;
+    const barrier = new Promise<void>((resolve) => {
+      releaseStream = resolve;
+    });
+    const provider: ProviderContract = {
+      id: "fake",
+      stream() {
+        return (async function* () {
+          yield { type: "text-delta", delta: "Hello" } as ProviderEvent;
+          await barrier;
+          yield { type: "text-delta", delta: " world" } as ProviderEvent;
+          yield { type: "finish", reason: "stop" } as ProviderEvent;
+        })();
+      },
+    };
+
+    const emittedHooks: string[] = [];
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: (hook) => {
+        emittedHooks.push(hook.id);
+      },
+    });
+
+    const events: AgentEvent[] = [];
+    let resolveSealed: (() => void) | undefined;
+    const sealed = new Promise<void>((resolve) => {
+      resolveSealed = resolve;
+    });
+    let resolveFirstDelta: (() => void) | undefined;
+    const firstDelta = new Promise<void>((resolve) => {
+      resolveFirstDelta = resolve;
+    });
+    orchestrator.subscribe("conv-close", (e) => {
+      events.push(e);
+      if (e.type === "text-delta") resolveFirstDelta?.();
+      if (e.type === "turn-sealed") resolveSealed?.();
+    });
+
+    orchestrator.startTurn({ conversationId: "conv-close", text: "Hi" });
+    await firstDelta;
+
+    const result = orchestrator.closeConversation("conv-close");
+    expect(result.abortedTurn).toBe(true);
+    expect(emittedHooks).toContain("session-orchestrator/conversation-closed");
+
+    releaseStream?.();
+    await sealed;
+
+    const done = events.find((e): e is Extract<AgentEvent, { type: "done" }> => e.type === "done");
+    expect(done?.reason).toBe("aborted");
+    expect(orchestrator.isActive("conv-close")).toBe(false);
+
+    // Durability: the partial turn persisted normally (user msg + partial reply).
+    const persisted = store.data.get("conv-close") ?? [];
+    expect(persisted.length).toBeGreaterThanOrEqual(1);
+    expect(persisted[0]?.role).toBe("user");
+  });
+
+  it("is idempotent on an idle/unknown conversation: abortedTurn false, hook still emitted", async () => {
+    const store = createInMemoryStore();
+    const emitted: Array<{ hook: string; payload: unknown }> = [];
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => createFakeProvider([]),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: (hook, payload) => {
+        emitted.push({ hook: hook.id, payload });
+      },
+    });
+
+    const result = orchestrator.closeConversation("conv-never-seen");
+    expect(result.abortedTurn).toBe(false);
+    // The conversation-closed hook is emitted synchronously; the
+    // status-changed hook resolves the workspace id async before emitting.
+    expect(emitted).toEqual([
+      {
+        hook: "session-orchestrator/conversation-closed",
+        payload: { conversationId: "conv-never-seen" },
+      },
+    ]);
+    // Flush the async getWorkspaceId resolution so the status-changed emit lands.
+    await new Promise((resolve) => setImmediate(resolve));
+    expect(emitted).toContainEqual({
+      hook: "session-orchestrator/conversation-status-changed",
+      payload: { conversationId: "conv-never-seen", status: "closed", workspaceId: "default" },
+    });
+
+    // Closing again is still safe.
+    expect(orchestrator.closeConversation("conv-never-seen").abortedTurn).toBe(false);
+  });
 });
 
 // --- workspace id on conversationOpened / conversationStatusChanged payloads ---
 
 describe("workspace id broadcast payloads", () => {
-	it("conversationStatusChanged payload carries the workspace id from the store", async () => {
-		const base = createInMemoryStore();
-		// Pre-assign a non-default workspace so we can assert it's threaded
-		// through (not the per-turn start option, which differs).
-		await base.setWorkspaceId("conv-ws-broadcast", "team-workspace");
-
-		const emitted: Array<{ hook: string; payload: ConversationStatusChangedPayload }> = [];
-		const provider = createFakeProvider([
-			[
-				{ type: "text-delta", delta: "ok" },
-				{ type: "finish", reason: "stop" },
-			],
-		]);
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: base,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: (hook, payload) => {
-				if (hook.id === "session-orchestrator/conversation-status-changed") {
-					emitted.push({
-						hook: hook.id,
-						payload: payload as ConversationStatusChangedPayload,
-					});
-				}
-			},
-		});
-
-		// Pass a DIFFERENT per-turn workspaceId to prove the payload uses the
-		// persisted store value, not the start option.
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-broadcast",
-			text: "hi",
-			onEvent: () => {},
-			workspaceId: "should-not-appear",
-		});
-		// Flush the async getWorkspaceId resolutions.
-		await new Promise((resolve) => setImmediate(resolve));
-
-		expect(emitted.length).toBeGreaterThanOrEqual(2);
-		for (const e of emitted) {
-			expect(e.payload.workspaceId).toBe("team-workspace");
-		}
-
-		// closeConversation also threads the persisted workspace id.
-		const closeEmitted: ConversationStatusChangedPayload[] = [];
-		const { orchestrator: orchestrator2 } = createSessionOrchestrator({
-			conversationStore: base,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: (hook, payload) => {
-				if (hook.id === "session-orchestrator/conversation-status-changed") {
-					closeEmitted.push(payload as ConversationStatusChangedPayload);
-				}
-			},
-		});
-		orchestrator2.closeConversation("conv-ws-broadcast");
-		await new Promise((resolve) => setImmediate(resolve));
-		const closed = closeEmitted.find((p) => p.status === "closed");
-		expect(closed).toBeDefined();
-		expect(closed?.workspaceId).toBe("team-workspace");
-	});
-
-	it("conversationOpened payload carries the workspace id (type-level construct)", () => {
-		// conversationOpened is emitted by a sibling transport unit, so this
-		// package only owns the payload TYPE. This regression test pins the
-		// type to require workspaceId (a missing field would fail to compile)
-		// and verifies the persisted value flows through at construction time.
-		const payload: ConversationOpenedPayload = {
-			conversationId: "conv-open",
-			workspaceId: "open-workspace",
-		};
-		expect(payload.workspaceId).toBe("open-workspace");
-		expect(payload.conversationId).toBe("conv-open");
-	});
+  it("conversationStatusChanged payload carries the workspace id from the store", async () => {
+    const base = createInMemoryStore();
+    // Pre-assign a non-default workspace so we can assert it's threaded
+    // through (not the per-turn start option, which differs).
+    await base.setWorkspaceId("conv-ws-broadcast", "team-workspace");
+
+    const emitted: Array<{ hook: string; payload: ConversationStatusChangedPayload }> = [];
+    const provider = createFakeProvider([
+      [
+        { type: "text-delta", delta: "ok" },
+        { type: "finish", reason: "stop" },
+      ],
+    ]);
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: base,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: (hook, payload) => {
+        if (hook.id === "session-orchestrator/conversation-status-changed") {
+          emitted.push({
+            hook: hook.id,
+            payload: payload as ConversationStatusChangedPayload,
+          });
+        }
+      },
+    });
+
+    // Pass a DIFFERENT per-turn workspaceId to prove the payload uses the
+    // persisted store value, not the start option.
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-broadcast",
+      text: "hi",
+      onEvent: () => {},
+      workspaceId: "should-not-appear",
+    });
+    // Flush the async getWorkspaceId resolutions.
+    await new Promise((resolve) => setImmediate(resolve));
+
+    expect(emitted.length).toBeGreaterThanOrEqual(2);
+    for (const e of emitted) {
+      expect(e.payload.workspaceId).toBe("team-workspace");
+    }
+
+    // closeConversation also threads the persisted workspace id.
+    const closeEmitted: ConversationStatusChangedPayload[] = [];
+    const { orchestrator: orchestrator2 } = createSessionOrchestrator({
+      conversationStore: base,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: (hook, payload) => {
+        if (hook.id === "session-orchestrator/conversation-status-changed") {
+          closeEmitted.push(payload as ConversationStatusChangedPayload);
+        }
+      },
+    });
+    orchestrator2.closeConversation("conv-ws-broadcast");
+    await new Promise((resolve) => setImmediate(resolve));
+    const closed = closeEmitted.find((p) => p.status === "closed");
+    expect(closed).toBeDefined();
+    expect(closed?.workspaceId).toBe("team-workspace");
+  });
+
+  it("conversationOpened payload carries the workspace id (type-level construct)", () => {
+    // conversationOpened is emitted by a sibling transport unit, so this
+    // package only owns the payload TYPE. This regression test pins the
+    // type to require workspaceId (a missing field would fail to compile)
+    // and verifies the persisted value flows through at construction time.
+    const payload: ConversationOpenedPayload = {
+      conversationId: "conv-open",
+      workspaceId: "open-workspace",
+    };
+    expect(payload.workspaceId).toBe("open-workspace");
+    expect(payload.conversationId).toBe("conv-open");
+  });
 });
 
 describe("reasoning effort resolution", () => {
-	it("override wins over stored → provider receives the override level", async () => {
-		const store = createInMemoryStore();
-		await store.setReasoningEffort("conv-effort-override", "low");
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-effort-override",
-			text: "hi",
-			onEvent: () => {},
-			reasoningEffort: "max",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.reasoningEffort).toBe("max");
-	});
-
-	it("no override, store has a value → provider receives the stored value", async () => {
-		const store = createInMemoryStore();
-		await store.setReasoningEffort("conv-effort-stored", "xhigh");
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-effort-stored",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.reasoningEffort).toBe("xhigh");
-	});
-
-	it("no override, store empty → provider receives 'high' (default)", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-effort-default",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.reasoningEffort).toBe("high");
-	});
-
-	it("warm receives the same resolved effort as a real turn for the same conversation", async () => {
-		const store = createInMemoryStore();
-		await store.append("conv-warm-effort", [
-			{ role: "user", chunks: [{ type: "text", text: "hi" }] },
-		]);
-		await store.setReasoningEffort("conv-warm-effort", "medium");
-
-		let warmOpts: ProviderStreamOptions | undefined;
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream(_messages, _tools, opts) {
-				warmOpts = opts;
-				return (async function* () {
-					yield {
-						type: "usage",
-						usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
-					} as ProviderEvent;
-					yield { type: "finish", reason: "stop" } as ProviderEvent;
-				})();
-			},
-		};
-
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			emit: () => {},
-		};
-
-		const { orchestrator, activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		await warmService.warm("conv-warm-effort");
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-warm-effort",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(warmOpts?.reasoningEffort).toBe("medium");
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.reasoningEffort).toBe("medium");
-		expect(warmOpts?.reasoningEffort).toBe(captured[0]?.providerOpts?.reasoningEffort);
-	});
+  it("override wins over stored → provider receives the override level", async () => {
+    const store = createInMemoryStore();
+    await store.setReasoningEffort("conv-effort-override", "low");
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-effort-override",
+      text: "hi",
+      onEvent: () => {},
+      reasoningEffort: "max",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.reasoningEffort).toBe("max");
+  });
+
+  it("no override, store has a value → provider receives the stored value", async () => {
+    const store = createInMemoryStore();
+    await store.setReasoningEffort("conv-effort-stored", "xhigh");
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-effort-stored",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.reasoningEffort).toBe("xhigh");
+  });
+
+  it("no override, store empty → provider receives 'high' (default)", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-effort-default",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.reasoningEffort).toBe("high");
+  });
+
+  it("warm receives the same resolved effort as a real turn for the same conversation", async () => {
+    const store = createInMemoryStore();
+    await store.append("conv-warm-effort", [
+      { role: "user", chunks: [{ type: "text", text: "hi" }] },
+    ]);
+    await store.setReasoningEffort("conv-warm-effort", "medium");
+
+    let warmOpts: ProviderStreamOptions | undefined;
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream(_messages, _tools, opts) {
+        warmOpts = opts;
+        return (async function* () {
+          yield {
+            type: "usage",
+            usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
+          } as ProviderEvent;
+          yield { type: "finish", reason: "stop" } as ProviderEvent;
+        })();
+      },
+    };
+
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      emit: () => {},
+    };
+
+    const { orchestrator, activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    await warmService.warm("conv-warm-effort");
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-warm-effort",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(warmOpts?.reasoningEffort).toBe("medium");
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.reasoningEffort).toBe("medium");
+    expect(warmOpts?.reasoningEffort).toBe(captured[0]?.providerOpts?.reasoningEffort);
+  });
 });
 
 // --- Workspace integration (workspaceId threading + effective cwd) ---
 
 describe("workspace integration", () => {
-	function waitForSealed(
-		orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
-		conversationId: string,
-	): Promise<void> {
-		return new Promise((resolve) => {
-			const unsub = orchestrator.subscribe(conversationId, (e) => {
-				if (e.type === "turn-sealed") {
-					unsub();
-					resolve();
-				}
-			});
-		});
-	}
-
-	it("startTurn stamps workspaceId on new conversation", async () => {
-		const base = createInMemoryStore();
-		const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
-		const store: ConversationStore = {
-			...base,
-			async setWorkspaceId(conversationId, workspaceId) {
-				setWorkspaceIdCalls.push({ conversationId, workspaceId });
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: createCapturingRunTurn().captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-stamp",
-			text: "hi",
-			onEvent: () => {},
-			workspaceId: "my-workspace",
-		});
-
-		expect(setWorkspaceIdCalls).toContainEqual({
-			conversationId: "conv-ws-stamp",
-			workspaceId: "my-workspace",
-		});
-	});
-
-	it("startTurn defaults workspaceId to default", async () => {
-		const base = createInMemoryStore();
-		const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
-		const store: ConversationStore = {
-			...base,
-			async setWorkspaceId(conversationId, workspaceId) {
-				setWorkspaceIdCalls.push({ conversationId, workspaceId });
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: createCapturingRunTurn().captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-default",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(setWorkspaceIdCalls).toContainEqual({
-			conversationId: "conv-ws-default",
-			workspaceId: "default",
-		});
-	});
-
-	it("startTurn auto-creates workspace if missing", async () => {
-		const base = createInMemoryStore();
-		const ensureWorkspaceCalls: string[] = [];
-		const store: ConversationStore = {
-			...base,
-			async ensureWorkspace(id) {
-				ensureWorkspaceCalls.push(id);
-				return {
-					id,
-					title: id,
-					defaultCwd: null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: createCapturingRunTurn().captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-autocreate",
-			text: "hi",
-			onEvent: () => {},
-			workspaceId: "brand-new-workspace",
-		});
-
-		expect(ensureWorkspaceCalls).toContain("brand-new-workspace");
-	});
-
-	it("startTurn uses effective cwd when no explicit cwd", async () => {
-		const base = createInMemoryStore();
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd() {
-				return "/workspace/default/cwd";
-			},
-		};
-
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-effcwd",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/workspace/default/cwd");
-	});
-
-	it("startTurn explicit cwd overrides workspace default", async () => {
-		const base = createInMemoryStore();
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd(_conversationId, overrideCwd) {
-				return overrideCwd ?? "/workspace/default/cwd";
-			},
-		};
-
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-override",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "/explicit/cwd",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/explicit/cwd");
-	});
-
-	it("startTurn effective cwd null when nothing set", async () => {
-		const store = createInMemoryStore();
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-ws-null-cwd",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBeUndefined();
-	});
-
-	it("warm uses effective cwd", async () => {
-		const base = createInMemoryStore();
-		await base.append("conv-warm-effcwd", [
-			{ role: "user", chunks: [{ type: "text", text: "hi" }] },
-		]);
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd() {
-				return "/workspace/warm/cwd";
-			},
-		};
-
-		let assemblyCwd: string | undefined = "UNSET";
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield {
-					type: "usage",
-					usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
-				} as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: (assembly: ToolAssembly) => {
-				assemblyCwd = assembly.cwd;
-				return Promise.resolve(assembly);
-			},
-			runTurn,
-			emit: () => {},
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		await warmService.warm("conv-warm-effcwd");
-		expect(assemblyCwd).toBe("/workspace/warm/cwd");
-	});
-
-	it("enqueue threads workspaceId", async () => {
-		const base = createInMemoryStore();
-		const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
-		const store: ConversationStore = {
-			...base,
-			async setWorkspaceId(conversationId, workspaceId) {
-				setWorkspaceIdCalls.push({ conversationId, workspaceId });
-			},
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: createCapturingRunTurn().captureRunTurn,
-		});
-
-		orchestrator.enqueue({
-			conversationId: "conv-enq-ws",
-			text: "hello",
-			workspaceId: "enqueued-ws",
-		});
-		await waitForSealed(orchestrator, "conv-enq-ws");
-
-		expect(setWorkspaceIdCalls).toContainEqual({
-			conversationId: "conv-enq-ws",
-			workspaceId: "enqueued-ws",
-		});
-	});
-
-	// --- cwd-timing invariant: workspace assigned BEFORE getEffectiveCwd ---
-
-	it("new conversation: workspace assigned before getEffectiveCwd resolves (relative per-turn cwd)", async () => {
-		// A fake store that implements the REAL getEffectiveCwd algorithm:
-		// a relative overrideCwd is resolved against the workspace's
-		// defaultCwd via path.resolve. Different workspaces have different
-		// defaultCwds so we can assert which workspace was active when
-		// getEffectiveCwd ran.
-		const workspaceDefaultCwds = new Map<string, string | null>([
-			["default", null],
-			["my-workspace", "/projects/my-workspace"],
-		]);
-		const assignedWorkspaceIds = new Map<string, string>();
-		const callOrder: string[] = [];
-
-		const store: ConversationStore = {
-			...createInMemoryStore(),
-			async getConversationMeta(conversationId) {
-				// A conversation is "known" once setWorkspaceId has been called
-				// (matching the real store, where setWorkspaceId creates a meta
-				// row). This lets us assert the ordering: getConversationMeta
-				// sees null first (new), then setWorkspaceId is called, then
-				// getEffectiveCwd runs and sees the assigned workspace.
-				const wsId = assignedWorkspaceIds.get(conversationId);
-				return wsId !== undefined
-					? {
-							id: conversationId,
-							createdAt: 0,
-							lastActivityAt: 0,
-							title: "Untitled",
-							status: "idle",
-							workspaceId: wsId,
-						}
-					: null;
-			},
-			async ensureWorkspace(id) {
-				callOrder.push(`ensureWorkspace:${id}`);
-				return {
-					id,
-					title: id,
-					defaultCwd: workspaceDefaultCwds.get(id) ?? null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceId(conversationId, workspaceId) {
-				callOrder.push(`setWorkspaceId:${workspaceId}`);
-				assignedWorkspaceIds.set(conversationId, workspaceId);
-			},
-			async getWorkspaceId(conversationId) {
-				return assignedWorkspaceIds.get(conversationId) ?? "default";
-			},
-			async getWorkspace(id) {
-				const defaultCwd = workspaceDefaultCwds.get(id) ?? null;
-				return {
-					id,
-					title: id,
-					defaultCwd,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async getEffectiveCwd(conversationId, overrideCwd) {
-				// Real algorithm: relative cwd resolved against workspace defaultCwd.
-				const wsId = assignedWorkspaceIds.get(conversationId) ?? "default";
-				callOrder.push(`getEffectiveCwd(workspace=${wsId})`);
-				const workspaceCwd = workspaceDefaultCwds.get(wsId) ?? null;
-				const conversationCwd = overrideCwd ?? null;
-				if (conversationCwd === null) {
-					return workspaceCwd;
-				}
-				if (conversationCwd.startsWith("/")) {
-					return conversationCwd;
-				}
-				return pathResolve(workspaceCwd ?? "/server-default", conversationCwd);
-			},
-		};
-
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-cwd-timing",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "arch-rewrite",
-			workspaceId: "my-workspace",
-		});
-
-		// The workspace was assigned before getEffectiveCwd ran.
-		const ensureIdx = callOrder.indexOf("ensureWorkspace:my-workspace");
-		const setWsIdx = callOrder.indexOf("setWorkspaceId:my-workspace");
-		const effCwdIdx = callOrder.indexOf("getEffectiveCwd(workspace=my-workspace)");
-		expect(ensureIdx).toBeGreaterThanOrEqual(0);
-		expect(setWsIdx).toBeGreaterThan(ensureIdx);
-		expect(effCwdIdx).toBeGreaterThan(setWsIdx);
-
-		// The relative cwd "arch-rewrite" resolved against my-workspace's
-		// defaultCwd "/projects/my-workspace", NOT against the default
-		// workspace's null (→ server default / process.cwd()).
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/projects/my-workspace/arch-rewrite");
-	});
-
-	it("new conversation with no per-turn cwd: workspace assigned, effective cwd = workspace defaultCwd", async () => {
-		const workspaceDefaultCwds = new Map<string, string | null>([
-			["default", null],
-			["my-workspace", "/projects/my-workspace"],
-		]);
-		const assignedWorkspaceIds = new Map<string, string>();
-
-		const store: ConversationStore = {
-			...createInMemoryStore(),
-			async getConversationMeta(conversationId) {
-				const wsId = assignedWorkspaceIds.get(conversationId);
-				return wsId !== undefined
-					? {
-							id: conversationId,
-							createdAt: 0,
-							lastActivityAt: 0,
-							title: "Untitled",
-							status: "idle",
-							workspaceId: wsId,
-						}
-					: null;
-			},
-			async ensureWorkspace(id) {
-				return {
-					id,
-					title: id,
-					defaultCwd: workspaceDefaultCwds.get(id) ?? null,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async setWorkspaceId(conversationId, workspaceId) {
-				assignedWorkspaceIds.set(conversationId, workspaceId);
-			},
-			async getWorkspaceId(conversationId) {
-				return assignedWorkspaceIds.get(conversationId) ?? "default";
-			},
-			async getWorkspace(id) {
-				const defaultCwd = workspaceDefaultCwds.get(id) ?? null;
-				return {
-					id,
-					title: id,
-					defaultCwd,
-					defaultComputerId: null,
-					createdAt: 0,
-					lastActivityAt: 0,
-				};
-			},
-			async getEffectiveCwd(conversationId, overrideCwd) {
-				const wsId = assignedWorkspaceIds.get(conversationId) ?? "default";
-				const workspaceCwd = workspaceDefaultCwds.get(wsId) ?? null;
-				const conversationCwd = overrideCwd ?? null;
-				if (conversationCwd === null) {
-					return workspaceCwd;
-				}
-				if (conversationCwd.startsWith("/")) {
-					return conversationCwd;
-				}
-				return pathResolve(workspaceCwd ?? "/server-default", conversationCwd);
-			},
-		};
-
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-cwd-timing-no-cwd",
-			text: "hi",
-			onEvent: () => {},
-			workspaceId: "my-workspace",
-		});
-
-		// No per-turn cwd → effective cwd = workspace defaultCwd.
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("/projects/my-workspace");
-	});
-
-	it("existing conversation: workspace NOT re-assigned, effective cwd resolves as before", async () => {
-		const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
-		const base = createInMemoryStore();
-		// Pre-populate the conversation so getConversationMeta returns non-null
-		// (existing conversation with history + workspace already assigned).
-		await base.append("conv-existing", [
-			{ role: "user", chunks: [{ type: "text", text: "previous turn" }] },
-			{ role: "assistant", chunks: [{ type: "text", text: "reply" }] },
-		]);
-
-		const store: ConversationStore = {
-			...base,
-			async setWorkspaceId(conversationId, workspaceId) {
-				setWorkspaceIdCalls.push({ conversationId, workspaceId });
-			},
-			async getEffectiveCwd(_conversationId, overrideCwd) {
-				return overrideCwd ?? "/existing/workspace/cwd";
-			},
-		};
-
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-existing",
-			text: "follow up",
-			onEvent: () => {},
-			cwd: "arch-rewrite",
-			workspaceId: "should-not-be-stamped",
-		});
-
-		// setWorkspaceId was NOT called (existing conversation keeps its workspace).
-		expect(setWorkspaceIdCalls).toHaveLength(0);
-
-		// Effective cwd still resolves (here via the fake store's override).
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.cwd).toBe("arch-rewrite");
-	});
+  function waitForSealed(
+    orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
+    conversationId: string,
+  ): Promise<void> {
+    return new Promise((resolve) => {
+      const unsub = orchestrator.subscribe(conversationId, (e) => {
+        if (e.type === "turn-sealed") {
+          unsub();
+          resolve();
+        }
+      });
+    });
+  }
+
+  it("startTurn stamps workspaceId on new conversation", async () => {
+    const base = createInMemoryStore();
+    const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
+    const store: ConversationStore = {
+      ...base,
+      async setWorkspaceId(conversationId, workspaceId) {
+        setWorkspaceIdCalls.push({ conversationId, workspaceId });
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: createCapturingRunTurn().captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-stamp",
+      text: "hi",
+      onEvent: () => {},
+      workspaceId: "my-workspace",
+    });
+
+    expect(setWorkspaceIdCalls).toContainEqual({
+      conversationId: "conv-ws-stamp",
+      workspaceId: "my-workspace",
+    });
+  });
+
+  it("startTurn defaults workspaceId to default", async () => {
+    const base = createInMemoryStore();
+    const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
+    const store: ConversationStore = {
+      ...base,
+      async setWorkspaceId(conversationId, workspaceId) {
+        setWorkspaceIdCalls.push({ conversationId, workspaceId });
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: createCapturingRunTurn().captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-default",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(setWorkspaceIdCalls).toContainEqual({
+      conversationId: "conv-ws-default",
+      workspaceId: "default",
+    });
+  });
+
+  it("startTurn auto-creates workspace if missing", async () => {
+    const base = createInMemoryStore();
+    const ensureWorkspaceCalls: string[] = [];
+    const store: ConversationStore = {
+      ...base,
+      async ensureWorkspace(id) {
+        ensureWorkspaceCalls.push(id);
+        return {
+          id,
+          title: id,
+          defaultCwd: null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: createCapturingRunTurn().captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-autocreate",
+      text: "hi",
+      onEvent: () => {},
+      workspaceId: "brand-new-workspace",
+    });
+
+    expect(ensureWorkspaceCalls).toContain("brand-new-workspace");
+  });
+
+  it("startTurn uses effective cwd when no explicit cwd", async () => {
+    const base = createInMemoryStore();
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd() {
+        return "/workspace/default/cwd";
+      },
+    };
+
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-effcwd",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/workspace/default/cwd");
+  });
+
+  it("startTurn explicit cwd overrides workspace default", async () => {
+    const base = createInMemoryStore();
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd(_conversationId, overrideCwd) {
+        return overrideCwd ?? "/workspace/default/cwd";
+      },
+    };
+
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-override",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "/explicit/cwd",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/explicit/cwd");
+  });
+
+  it("startTurn effective cwd null when nothing set", async () => {
+    const store = createInMemoryStore();
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-ws-null-cwd",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBeUndefined();
+  });
+
+  it("warm uses effective cwd", async () => {
+    const base = createInMemoryStore();
+    await base.append("conv-warm-effcwd", [
+      { role: "user", chunks: [{ type: "text", text: "hi" }] },
+    ]);
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd() {
+        return "/workspace/warm/cwd";
+      },
+    };
+
+    let assemblyCwd: string | undefined = "UNSET";
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield {
+          type: "usage",
+          usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
+        } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: (assembly: ToolAssembly) => {
+        assemblyCwd = assembly.cwd;
+        return Promise.resolve(assembly);
+      },
+      runTurn,
+      emit: () => {},
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    await warmService.warm("conv-warm-effcwd");
+    expect(assemblyCwd).toBe("/workspace/warm/cwd");
+  });
+
+  it("enqueue threads workspaceId", async () => {
+    const base = createInMemoryStore();
+    const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
+    const store: ConversationStore = {
+      ...base,
+      async setWorkspaceId(conversationId, workspaceId) {
+        setWorkspaceIdCalls.push({ conversationId, workspaceId });
+      },
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: createCapturingRunTurn().captureRunTurn,
+    });
+
+    orchestrator.enqueue({
+      conversationId: "conv-enq-ws",
+      text: "hello",
+      workspaceId: "enqueued-ws",
+    });
+    await waitForSealed(orchestrator, "conv-enq-ws");
+
+    expect(setWorkspaceIdCalls).toContainEqual({
+      conversationId: "conv-enq-ws",
+      workspaceId: "enqueued-ws",
+    });
+  });
+
+  // --- cwd-timing invariant: workspace assigned BEFORE getEffectiveCwd ---
+
+  it("new conversation: workspace assigned before getEffectiveCwd resolves (relative per-turn cwd)", async () => {
+    // A fake store that implements the REAL getEffectiveCwd algorithm:
+    // a relative overrideCwd is resolved against the workspace's
+    // defaultCwd via path.resolve. Different workspaces have different
+    // defaultCwds so we can assert which workspace was active when
+    // getEffectiveCwd ran.
+    const workspaceDefaultCwds = new Map<string, string | null>([
+      ["default", null],
+      ["my-workspace", "/projects/my-workspace"],
+    ]);
+    const assignedWorkspaceIds = new Map<string, string>();
+    const callOrder: string[] = [];
+
+    const store: ConversationStore = {
+      ...createInMemoryStore(),
+      async getConversationMeta(conversationId) {
+        // A conversation is "known" once setWorkspaceId has been called
+        // (matching the real store, where setWorkspaceId creates a meta
+        // row). This lets us assert the ordering: getConversationMeta
+        // sees null first (new), then setWorkspaceId is called, then
+        // getEffectiveCwd runs and sees the assigned workspace.
+        const wsId = assignedWorkspaceIds.get(conversationId);
+        return wsId !== undefined
+          ? {
+              id: conversationId,
+              createdAt: 0,
+              lastActivityAt: 0,
+              title: "Untitled",
+              status: "idle",
+              workspaceId: wsId,
+            }
+          : null;
+      },
+      async ensureWorkspace(id) {
+        callOrder.push(`ensureWorkspace:${id}`);
+        return {
+          id,
+          title: id,
+          defaultCwd: workspaceDefaultCwds.get(id) ?? null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceId(conversationId, workspaceId) {
+        callOrder.push(`setWorkspaceId:${workspaceId}`);
+        assignedWorkspaceIds.set(conversationId, workspaceId);
+      },
+      async getWorkspaceId(conversationId) {
+        return assignedWorkspaceIds.get(conversationId) ?? "default";
+      },
+      async getWorkspace(id) {
+        const defaultCwd = workspaceDefaultCwds.get(id) ?? null;
+        return {
+          id,
+          title: id,
+          defaultCwd,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async getEffectiveCwd(conversationId, overrideCwd) {
+        // Real algorithm: relative cwd resolved against workspace defaultCwd.
+        const wsId = assignedWorkspaceIds.get(conversationId) ?? "default";
+        callOrder.push(`getEffectiveCwd(workspace=${wsId})`);
+        const workspaceCwd = workspaceDefaultCwds.get(wsId) ?? null;
+        const conversationCwd = overrideCwd ?? null;
+        if (conversationCwd === null) {
+          return workspaceCwd;
+        }
+        if (conversationCwd.startsWith("/")) {
+          return conversationCwd;
+        }
+        return pathResolve(workspaceCwd ?? "/server-default", conversationCwd);
+      },
+    };
+
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-cwd-timing",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "arch-rewrite",
+      workspaceId: "my-workspace",
+    });
+
+    // The workspace was assigned before getEffectiveCwd ran.
+    const ensureIdx = callOrder.indexOf("ensureWorkspace:my-workspace");
+    const setWsIdx = callOrder.indexOf("setWorkspaceId:my-workspace");
+    const effCwdIdx = callOrder.indexOf("getEffectiveCwd(workspace=my-workspace)");
+    expect(ensureIdx).toBeGreaterThanOrEqual(0);
+    expect(setWsIdx).toBeGreaterThan(ensureIdx);
+    expect(effCwdIdx).toBeGreaterThan(setWsIdx);
+
+    // The relative cwd "arch-rewrite" resolved against my-workspace's
+    // defaultCwd "/projects/my-workspace", NOT against the default
+    // workspace's null (→ server default / process.cwd()).
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/projects/my-workspace/arch-rewrite");
+  });
+
+  it("new conversation with no per-turn cwd: workspace assigned, effective cwd = workspace defaultCwd", async () => {
+    const workspaceDefaultCwds = new Map<string, string | null>([
+      ["default", null],
+      ["my-workspace", "/projects/my-workspace"],
+    ]);
+    const assignedWorkspaceIds = new Map<string, string>();
+
+    const store: ConversationStore = {
+      ...createInMemoryStore(),
+      async getConversationMeta(conversationId) {
+        const wsId = assignedWorkspaceIds.get(conversationId);
+        return wsId !== undefined
+          ? {
+              id: conversationId,
+              createdAt: 0,
+              lastActivityAt: 0,
+              title: "Untitled",
+              status: "idle",
+              workspaceId: wsId,
+            }
+          : null;
+      },
+      async ensureWorkspace(id) {
+        return {
+          id,
+          title: id,
+          defaultCwd: workspaceDefaultCwds.get(id) ?? null,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async setWorkspaceId(conversationId, workspaceId) {
+        assignedWorkspaceIds.set(conversationId, workspaceId);
+      },
+      async getWorkspaceId(conversationId) {
+        return assignedWorkspaceIds.get(conversationId) ?? "default";
+      },
+      async getWorkspace(id) {
+        const defaultCwd = workspaceDefaultCwds.get(id) ?? null;
+        return {
+          id,
+          title: id,
+          defaultCwd,
+          defaultComputerId: null,
+          createdAt: 0,
+          lastActivityAt: 0,
+        };
+      },
+      async getEffectiveCwd(conversationId, overrideCwd) {
+        const wsId = assignedWorkspaceIds.get(conversationId) ?? "default";
+        const workspaceCwd = workspaceDefaultCwds.get(wsId) ?? null;
+        const conversationCwd = overrideCwd ?? null;
+        if (conversationCwd === null) {
+          return workspaceCwd;
+        }
+        if (conversationCwd.startsWith("/")) {
+          return conversationCwd;
+        }
+        return pathResolve(workspaceCwd ?? "/server-default", conversationCwd);
+      },
+    };
+
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-cwd-timing-no-cwd",
+      text: "hi",
+      onEvent: () => {},
+      workspaceId: "my-workspace",
+    });
+
+    // No per-turn cwd → effective cwd = workspace defaultCwd.
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("/projects/my-workspace");
+  });
+
+  it("existing conversation: workspace NOT re-assigned, effective cwd resolves as before", async () => {
+    const setWorkspaceIdCalls: Array<{ conversationId: string; workspaceId: string }> = [];
+    const base = createInMemoryStore();
+    // Pre-populate the conversation so getConversationMeta returns non-null
+    // (existing conversation with history + workspace already assigned).
+    await base.append("conv-existing", [
+      { role: "user", chunks: [{ type: "text", text: "previous turn" }] },
+      { role: "assistant", chunks: [{ type: "text", text: "reply" }] },
+    ]);
+
+    const store: ConversationStore = {
+      ...base,
+      async setWorkspaceId(conversationId, workspaceId) {
+        setWorkspaceIdCalls.push({ conversationId, workspaceId });
+      },
+      async getEffectiveCwd(_conversationId, overrideCwd) {
+        return overrideCwd ?? "/existing/workspace/cwd";
+      },
+    };
+
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-existing",
+      text: "follow up",
+      onEvent: () => {},
+      cwd: "arch-rewrite",
+      workspaceId: "should-not-be-stamped",
+    });
+
+    // setWorkspaceId was NOT called (existing conversation keeps its workspace).
+    expect(setWorkspaceIdCalls).toHaveLength(0);
+
+    // Effective cwd still resolves (here via the fake store's override).
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.cwd).toBe("arch-rewrite");
+  });
 });
 
 describe("getEffectiveCwd override (per-turn cwd resolution)", () => {
-	it("turn start with a per-turn cwd → getEffectiveCwd called with that cwd as overrideCwd", async () => {
-		const base = createInMemoryStore();
-		const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
-			[];
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd(conversationId, overrideCwd) {
-				effectiveCwdCalls.push({ conversationId, overrideCwd });
-				return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
-			},
-		};
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-turn-override",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "arch-rewrite",
-		});
-
-		expect(effectiveCwdCalls).toHaveLength(1);
-		expect(effectiveCwdCalls[0]?.overrideCwd).toBe("arch-rewrite");
-	});
-
-	it("turn start with no per-turn cwd → getEffectiveCwd called with undefined override", async () => {
-		const base = createInMemoryStore();
-		const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
-			[];
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd(conversationId, overrideCwd) {
-				effectiveCwdCalls.push({ conversationId, overrideCwd });
-				return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
-			},
-		};
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-turn-no-override",
-			text: "hi",
-			onEvent: () => {},
-		});
-
-		expect(effectiveCwdCalls).toHaveLength(1);
-		expect(effectiveCwdCalls[0]?.overrideCwd).toBeUndefined();
-	});
-
-	it("warm with opts.cwd → getEffectiveCwd called with opts.cwd as override", async () => {
-		const base = createInMemoryStore();
-		await base.append("conv-warm-override", [
-			{ role: "user", chunks: [{ type: "text", text: "hi" }] },
-		]);
-		const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
-			[];
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd(conversationId, overrideCwd) {
-				effectiveCwdCalls.push({ conversationId, overrideCwd });
-				return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
-			},
-		};
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield {
-					type: "usage",
-					usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
-				} as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: () => {},
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		await warmService.warm("conv-warm-override", { cwd: "arch-rewrite" });
-
-		expect(effectiveCwdCalls).toHaveLength(1);
-		expect(effectiveCwdCalls[0]?.overrideCwd).toBe("arch-rewrite");
-	});
-
-	it("warm without opts.cwd → getEffectiveCwd called with undefined override", async () => {
-		const base = createInMemoryStore();
-		await base.append("conv-warm-no-override", [
-			{ role: "user", chunks: [{ type: "text", text: "hi" }] },
-		]);
-		const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
-			[];
-		const store: ConversationStore = {
-			...base,
-			async getEffectiveCwd(conversationId, overrideCwd) {
-				effectiveCwdCalls.push({ conversationId, overrideCwd });
-				return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
-			},
-		};
-
-		const provider: ProviderContract = {
-			id: "p",
-			stream: async function* () {
-				yield {
-					type: "usage",
-					usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
-				} as ProviderEvent;
-				yield { type: "finish", reason: "stop" } as ProviderEvent;
-			},
-		};
-
-		const deps = {
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			emit: () => {},
-		};
-
-		const { activeConversations } = createSessionOrchestrator(deps);
-		const warmService = createWarmService(deps, activeConversations);
-
-		await warmService.warm("conv-warm-no-override");
-
-		expect(effectiveCwdCalls).toHaveLength(1);
-		expect(effectiveCwdCalls[0]?.overrideCwd).toBeUndefined();
-	});
+  it("turn start with a per-turn cwd → getEffectiveCwd called with that cwd as overrideCwd", async () => {
+    const base = createInMemoryStore();
+    const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
+      [];
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd(conversationId, overrideCwd) {
+        effectiveCwdCalls.push({ conversationId, overrideCwd });
+        return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
+      },
+    };
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-turn-override",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "arch-rewrite",
+    });
+
+    expect(effectiveCwdCalls).toHaveLength(1);
+    expect(effectiveCwdCalls[0]?.overrideCwd).toBe("arch-rewrite");
+  });
+
+  it("turn start with no per-turn cwd → getEffectiveCwd called with undefined override", async () => {
+    const base = createInMemoryStore();
+    const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
+      [];
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd(conversationId, overrideCwd) {
+        effectiveCwdCalls.push({ conversationId, overrideCwd });
+        return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
+      },
+    };
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-turn-no-override",
+      text: "hi",
+      onEvent: () => {},
+    });
+
+    expect(effectiveCwdCalls).toHaveLength(1);
+    expect(effectiveCwdCalls[0]?.overrideCwd).toBeUndefined();
+  });
+
+  it("warm with opts.cwd → getEffectiveCwd called with opts.cwd as override", async () => {
+    const base = createInMemoryStore();
+    await base.append("conv-warm-override", [
+      { role: "user", chunks: [{ type: "text", text: "hi" }] },
+    ]);
+    const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
+      [];
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd(conversationId, overrideCwd) {
+        effectiveCwdCalls.push({ conversationId, overrideCwd });
+        return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
+      },
+    };
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield {
+          type: "usage",
+          usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
+        } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: () => {},
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    await warmService.warm("conv-warm-override", { cwd: "arch-rewrite" });
+
+    expect(effectiveCwdCalls).toHaveLength(1);
+    expect(effectiveCwdCalls[0]?.overrideCwd).toBe("arch-rewrite");
+  });
+
+  it("warm without opts.cwd → getEffectiveCwd called with undefined override", async () => {
+    const base = createInMemoryStore();
+    await base.append("conv-warm-no-override", [
+      { role: "user", chunks: [{ type: "text", text: "hi" }] },
+    ]);
+    const effectiveCwdCalls: Array<{ conversationId: string; overrideCwd: string | undefined }> =
+      [];
+    const store: ConversationStore = {
+      ...base,
+      async getEffectiveCwd(conversationId, overrideCwd) {
+        effectiveCwdCalls.push({ conversationId, overrideCwd });
+        return overrideCwd ?? (await base.getEffectiveCwd(conversationId));
+      },
+    };
+
+    const provider: ProviderContract = {
+      id: "p",
+      stream: async function* () {
+        yield {
+          type: "usage",
+          usage: { inputTokens: 1, outputTokens: 1, cacheReadTokens: 0, cacheWriteTokens: 0 },
+        } as ProviderEvent;
+        yield { type: "finish", reason: "stop" } as ProviderEvent;
+      },
+    };
+
+    const deps = {
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      emit: () => {},
+    };
+
+    const { activeConversations } = createSessionOrchestrator(deps);
+    const warmService = createWarmService(deps, activeConversations);
+
+    await warmService.warm("conv-warm-no-override");
+
+    expect(effectiveCwdCalls).toHaveLength(1);
+    expect(effectiveCwdCalls[0]?.overrideCwd).toBeUndefined();
+  });
 });
 
 // --- System prompt integration ---
 
 function createFakeSystemPromptService(
-	constructImpl: (
-		conversationId: string,
-		cwd: string,
-		context?: { readonly model?: string; readonly computerId?: string },
-	) => Promise<string>,
-	getWithMetaImpl: (conversationId: string) => Promise<{
-		readonly prompt: string | null;
-		readonly cwd: string | null;
-		readonly computerId: string | null;
-	}> = () => Promise.resolve({ prompt: null, cwd: null, computerId: null }),
+  constructImpl: (
+    conversationId: string,
+    cwd: string,
+    context?: { readonly model?: string; readonly computerId?: string },
+  ) => Promise<string>,
+  getWithMetaImpl: (conversationId: string) => Promise<{
+    readonly prompt: string | null;
+    readonly cwd: string | null;
+    readonly computerId: string | null;
+  }> = () => Promise.resolve({ prompt: null, cwd: null, computerId: null }),
 ): SystemPromptService {
-	return {
-		construct: constructImpl,
-		async get(conversationId) {
-			const meta = await getWithMetaImpl(conversationId);
-			return meta.prompt;
-		},
-		getWithMeta: getWithMetaImpl,
-		async getTemplate() {
-			return "";
-		},
-		async setTemplate() {},
-	};
+  return {
+    construct: constructImpl,
+    async get(conversationId) {
+      const meta = await getWithMetaImpl(conversationId);
+      return meta.prompt;
+    },
+    getWithMeta: getWithMetaImpl,
+    async getTemplate() {
+      return "";
+    },
+    async setTemplate() {},
+  };
 }
 
 describe("system prompt: regular turn flow", () => {
-	it("First turn: construct called — new conversation (meta null) → construct called with conversationId + cwd + model → result set on providerOpts.systemPrompt", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const constructCalls: Array<{
-			conversationId: string;
-			cwd: string;
-			model: string | undefined;
-		}> = [];
-		const getCalls: string[] = [];
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			resolveSystemPrompt: () =>
-				createFakeSystemPromptService(
-					async (conversationId, cwd, context) => {
-						constructCalls.push({
-							conversationId,
-							cwd,
-							model: context?.model,
-						});
-						return "CONSTRUCTED_PROMPT";
-					},
-					async (conversationId) => {
-						getCalls.push(conversationId);
-						return { prompt: null, cwd: null, computerId: null };
-					},
-				),
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-sp-first",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "/work/dir",
-			modelName: "my-model",
-		});
-
-		expect(constructCalls).toHaveLength(1);
-		expect(constructCalls[0]?.conversationId).toBe("conv-sp-first");
-		expect(constructCalls[0]?.cwd).toBe("/work/dir");
-		expect(constructCalls[0]?.model).toBe("my-model");
-		expect(getCalls).toHaveLength(0);
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.systemPrompt).toBe("CONSTRUCTED_PROMPT");
-	});
-
-	it("Subsequent turn: stored cwd === effective cwd → uses cached prompt (no construct)", async () => {
-		const store = createInMemoryStore();
-		// Seed an existing conversation so getConversationMeta returns non-null.
-		await store.append("conv-sp-sub", [
-			{ role: "user", chunks: [{ type: "text", text: "first" }] },
-			{ role: "assistant", chunks: [{ type: "text", text: "reply" }] },
-		]);
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const constructCalls: string[] = [];
-		const getWithMetaCalls: string[] = [];
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			resolveSystemPrompt: () =>
-				createFakeSystemPromptService(
-					async (conversationId) => {
-						constructCalls.push(conversationId);
-						return "SHOULD_NOT_BE_USED";
-					},
-					async (conversationId) => {
-						getWithMetaCalls.push(conversationId);
-						return { prompt: "PERSISTED_PROMPT", cwd: "/work/dir", computerId: null };
-					},
-				),
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-sp-sub",
-			text: "second",
-			onEvent: () => {},
-			cwd: "/work/dir",
-		});
-
-		expect(getWithMetaCalls).toHaveLength(1);
-		expect(getWithMetaCalls[0]).toBe("conv-sp-sub");
-		expect(constructCalls).toHaveLength(0);
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.systemPrompt).toBe("PERSISTED_PROMPT");
-	});
-
-	it("Subsequent turn: no stored prompt (getWithMeta returns null) → calls construct", async () => {
-		const store = createInMemoryStore();
-		await store.append("conv-sp-null", [
-			{ role: "user", chunks: [{ type: "text", text: "first" }] },
-			{ role: "assistant", chunks: [{ type: "text", text: "reply" }] },
-		]);
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const constructCalls: Array<{
-			conversationId: string;
-			cwd: string;
-			model: string | undefined;
-		}> = [];
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			resolveSystemPrompt: () =>
-				createFakeSystemPromptService(
-					async (conversationId, cwd, context) => {
-						constructCalls.push({ conversationId, cwd, model: context?.model });
-						return "RECONSTRUCTED_PROMPT";
-					},
-					async () => ({ prompt: null, cwd: null, computerId: null }),
-				),
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-sp-null",
-			text: "second",
-			onEvent: () => {},
-			cwd: "/work/dir",
-			modelName: "my-model",
-		});
-
-		expect(constructCalls).toHaveLength(1);
-		expect(constructCalls[0]?.conversationId).toBe("conv-sp-null");
-		expect(constructCalls[0]?.cwd).toBe("/work/dir");
-		expect(constructCalls[0]?.model).toBe("my-model");
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.systemPrompt).toBe("RECONSTRUCTED_PROMPT");
-	});
-
-	it("Subsequent turn: stored cwd ≠ effective cwd → calls construct with new cwd (prompt rebuilt)", async () => {
-		const store = createInMemoryStore();
-		await store.append("conv-sp-cwd-change", [
-			{ role: "user", chunks: [{ type: "text", text: "first" }] },
-			{ role: "assistant", chunks: [{ type: "text", text: "reply" }] },
-		]);
-
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const constructCalls: Array<{
-			conversationId: string;
-			cwd: string;
-			model: string | undefined;
-		}> = [];
-		const getWithMetaCalls: string[] = [];
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			resolveSystemPrompt: () =>
-				createFakeSystemPromptService(
-					async (conversationId, cwd, context) => {
-						constructCalls.push({ conversationId, cwd, model: context?.model });
-						return "REBUILT_PROMPT";
-					},
-					async (conversationId) => {
-						getWithMetaCalls.push(conversationId);
-						// Stored prompt was built against an OLD cwd.
-						return { prompt: "STALE_PROMPT", cwd: "/old/dir", computerId: null };
-					},
-				),
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-sp-cwd-change",
-			text: "second",
-			onEvent: () => {},
-			// Current turn's effective cwd differs from the stored cwd.
-			cwd: "/new/dir",
-			modelName: "my-model",
-		});
-
-		expect(getWithMetaCalls).toHaveLength(1);
-		expect(getWithMetaCalls[0]).toBe("conv-sp-cwd-change");
-
-		expect(constructCalls).toHaveLength(1);
-		expect(constructCalls[0]?.conversationId).toBe("conv-sp-cwd-change");
-		expect(constructCalls[0]?.cwd).toBe("/new/dir");
-		expect(constructCalls[0]?.model).toBe("my-model");
-
-		expect(captured).toHaveLength(1);
-		// The rebuilt prompt is used — NOT the stale cached one.
-		expect(captured[0]?.providerOpts?.systemPrompt).toBe("REBUILT_PROMPT");
-	});
-
-	it("Service unavailable: no system prompt — resolveSystemPrompt is undefined → providerOpts.systemPrompt is NOT set", async () => {
-		const store = createInMemoryStore();
-		const provider: ProviderContract = { id: "p", stream: async function* () {} };
-		const { captured, captureRunTurn } = createCapturingRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => provider,
-			resolveTools: () => [],
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			// resolveSystemPrompt omitted entirely
-		});
-
-		await orchestrator.handleMessage({
-			conversationId: "conv-sp-none",
-			text: "hi",
-			onEvent: () => {},
-			cwd: "/work",
-		});
-
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.providerOpts?.systemPrompt).toBeUndefined();
-	});
+  it("First turn: construct called — new conversation (meta null) → construct called with conversationId + cwd + model → result set on providerOpts.systemPrompt", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const constructCalls: Array<{
+      conversationId: string;
+      cwd: string;
+      model: string | undefined;
+    }> = [];
+    const getCalls: string[] = [];
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      resolveSystemPrompt: () =>
+        createFakeSystemPromptService(
+          async (conversationId, cwd, context) => {
+            constructCalls.push({
+              conversationId,
+              cwd,
+              model: context?.model,
+            });
+            return "CONSTRUCTED_PROMPT";
+          },
+          async (conversationId) => {
+            getCalls.push(conversationId);
+            return { prompt: null, cwd: null, computerId: null };
+          },
+        ),
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-sp-first",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "/work/dir",
+      modelName: "my-model",
+    });
+
+    expect(constructCalls).toHaveLength(1);
+    expect(constructCalls[0]?.conversationId).toBe("conv-sp-first");
+    expect(constructCalls[0]?.cwd).toBe("/work/dir");
+    expect(constructCalls[0]?.model).toBe("my-model");
+    expect(getCalls).toHaveLength(0);
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.systemPrompt).toBe("CONSTRUCTED_PROMPT");
+  });
+
+  it("Subsequent turn: stored cwd === effective cwd → uses cached prompt (no construct)", async () => {
+    const store = createInMemoryStore();
+    // Seed an existing conversation so getConversationMeta returns non-null.
+    await store.append("conv-sp-sub", [
+      { role: "user", chunks: [{ type: "text", text: "first" }] },
+      { role: "assistant", chunks: [{ type: "text", text: "reply" }] },
+    ]);
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const constructCalls: string[] = [];
+    const getWithMetaCalls: string[] = [];
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      resolveSystemPrompt: () =>
+        createFakeSystemPromptService(
+          async (conversationId) => {
+            constructCalls.push(conversationId);
+            return "SHOULD_NOT_BE_USED";
+          },
+          async (conversationId) => {
+            getWithMetaCalls.push(conversationId);
+            return { prompt: "PERSISTED_PROMPT", cwd: "/work/dir", computerId: null };
+          },
+        ),
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-sp-sub",
+      text: "second",
+      onEvent: () => {},
+      cwd: "/work/dir",
+    });
+
+    expect(getWithMetaCalls).toHaveLength(1);
+    expect(getWithMetaCalls[0]).toBe("conv-sp-sub");
+    expect(constructCalls).toHaveLength(0);
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.systemPrompt).toBe("PERSISTED_PROMPT");
+  });
+
+  it("Subsequent turn: no stored prompt (getWithMeta returns null) → calls construct", async () => {
+    const store = createInMemoryStore();
+    await store.append("conv-sp-null", [
+      { role: "user", chunks: [{ type: "text", text: "first" }] },
+      { role: "assistant", chunks: [{ type: "text", text: "reply" }] },
+    ]);
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const constructCalls: Array<{
+      conversationId: string;
+      cwd: string;
+      model: string | undefined;
+    }> = [];
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      resolveSystemPrompt: () =>
+        createFakeSystemPromptService(
+          async (conversationId, cwd, context) => {
+            constructCalls.push({ conversationId, cwd, model: context?.model });
+            return "RECONSTRUCTED_PROMPT";
+          },
+          async () => ({ prompt: null, cwd: null, computerId: null }),
+        ),
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-sp-null",
+      text: "second",
+      onEvent: () => {},
+      cwd: "/work/dir",
+      modelName: "my-model",
+    });
+
+    expect(constructCalls).toHaveLength(1);
+    expect(constructCalls[0]?.conversationId).toBe("conv-sp-null");
+    expect(constructCalls[0]?.cwd).toBe("/work/dir");
+    expect(constructCalls[0]?.model).toBe("my-model");
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.systemPrompt).toBe("RECONSTRUCTED_PROMPT");
+  });
+
+  it("Subsequent turn: stored cwd ≠ effective cwd → calls construct with new cwd (prompt rebuilt)", async () => {
+    const store = createInMemoryStore();
+    await store.append("conv-sp-cwd-change", [
+      { role: "user", chunks: [{ type: "text", text: "first" }] },
+      { role: "assistant", chunks: [{ type: "text", text: "reply" }] },
+    ]);
+
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const constructCalls: Array<{
+      conversationId: string;
+      cwd: string;
+      model: string | undefined;
+    }> = [];
+    const getWithMetaCalls: string[] = [];
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      resolveSystemPrompt: () =>
+        createFakeSystemPromptService(
+          async (conversationId, cwd, context) => {
+            constructCalls.push({ conversationId, cwd, model: context?.model });
+            return "REBUILT_PROMPT";
+          },
+          async (conversationId) => {
+            getWithMetaCalls.push(conversationId);
+            // Stored prompt was built against an OLD cwd.
+            return { prompt: "STALE_PROMPT", cwd: "/old/dir", computerId: null };
+          },
+        ),
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-sp-cwd-change",
+      text: "second",
+      onEvent: () => {},
+      // Current turn's effective cwd differs from the stored cwd.
+      cwd: "/new/dir",
+      modelName: "my-model",
+    });
+
+    expect(getWithMetaCalls).toHaveLength(1);
+    expect(getWithMetaCalls[0]).toBe("conv-sp-cwd-change");
+
+    expect(constructCalls).toHaveLength(1);
+    expect(constructCalls[0]?.conversationId).toBe("conv-sp-cwd-change");
+    expect(constructCalls[0]?.cwd).toBe("/new/dir");
+    expect(constructCalls[0]?.model).toBe("my-model");
+
+    expect(captured).toHaveLength(1);
+    // The rebuilt prompt is used — NOT the stale cached one.
+    expect(captured[0]?.providerOpts?.systemPrompt).toBe("REBUILT_PROMPT");
+  });
+
+  it("Service unavailable: no system prompt — resolveSystemPrompt is undefined → providerOpts.systemPrompt is NOT set", async () => {
+    const store = createInMemoryStore();
+    const provider: ProviderContract = { id: "p", stream: async function* () {} };
+    const { captured, captureRunTurn } = createCapturingRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => provider,
+      resolveTools: () => [],
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      // resolveSystemPrompt omitted entirely
+    });
+
+    await orchestrator.handleMessage({
+      conversationId: "conv-sp-none",
+      text: "hi",
+      onEvent: () => {},
+      cwd: "/work",
+    });
+
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.providerOpts?.systemPrompt).toBeUndefined();
+  });
 });
 
 describe("system prompt: compaction flow", () => {
-	function seedHistory(
-		store: ReturnType<typeof createInMemoryStore>,
-		conversationId: string,
-		count: number,
-	): void {
-		const messages: ChatMessage[] = [];
-		for (let i = 0; i < count; i++) {
-			messages.push({
-				role: i % 2 === 0 ? "user" : "assistant",
-				chunks: [{ type: "text", text: `message ${i}` }],
-			});
-		}
-		store.data.set(conversationId, messages);
-	}
-
-	it("Compaction: construct + append — compaction flow calls construct → result appended with COMPACTION_SYSTEM_PROMPT → combined string set as systemPrompt", async () => {
-		const store = createInMemoryStore();
-		seedHistory(store, "conv-compact-sp", 15);
-
-		const constructCalls: Array<{
-			conversationId: string;
-			cwd: string;
-			model: string | undefined;
-		}> = [];
-
-		let capturedSystemPrompt: string | undefined;
-		const provider: ProviderContract = {
-			id: "compaction-provider",
-			stream(_messages, _tools, opts) {
-				capturedSystemPrompt = opts?.systemPrompt;
-				return (async function* () {
-					yield { type: "text-delta", delta: "Summary text" } as ProviderEvent;
-					yield { type: "finish", reason: "stop" } as ProviderEvent;
-				})();
-			},
-		};
-
-		const compactionService = createCompactionService(
-			{
-				conversationStore: store,
-				resolveProvider: () => provider,
-				resolveTools: () => [],
-				applyToolsFilter: identityApplyToolsFilter,
-				runTurn,
-				resolveSystemPrompt: () =>
-					createFakeSystemPromptService(async (conversationId, cwd, context) => {
-						constructCalls.push({ conversationId, cwd, model: context?.model });
-						return "RECONSTRUCTED_PROMPT";
-					}),
-				emit: () => {},
-			},
-			new Set(),
-		);
-
-		const result = await compactionService.compact("conv-compact-sp", {
-			modelName: "compaction-model",
-		});
-
-		expect("summary" in result).toBe(true);
-		expect(constructCalls).toHaveLength(1);
-		expect(constructCalls[0]?.conversationId).toBe("conv-compact-sp");
-		expect(constructCalls[0]?.model).toBe("compaction-model");
-
-		// The system prompt sent to the provider must be the constructed prompt
-		// appended with the COMPACTION_SYSTEM_PROMPT.
-		expect(capturedSystemPrompt).toBeDefined();
-		expect(capturedSystemPrompt?.startsWith("RECONSTRUCTED_PROMPT\n\n")).toBe(true);
-		expect(capturedSystemPrompt).toContain("conversation summarizer");
-	});
-
-	it("Compaction: fallback when service unavailable — compaction flow with no service → COMPACTION_SYSTEM_PROMPT alone", async () => {
-		const store = createInMemoryStore();
-		seedHistory(store, "conv-compact-nosp", 15);
-
-		let capturedSystemPrompt: string | undefined;
-		const provider: ProviderContract = {
-			id: "compaction-provider",
-			stream(_messages, _tools, opts) {
-				capturedSystemPrompt = opts?.systemPrompt;
-				return (async function* () {
-					yield { type: "text-delta", delta: "Summary text" } as ProviderEvent;
-					yield { type: "finish", reason: "stop" } as ProviderEvent;
-				})();
-			},
-		};
-
-		const compactionService = createCompactionService(
-			{
-				conversationStore: store,
-				resolveProvider: () => provider,
-				resolveTools: () => [],
-				applyToolsFilter: identityApplyToolsFilter,
-				runTurn,
-				// resolveSystemPrompt omitted — service unavailable
-				emit: () => {},
-			},
-			new Set(),
-		);
-
-		const result = await compactionService.compact("conv-compact-nosp", {
-			modelName: "compaction-model",
-		});
-
-		expect("summary" in result).toBe(true);
-		expect(capturedSystemPrompt).toBeDefined();
-		// Must be the COMPACTION_SYSTEM_PROMPT alone — no constructed prefix.
-		expect(capturedSystemPrompt).toContain("conversation summarizer");
-		expect(capturedSystemPrompt?.startsWith("RECONSTRUCTED")).toBe(false);
-	});
+  function seedHistory(
+    store: ReturnType<typeof createInMemoryStore>,
+    conversationId: string,
+    count: number,
+  ): void {
+    const messages: ChatMessage[] = [];
+    for (let i = 0; i < count; i++) {
+      messages.push({
+        role: i % 2 === 0 ? "user" : "assistant",
+        chunks: [{ type: "text", text: `message ${i}` }],
+      });
+    }
+    store.data.set(conversationId, messages);
+  }
+
+  it("Compaction: construct + append — compaction flow calls construct → result appended with COMPACTION_SYSTEM_PROMPT → combined string set as systemPrompt", async () => {
+    const store = createInMemoryStore();
+    seedHistory(store, "conv-compact-sp", 15);
+
+    const constructCalls: Array<{
+      conversationId: string;
+      cwd: string;
+      model: string | undefined;
+    }> = [];
+
+    let capturedSystemPrompt: string | undefined;
+    const provider: ProviderContract = {
+      id: "compaction-provider",
+      stream(_messages, _tools, opts) {
+        capturedSystemPrompt = opts?.systemPrompt;
+        return (async function* () {
+          yield { type: "text-delta", delta: "Summary text" } as ProviderEvent;
+          yield { type: "finish", reason: "stop" } as ProviderEvent;
+        })();
+      },
+    };
+
+    const compactionService = createCompactionService(
+      {
+        conversationStore: store,
+        resolveProvider: () => provider,
+        resolveTools: () => [],
+        applyToolsFilter: identityApplyToolsFilter,
+        runTurn,
+        resolveSystemPrompt: () =>
+          createFakeSystemPromptService(async (conversationId, cwd, context) => {
+            constructCalls.push({ conversationId, cwd, model: context?.model });
+            return "RECONSTRUCTED_PROMPT";
+          }),
+        emit: () => {},
+      },
+      new Set(),
+    );
+
+    const result = await compactionService.compact("conv-compact-sp", {
+      modelName: "compaction-model",
+    });
+
+    expect("summary" in result).toBe(true);
+    expect(constructCalls).toHaveLength(1);
+    expect(constructCalls[0]?.conversationId).toBe("conv-compact-sp");
+    expect(constructCalls[0]?.model).toBe("compaction-model");
+
+    // The system prompt sent to the provider must be the constructed prompt
+    // appended with the COMPACTION_SYSTEM_PROMPT.
+    expect(capturedSystemPrompt).toBeDefined();
+    expect(capturedSystemPrompt?.startsWith("RECONSTRUCTED_PROMPT\n\n")).toBe(true);
+    expect(capturedSystemPrompt).toContain("conversation summarizer");
+  });
+
+  it("Compaction: fallback when service unavailable — compaction flow with no service → COMPACTION_SYSTEM_PROMPT alone", async () => {
+    const store = createInMemoryStore();
+    seedHistory(store, "conv-compact-nosp", 15);
+
+    let capturedSystemPrompt: string | undefined;
+    const provider: ProviderContract = {
+      id: "compaction-provider",
+      stream(_messages, _tools, opts) {
+        capturedSystemPrompt = opts?.systemPrompt;
+        return (async function* () {
+          yield { type: "text-delta", delta: "Summary text" } as ProviderEvent;
+          yield { type: "finish", reason: "stop" } as ProviderEvent;
+        })();
+      },
+    };
+
+    const compactionService = createCompactionService(
+      {
+        conversationStore: store,
+        resolveProvider: () => provider,
+        resolveTools: () => [],
+        applyToolsFilter: identityApplyToolsFilter,
+        runTurn,
+        // resolveSystemPrompt omitted — service unavailable
+        emit: () => {},
+      },
+      new Set(),
+    );
+
+    const result = await compactionService.compact("conv-compact-nosp", {
+      modelName: "compaction-model",
+    });
+
+    expect("summary" in result).toBe(true);
+    expect(capturedSystemPrompt).toBeDefined();
+    // Must be the COMPACTION_SYSTEM_PROMPT alone — no constructed prefix.
+    expect(capturedSystemPrompt).toContain("conversation summarizer");
+    expect(capturedSystemPrompt?.startsWith("RECONSTRUCTED")).toBe(false);
+  });
 });
diff --git a/packages/session-orchestrator/src/orchestrator.ts b/packages/session-orchestrator/src/orchestrator.ts
index 4aa77f7..a785645 100644
--- a/packages/session-orchestrator/src/orchestrator.ts
+++ b/packages/session-orchestrator/src/orchestrator.ts
@@ -1,78 +1,78 @@
 import type { ConversationStore } from "@dispatch/conversation-store";
 import type {
-	AgentEvent,
-	ChatMessage,
-	CompactionResult,
-	ConversationStatus,
-	EventHookDescriptor,
-	Logger,
-	ModelInfo,
-	ProviderContract,
-	ProviderEvent,
-	ProviderStreamOptions,
-	ReasoningEffort,
-	RetryStrategy,
-	RunTurnInput,
-	RunTurnResult,
-	ToolContract,
-	ToolDispatchPolicy,
-	UsageEvent,
+  AgentEvent,
+  ChatMessage,
+  CompactionResult,
+  ConversationStatus,
+  EventHookDescriptor,
+  Logger,
+  ModelInfo,
+  ProviderContract,
+  ProviderEvent,
+  ProviderStreamOptions,
+  ReasoningEffort,
+  RetryStrategy,
+  RunTurnInput,
+  RunTurnResult,
+  ToolContract,
+  ToolDispatchPolicy,
+  UsageEvent,
 } from "@dispatch/kernel";
 import { defineEventHook, defineService, type ServiceHandle } from "@dispatch/kernel";
 import type { MessageQueueService, QueuedMessage } from "@dispatch/message-queue";
 import type { SystemPromptService } from "@dispatch/system-prompt";
 import { createMetricsAccumulator } from "./metrics.js";
 import {
-	buildUserMessage,
-	defaultDispatchPolicy,
-	delayFor,
-	generateTurnId,
-	resolveModelName,
-	resolveReasoningEffort,
+  buildUserMessage,
+  defaultDispatchPolicy,
+  delayFor,
+  generateTurnId,
+  resolveModelName,
+  resolveReasoningEffort,
 } from "./pure.js";
 import type { ToolAssembly } from "./tools-filter.js";
 
 // --- Broadcast hub types ---
 
 export interface StartTurnInput {
-	readonly conversationId: string;
-	readonly text: string;
-	readonly modelName?: string;
-	readonly cwd?: string;
-	/**
-	 * The computer to execute this turn's tools on (SSH config alias). Mirrors
-	 * `cwd`: an explicit per-turn override resolved via `getEffectiveComputer`.
-	 * Omitted/`undefined` = use the persisted per-conversation / workspace
-	 * default (LOCAL when none set). The orchestrator never interprets it — it
-	 * forwards the alias string verbatim (like cwd forwards a path).
-	 */
-	readonly computerId?: string;
-	readonly reasoningEffort?: ReasoningEffort;
-	/**
-	 * The workspace this conversation belongs to. Defaults to `"default"` when
-	 * omitted. On the first turn for a new conversation, the workspaceId is
-	 * persisted (the workspace is auto-created if missing) so subsequent turns
-	 * resolve the effective cwd from the workspace's `defaultCwd`.
-	 */
-	readonly workspaceId?: string;
+  readonly conversationId: string;
+  readonly text: string;
+  readonly modelName?: string;
+  readonly cwd?: string;
+  /**
+   * The computer to execute this turn's tools on (SSH config alias). Mirrors
+   * `cwd`: an explicit per-turn override resolved via `getEffectiveComputer`.
+   * Omitted/`undefined` = use the persisted per-conversation / workspace
+   * default (LOCAL when none set). The orchestrator never interprets it — it
+   * forwards the alias string verbatim (like cwd forwards a path).
+   */
+  readonly computerId?: string;
+  readonly reasoningEffort?: ReasoningEffort;
+  /**
+   * The workspace this conversation belongs to. Defaults to `"default"` when
+   * omitted. On the first turn for a new conversation, the workspaceId is
+   * persisted (the workspace is auto-created if missing) so subsequent turns
+   * resolve the effective cwd from the workspace's `defaultCwd`.
+   */
+  readonly workspaceId?: string;
 }
 
 export type StartTurnResult =
-	| { readonly started: true; readonly turnId: string }
-	| { readonly started: false; readonly reason: "already-active" };
+  | { readonly started: true; readonly turnId: string }
+  | { readonly started: false; readonly reason: "already-active" };
 
 /** Input to `SessionOrchestrator.enqueue` — the single entry transports call. */
 export interface EnqueueInput {
-	readonly conversationId: string;
-	readonly text: string;
-	/** Workspace to stamp on a new conversation. Defaults to `"default"`. */
-	readonly workspaceId?: string;
-	/**
-	 * Per-turn computer override (SSH alias), threaded to `startTurn` when the
-	 * conversation is idle (the message starts a turn). Additive optional —
-	 * mirrors `workspaceId` on this type (enqueue does not carry `cwd`).
-	 */
-	readonly computerId?: string;
+  readonly conversationId: string;
+  readonly text: string;
+  /** Workspace to stamp on a new conversation. Defaults to `"default"`. */
+  readonly workspaceId?: string;
+  /**
+   * Per-turn computer override (SSH alias), threaded to `startTurn` when the
+   * conversation is idle (the message starts a turn). Additive optional —
+   * mirrors `workspaceId` on this type (enqueue does not carry `cwd`).
+   */
+  readonly computerId?: string;
 }
 
 /**
@@ -84,41 +84,41 @@ export interface EnqueueInput {
  * is dropped, see `enqueue` docs).
  */
 export interface EnqueueResult {
-	readonly startedTurn: boolean;
-	readonly queue: readonly QueuedMessage[];
+  readonly startedTurn: boolean;
+  readonly queue: readonly QueuedMessage[];
 }
 
 export type TurnEventListener = (event: AgentEvent) => void;
 
 interface ActiveTurn {
-	buffer: AgentEvent[];
-	turnId: string;
-	/** Aborts this turn's kernel runTurn (closeConversation). */
-	controller: AbortController;
+  buffer: AgentEvent[];
+  turnId: string;
+  /** Aborts this turn's kernel runTurn (closeConversation). */
+  controller: AbortController;
 }
 
 // --- Lifecycle event hooks ---
 
 /** Context carried on turn-lifecycle events, enough to replicate the turn's request prefix. */
 export interface TurnLifecyclePayload {
-	readonly conversationId: string;
-	readonly cwd?: string;
-	/** The computer this turn executes on (SSH alias), mirroring `cwd`. */
-	readonly computerId?: string;
-	readonly modelName?: string;
+  readonly conversationId: string;
+  readonly cwd?: string;
+  /** The computer this turn executes on (SSH alias), mirroring `cwd`. */
+  readonly computerId?: string;
+  readonly modelName?: string;
 }
 
 /** Fired when a turn STARTS driving a conversation (consumers cancel warming timers). */
 export const turnStarted: EventHookDescriptor<TurnLifecyclePayload> =
-	defineEventHook<TurnLifecyclePayload>("session-orchestrator/turn-started");
+  defineEventHook<TurnLifecyclePayload>("session-orchestrator/turn-started");
 
 /** Fired when a turn SETTLES (sealed) for a conversation (consumers arm warming timers). */
 export const turnSettled: EventHookDescriptor<TurnLifecyclePayload> =
-	defineEventHook<TurnLifecyclePayload>("session-orchestrator/turn-settled");
+  defineEventHook<TurnLifecyclePayload>("session-orchestrator/turn-settled");
 
 /** Payload for the conversationClosed bus event. */
 export interface ConversationClosedPayload {
-	readonly conversationId: string;
+  readonly conversationId: string;
 }
 
 /**
@@ -127,17 +127,17 @@ export interface ConversationClosedPayload {
  * disables its schedule). Emitted by `SessionOrchestrator.closeConversation`.
  */
 export const conversationClosed: EventHookDescriptor<ConversationClosedPayload> =
-	defineEventHook<ConversationClosedPayload>("session-orchestrator/conversation-closed");
+  defineEventHook<ConversationClosedPayload>("session-orchestrator/conversation-closed");
 
 /** Payload for the conversationOpened bus event. */
 export interface ConversationOpenedPayload {
-	readonly conversationId: string;
-	/**
-	 * The conversation's actual persisted workspace id (resolved from the
-	 * store, not the per-turn start option), so a frontend can open/focus the
-	 * tab in the correct workspace. Falls back to `"default"`.
-	 */
-	readonly workspaceId: string;
+  readonly conversationId: string;
+  /**
+   * The conversation's actual persisted workspace id (resolved from the
+   * store, not the per-turn start option), so a frontend can open/focus the
+   * tab in the correct workspace. Falls back to `"default"`.
+   */
+  readonly workspaceId: string;
 }
 
 /**
@@ -147,18 +147,18 @@ export interface ConversationOpenedPayload {
  * open/focus a tab — the backend just signals.
  */
 export const conversationOpened: EventHookDescriptor<ConversationOpenedPayload> =
-	defineEventHook<ConversationOpenedPayload>("session-orchestrator/conversation-opened");
+  defineEventHook<ConversationOpenedPayload>("session-orchestrator/conversation-opened");
 
 /** Payload for the conversationStatusChanged bus event. */
 export interface ConversationStatusChangedPayload {
-	readonly conversationId: string;
-	readonly status: ConversationStatus;
-	/**
-	 * The conversation's actual persisted workspace id (resolved from the
-	 * store, not the per-turn start option), so a frontend can sync the tab
-	 * in the correct workspace. Falls back to `"default"`.
-	 */
-	readonly workspaceId: string;
+  readonly conversationId: string;
+  readonly status: ConversationStatus;
+  /**
+   * The conversation's actual persisted workspace id (resolved from the
+   * store, not the per-turn start option), so a frontend can sync the tab
+   * in the correct workspace. Falls back to `"default"`.
+   */
+  readonly workspaceId: string;
 }
 
 /**
@@ -167,16 +167,16 @@ export interface ConversationStatusChangedPayload {
  * message to all connected frontend clients so tabs sync across devices.
  */
 export const conversationStatusChanged: EventHookDescriptor<ConversationStatusChangedPayload> =
-	defineEventHook<ConversationStatusChangedPayload>(
-		"session-orchestrator/conversation-status-changed",
-	);
+  defineEventHook<ConversationStatusChangedPayload>(
+    "session-orchestrator/conversation-status-changed",
+  );
 
 /** Payload for the conversationCompacted bus event. */
 export interface ConversationCompactedPayload {
-	readonly conversationId: string;
-	readonly newConversationId: string;
-	readonly messagesSummarized: number;
-	readonly messagesKept: number;
+  readonly conversationId: string;
+  readonly newConversationId: string;
+  readonly messagesSummarized: number;
+  readonly messagesKept: number;
 }
 
 /**
@@ -185,163 +185,163 @@ export interface ConversationCompactedPayload {
  * broadcasts a `conversation.compacted` WS message so the FE reloads history.
  */
 export const conversationCompacted: EventHookDescriptor<ConversationCompactedPayload> =
-	defineEventHook<ConversationCompactedPayload>("session-orchestrator/conversation-compacted");
+  defineEventHook<ConversationCompactedPayload>("session-orchestrator/conversation-compacted");
 
 /** Payload for the warmCompleted bus event. */
 export interface WarmCompletedPayload {
-	readonly conversationId: string;
-	readonly usage: WarmResult;
+  readonly conversationId: string;
+  readonly usage: WarmResult;
 }
 
 /** Fired when a warm probe succeeds (both automatic and manual paths). */
 export const warmCompleted: EventHookDescriptor<WarmCompletedPayload> =
-	defineEventHook<WarmCompletedPayload>("session-orchestrator/warm-completed");
+  defineEventHook<WarmCompletedPayload>("session-orchestrator/warm-completed");
 
 // --- Warm service ---
 
 export interface WarmResult {
-	readonly inputTokens: number;
-	readonly outputTokens: number;
-	readonly cacheReadTokens: number;
-	readonly cacheWriteTokens: number;
+  readonly inputTokens: number;
+  readonly outputTokens: number;
+  readonly cacheReadTokens: number;
+  readonly cacheWriteTokens: number;
 }
 
 export interface WarmService {
-	readonly warm: (
-		conversationId: string,
-		opts?: { readonly cwd?: string; readonly modelName?: string },
-	) => Promise<WarmResult | { readonly error: string }>;
+  readonly warm: (
+    conversationId: string,
+    opts?: { readonly cwd?: string; readonly modelName?: string },
+  ) => Promise<WarmResult | { readonly error: string }>;
 }
 
 export const cacheWarmHandle: ServiceHandle<WarmService> = defineService<WarmService>(
-	"session-orchestrator/warm",
+  "session-orchestrator/warm",
 );
 
 // --- Compaction service ---
 
 export interface CompactionService {
-	/**
-	 * Compact a conversation: summarize old messages and replace history with
-	 * the summary + the most recent `keepLastN` messages. Returns the result
-	 * or an error object. No-ops if the conversation is too short (≤ keepLastN
-	 * messages). When `auto` is true, checks the compact-threshold setting and
-	 * only compacts if the last turn's input tokens exceeded it.
-	 */
-	readonly compact: (
-		conversationId: string,
-		opts?: { readonly keepLastN?: number; readonly modelName?: string; readonly auto?: boolean },
-	) => Promise<CompactionResult | { readonly error: string }>;
+  /**
+   * Compact a conversation: summarize old messages and replace history with
+   * the summary + the most recent `keepLastN` messages. Returns the result
+   * or an error object. No-ops if the conversation is too short (≤ keepLastN
+   * messages). When `auto` is true, checks the compact-threshold setting and
+   * only compacts if the last turn's input tokens exceeded it.
+   */
+  readonly compact: (
+    conversationId: string,
+    opts?: { readonly keepLastN?: number; readonly modelName?: string; readonly auto?: boolean },
+  ) => Promise<CompactionResult | { readonly error: string }>;
 }
 
 export const compactionHandle: ServiceHandle<CompactionService> = defineService<CompactionService>(
-	"session-orchestrator/compaction",
+  "session-orchestrator/compaction",
 );
 
 export interface SessionOrchestrator {
-	startTurn(input: StartTurnInput): StartTurnResult;
-	/**
-	 * The single entry transports call to deliver a user message. Owns the
-	 * idle→startTurn vs active→queue decision (no separate `isActive` race —
-	 * `startTurn`'s single-flight guard is authoritative). When the conversation
-	 * is idle, starts a turn (the message is the opening prompt). When active,
-	 * enqueues onto the steering queue (if the message-queue extension is
-	 * loaded); with no queue extension loaded the message is dropped and the
-	 * returned snapshot is empty (degraded — feature off).
-	 */
-	enqueue(input: EnqueueInput): EnqueueResult;
-	subscribe(conversationId: string, listener: TurnEventListener): () => void;
-	isActive(conversationId: string): boolean;
-	/**
-	 * Explicitly close a conversation (the user closed its tab — distinct from a
-	 * socket disconnect, which never touches the turn): aborts any in-flight turn
-	 * (the kernel finishes with `finishReason: "aborted"`, partial messages are
-	 * persisted and the turn seals normally) and emits the `conversationClosed`
-	 * hook so per-conversation background work (cache-warming) stops.
-	 * Idempotent — closing an idle/unknown conversation just emits the hook.
-	 */
-	closeConversation(conversationId: string): { readonly abortedTurn: boolean };
-	/**
-	 * Stop an in-flight generation WITHOUT closing the conversation. Aborts
-	 * the turn's AbortController — the kernel finishes with
-	 * `finishReason: "aborted"`, partial messages are persisted, and the turn
-	 * seals normally (status transitions active → idle via the normal settle
-	 * path). Idempotent — stopping an idle/unknown conversation is a no-op.
-	 */
-	stopTurn(conversationId: string): { readonly abortedTurn: boolean };
-	handleMessage(input: {
-		conversationId: string;
-		text: string;
-		onEvent: (event: AgentEvent) => void;
-		modelName?: string;
-		cwd?: string;
-		computerId?: string;
-		reasoningEffort?: ReasoningEffort;
-		workspaceId?: string;
-	}): Promise<void>;
+  startTurn(input: StartTurnInput): StartTurnResult;
+  /**
+   * The single entry transports call to deliver a user message. Owns the
+   * idle→startTurn vs active→queue decision (no separate `isActive` race —
+   * `startTurn`'s single-flight guard is authoritative). When the conversation
+   * is idle, starts a turn (the message is the opening prompt). When active,
+   * enqueues onto the steering queue (if the message-queue extension is
+   * loaded); with no queue extension loaded the message is dropped and the
+   * returned snapshot is empty (degraded — feature off).
+   */
+  enqueue(input: EnqueueInput): EnqueueResult;
+  subscribe(conversationId: string, listener: TurnEventListener): () => void;
+  isActive(conversationId: string): boolean;
+  /**
+   * Explicitly close a conversation (the user closed its tab — distinct from a
+   * socket disconnect, which never touches the turn): aborts any in-flight turn
+   * (the kernel finishes with `finishReason: "aborted"`, partial messages are
+   * persisted and the turn seals normally) and emits the `conversationClosed`
+   * hook so per-conversation background work (cache-warming) stops.
+   * Idempotent — closing an idle/unknown conversation just emits the hook.
+   */
+  closeConversation(conversationId: string): { readonly abortedTurn: boolean };
+  /**
+   * Stop an in-flight generation WITHOUT closing the conversation. Aborts
+   * the turn's AbortController — the kernel finishes with
+   * `finishReason: "aborted"`, partial messages are persisted, and the turn
+   * seals normally (status transitions active → idle via the normal settle
+   * path). Idempotent — stopping an idle/unknown conversation is a no-op.
+   */
+  stopTurn(conversationId: string): { readonly abortedTurn: boolean };
+  handleMessage(input: {
+    conversationId: string;
+    text: string;
+    onEvent: (event: AgentEvent) => void;
+    modelName?: string;
+    cwd?: string;
+    computerId?: string;
+    reasoningEffort?: ReasoningEffort;
+    workspaceId?: string;
+  }): Promise<void>;
 }
 
 export const sessionOrchestratorHandle = defineService<SessionOrchestrator>(
-	"session-orchestrator/orchestrator",
+  "session-orchestrator/orchestrator",
 );
 
 export interface SessionOrchestratorDeps {
-	readonly conversationStore: ConversationStore;
-	readonly resolveProvider: () => ProviderContract;
-	readonly resolveTools: () => readonly ToolContract[];
-	readonly resolveDispatch?: () => ToolDispatchPolicy;
-	readonly resolveModel?: (
-		modelName: string,
-	) => { provider: ProviderContract; model: string } | undefined;
-	/**
-	 * Resolve full `ModelInfo` (including `contextWindow`) for a model name.
-	 * Used by the compaction service to calculate the auto-compact threshold
-	 * as a percentage of the context window.
-	 */
-	readonly resolveModelInfo?: (modelName: string) => Promise<ModelInfo | undefined>;
-	readonly runTurn: (input: RunTurnInput) => Promise<RunTurnResult>;
-	/**
-	 * Lazily resolves the message-queue service (the steering queue), or
-	 * `undefined` when the message-queue extension isn't loaded (the feature
-	 * degrades off: no `drainSteering`, no post-seal carry, `enqueue` drops
-	 * messages when active). host-bin wires this via `host.getService`; the
-	 * orchestrator calls it per-turn / per-enqueue so activation order with the
-	 * message-queue extension doesn't matter. Injected (not ambient) so a turn
-	 * stays reproducible from its inputs and tests use a fake queue.
-	 */
-	readonly resolveQueue?: () => MessageQueueService | undefined;
-	/**
-	 * Lazily resolves the compaction service, or `undefined` when not loaded.
-	 * Used for automatic compaction after a turn settles (if the compact
-	 * threshold is exceeded). Lazy so activation order doesn't matter.
-	 */
-	readonly resolveCompaction?: () => CompactionService | undefined;
-	/**
-	 * Lazily resolves the system-prompt service, or `undefined` when the
-	 * system-prompt extension isn't loaded. Used to construct the per-
-	 * conversation system prompt once (first turn) and reuse it (cache-safe) on
-	 * subsequent turns, and to reconstruct it on compaction. Lazy so activation
-	 * order doesn't matter.
-	 */
-	readonly resolveSystemPrompt?: () => SystemPromptService | undefined;
-	/** Apply the per-turn tools filter chain. Injected for testability. */
-	readonly applyToolsFilter: (assembly: ToolAssembly) => Promise<ToolAssembly>;
-	/** Base logger (auto-scoped to this extension); childed per turn for span capture. */
-	readonly logger?: Logger;
-	/** Injected monotonic-ish clock (ms) forwarded to RunTurnInput for timing events. */
-	readonly now?: () => number;
-	/** Emit a lifecycle event hook to subscribers. Injected from host. */
-	readonly emit?: <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload) => void;
+  readonly conversationStore: ConversationStore;
+  readonly resolveProvider: () => ProviderContract;
+  readonly resolveTools: () => readonly ToolContract[];
+  readonly resolveDispatch?: () => ToolDispatchPolicy;
+  readonly resolveModel?: (
+    modelName: string,
+  ) => { provider: ProviderContract; model: string } | undefined;
+  /**
+   * Resolve full `ModelInfo` (including `contextWindow`) for a model name.
+   * Used by the compaction service to calculate the auto-compact threshold
+   * as a percentage of the context window.
+   */
+  readonly resolveModelInfo?: (modelName: string) => Promise<ModelInfo | undefined>;
+  readonly runTurn: (input: RunTurnInput) => Promise<RunTurnResult>;
+  /**
+   * Lazily resolves the message-queue service (the steering queue), or
+   * `undefined` when the message-queue extension isn't loaded (the feature
+   * degrades off: no `drainSteering`, no post-seal carry, `enqueue` drops
+   * messages when active). host-bin wires this via `host.getService`; the
+   * orchestrator calls it per-turn / per-enqueue so activation order with the
+   * message-queue extension doesn't matter. Injected (not ambient) so a turn
+   * stays reproducible from its inputs and tests use a fake queue.
+   */
+  readonly resolveQueue?: () => MessageQueueService | undefined;
+  /**
+   * Lazily resolves the compaction service, or `undefined` when not loaded.
+   * Used for automatic compaction after a turn settles (if the compact
+   * threshold is exceeded). Lazy so activation order doesn't matter.
+   */
+  readonly resolveCompaction?: () => CompactionService | undefined;
+  /**
+   * Lazily resolves the system-prompt service, or `undefined` when the
+   * system-prompt extension isn't loaded. Used to construct the per-
+   * conversation system prompt once (first turn) and reuse it (cache-safe) on
+   * subsequent turns, and to reconstruct it on compaction. Lazy so activation
+   * order doesn't matter.
+   */
+  readonly resolveSystemPrompt?: () => SystemPromptService | undefined;
+  /** Apply the per-turn tools filter chain. Injected for testability. */
+  readonly applyToolsFilter: (assembly: ToolAssembly) => Promise<ToolAssembly>;
+  /** Base logger (auto-scoped to this extension); childed per turn for span capture. */
+  readonly logger?: Logger;
+  /** Injected monotonic-ish clock (ms) forwarded to RunTurnInput for timing events. */
+  readonly now?: () => number;
+  /** Emit a lifecycle event hook to subscribers. Injected from host. */
+  readonly emit?: <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload) => void;
 }
 
 /** Deps for the warm service — emit is REQUIRED so warmCompleted is never silently dropped. */
 export type WarmServiceDeps = SessionOrchestratorDeps & {
-	readonly emit: <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload) => void;
+  readonly emit: <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload) => void;
 };
 
 export interface SessionOrchestratorBundle {
-	readonly orchestrator: SessionOrchestrator;
-	/** The shared active-conversations set, for use by createWarmService. */
-	readonly activeConversations: ReadonlySet<string>;
+  readonly orchestrator: SessionOrchestrator;
+  /** The shared active-conversations set, for use by createWarmService. */
+  readonly activeConversations: ReadonlySet<string>;
 }
 
 /**
@@ -354,848 +354,848 @@ export interface SessionOrchestratorBundle {
  * turn `aborted`). The kernel imports no timer; this is the shell-provided I/O.
  */
 export function createRetryStrategy(): RetryStrategy {
-	const sleep = (ms: number, signal: AbortSignal): Promise<void> => {
-		return new Promise((resolve, reject) => {
-			if (signal.aborted) {
-				reject(new Error("aborted"));
-				return;
-			}
-			const timer = setTimeout(() => {
-				signal.removeEventListener("abort", onAbort);
-				resolve();
-			}, ms);
-			const onAbort = () => {
-				clearTimeout(timer);
-				reject(new Error("aborted"));
-			};
-			signal.addEventListener("abort", onAbort, { once: true });
-		});
-	};
-	return { delayFor, sleep };
+  const sleep = (ms: number, signal: AbortSignal): Promise<void> => {
+    return new Promise((resolve, reject) => {
+      if (signal.aborted) {
+        reject(new Error("aborted"));
+        return;
+      }
+      const timer = setTimeout(() => {
+        signal.removeEventListener("abort", onAbort);
+        resolve();
+      }, ms);
+      const onAbort = () => {
+        clearTimeout(timer);
+        reject(new Error("aborted"));
+      };
+      signal.addEventListener("abort", onAbort, { once: true });
+    });
+  };
+  return { delayFor, sleep };
 }
 
 export function createSessionOrchestrator(
-	deps: SessionOrchestratorDeps,
+  deps: SessionOrchestratorDeps,
 ): SessionOrchestratorBundle {
-	const activeConversations = new Set<string>();
-	const subscribers = new Map<string, Set<TurnEventListener>>();
-	const activeTurns = new Map<string, ActiveTurn>();
-	// One stateless retry strategy shared by every turn (delayFor is pure; sleep
-	// is a stateless setTimeout closure). Wired into each RunTurnInput.retry.
-	const retryStrategy = createRetryStrategy();
-
-	function emitToHub(conversationId: string, event: AgentEvent): void {
-		const turn = activeTurns.get(conversationId);
-		if (turn !== undefined) {
-			turn.buffer.push(event);
-		}
-		const listeners = subscribers.get(conversationId);
-		if (listeners !== undefined) {
-			for (const listener of listeners) {
-				listener(event);
-			}
-		}
-	}
-
-	/**
-	 * Post-seal carry: if a steering queue is available and non-empty, drain it,
-	 * combine, and start a NEW detached turn whose opening `user-message` carries
-	 * the combined text (no `steering` event — that's only for mid-turn drain).
-	 * Returns true iff a new turn was started. Called from `runTurnDetached`'s
-	 * finally AFTER `activeTurns.delete` (so the new turn's single-flight guard
-	 * passes) and BEFORE `activeConversations.delete` (skipped when carried, since
-	 * the new turn re-adds it). May chain — the new turn's own finally re-checks.
-	 */
-	function tryCarryQueue(conversationId: string): boolean {
-		const queue = deps.resolveQueue?.();
-		if (queue === undefined) return false;
-		if (queue.getQueue(conversationId).length === 0) return false;
-		const drained = queue.drain(conversationId);
-		const combined = drained.map((q) => q.text).join("\n\n");
-		const result = orchestrator.startTurn({ conversationId, text: combined });
-		return result.started;
-	}
-
-	function runTurnDetached(
-		conversationId: string,
-		text: string,
-		modelName: string | undefined,
-		cwd: string | undefined,
-		computerId: string | undefined,
-		reasoningEffortOverride: ReasoningEffort | undefined,
-		workspaceId: string,
-	): void {
-		const turnId = generateTurnId();
-		const controller = new AbortController();
-		activeTurns.set(conversationId, { buffer: [], turnId, controller });
-		activeConversations.add(conversationId);
-
-		emitToHub(conversationId, { type: "user-message", conversationId, turnId, text });
-
-		// For a NEW conversation the workspace MUST be assigned (persisted)
-		// BEFORE getEffectiveCwd runs, so the effective cwd resolves against
-		// the intended workspace's defaultCwd rather than the stale "default"
-		// workspace returned by getWorkspaceId for a not-yet-persisted
-		// conversation. Detect newness via getConversationMeta === null
-		// (equivalent to history.length === 0 in practice). Existing
-		// conversations keep their assigned workspace — never overwritten.
-		// The newness flag is also reused to decide whether to construct
-		// (first turn) or get (subsequent turn) the system prompt — see the
-		// providerOpts assembly below.
-		const workspaceSetupPromise = (async (): Promise<boolean> => {
-			const meta = await deps.conversationStore.getConversationMeta(conversationId);
-			if (meta === null) {
-				await deps.conversationStore.ensureWorkspace(workspaceId);
-				await deps.conversationStore.setWorkspaceId(conversationId, workspaceId);
-				return true;
-			}
-			return false;
-		})();
-
-		// ALWAYS resolve the effective cwd through getEffectiveCwd, passing the
-		// per-turn cwd as the overrideCwd when present. A relative per-turn cwd
-		// (e.g. "arch-rewrite") must be resolved against the workspace's
-		// defaultCwd via the same workspace-relative algorithm the persisted cwd
-		// uses — NOT used raw (which would resolve against process.cwd() and
-		// break). When cwd is undefined, getEffectiveCwd reads the persisted cwd.
-		// Chained after workspaceSetupPromise so the workspace is assigned
-		// first for new conversations (the timing invariant this enforces).
-		const effectiveCwdPromise = workspaceSetupPromise.then(() =>
-			deps.conversationStore.getEffectiveCwd(conversationId, cwd).then((c) => c ?? undefined),
-		);
-
-		// Resolve the effective computer the SAME way cwd resolves — pass the
-		// per-turn computerId as the overrideAlias. When computerId is
-		// undefined, getEffectiveComputer reads the persisted per-conversation
-		// computerId → workspace defaultComputerId → null (LOCAL). Chained
-		// after workspaceSetupPromise (same timing invariant as cwd). The
-		// orchestrator never interprets the alias — it forwards the string
-		// verbatim (like cwd forwards a path). Mirrors effectiveCwdPromise.
-		const effectiveComputerIdPromise = workspaceSetupPromise.then(() =>
-			deps.conversationStore
-				.getEffectiveComputer(conversationId, computerId)
-				.then((c) => c ?? undefined),
-		);
-
-		const storedEffortPromise = deps.conversationStore.getReasoningEffort(conversationId);
-		// Resolve the persisted model (if any) in parallel with the other
-		// per-conversation reads. The effective model name is
-		// per-turn override → persisted → (undefined → default provider), the
-		// same resolution chain as `resolveReasoningEffort`.
-		const storedModelPromise = deps.conversationStore.getModel(conversationId);
-
-		const payloadPromise = Promise.all([
-			effectiveCwdPromise,
-			effectiveComputerIdPromise,
-			storedEffortPromise,
-			storedModelPromise,
-		]).then(([effectiveCwd, effectiveComputerId, _storedEffort, storedModel]) => {
-			const effectiveModelName = resolveModelName(modelName, storedModel);
-			return {
-				conversationId,
-				...(effectiveCwd !== undefined ? { cwd: effectiveCwd } : {}),
-				...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
-				...(effectiveModelName !== undefined ? { modelName: effectiveModelName } : {}),
-			};
-		});
-
-		payloadPromise.then((payload) => {
-			deps.emit?.(turnStarted, payload);
-			// Resolve the persisted workspace id (not the per-turn start option)
-			// before emitting so the broadcast carries the correct workspace.
-			void deps.conversationStore.getWorkspaceId(conversationId).then((workspaceId) => {
-				deps.emit?.(conversationStatusChanged, {
-					conversationId,
-					status: "active",
-					workspaceId,
-				});
-			});
-			void deps.conversationStore.setConversationStatus(conversationId, "active");
-		});
-
-		void (async () => {
-			let sealed = false;
-			try {
-				const [effectiveCwd, effectiveComputerId, storedEffort, isNewConversation, storedModel] =
-					await Promise.all([
-						effectiveCwdPromise,
-						effectiveComputerIdPromise,
-						storedEffortPromise,
-						workspaceSetupPromise,
-						storedModelPromise,
-					]);
-
-				if (cwd !== undefined) {
-					await deps.conversationStore.setCwd(conversationId, cwd);
-				}
-
-				// Persist the per-turn computer override, mirroring the cwd
-				// persistence above. Only stamped when a computerId was actually
-				// provided — NOT when it resolved to undefined (LOCAL) via the
-				// workspace default. Idempotent when the value is unchanged.
-				if (computerId !== undefined) {
-					await deps.conversationStore.setComputerId(conversationId, computerId);
-				}
-
-				const resolvedEffort = resolveReasoningEffort(reasoningEffortOverride, storedEffort);
-				// Effective model name: per-turn override → persisted → undefined
-				// (→ default provider). Resolved here so every downstream consumer
-				// (resolveModel, system prompt, payload) sees the same model as if
-				// the caller had passed it explicitly.
-				const effectiveModelName = resolveModelName(modelName, storedModel);
-
-				const history = await deps.conversationStore.load(conversationId);
-				const userMsg = buildUserMessage(text);
-
-				// Workspace assignment for new conversations happens BEFORE
-				// effective-cwd resolution (see workspaceSetupPromise above) so
-				// getEffectiveCwd resolves against the intended workspace, not
-				// the stale "default". The history-load + append flow below is
-				// otherwise unchanged.
-
-				let provider: ProviderContract;
-				let modelOverride: string | undefined;
-
-				if (effectiveModelName !== undefined && deps.resolveModel !== undefined) {
-					const resolved = deps.resolveModel(effectiveModelName);
-					if (resolved === undefined) {
-						emitToHub(conversationId, {
-							type: "error",
-							conversationId,
-							turnId,
-							message: `unknown model: ${effectiveModelName}`,
-						});
-						return;
-					}
-					provider = resolved.provider;
-					modelOverride = resolved.model;
-					// Persist the resolved model so it sticks for future turns
-					// and browser sessions (per-conversation model persistence).
-					// Only stamped when a model was actually used — NOT on the
-					// default-provider fallthrough (nothing to persist). Idempotent
-					// when the value is unchanged (re-stamps the same persisted
-					// model). The early `return` above means an unknown model is
-					// never persisted.
-					await deps.conversationStore.setModel(conversationId, effectiveModelName);
-				} else {
-					provider = deps.resolveProvider();
-				}
-
-				const baseTools = deps.resolveTools();
-				const assembled = await deps.applyToolsFilter({
-					tools: baseTools,
-					conversationId,
-					...(effectiveCwd !== undefined ? { cwd: effectiveCwd } : {}),
-					...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
-				});
-				const dispatch = deps.resolveDispatch?.() ?? defaultDispatchPolicy();
-				const turnLogger = deps.logger?.child({ conversationId, turnId });
-				const metrics = createMetricsAccumulator();
-
-				const emitAndAccumulate = (event: AgentEvent): void => {
-					metrics.ingest(event);
-					emitToHub(conversationId, event);
-				};
-
-				// Resolve the system prompt for this turn (cache-safe). On the
-				// FIRST turn of a new conversation, construct it once (resolves all
-				// template variables + persists the result). On subsequent turns,
-				// reuse the persisted prompt via `getWithMeta` — but ONLY when the
-				// stored cwd matches the current effective cwd. If the cwd changed
-				// since the prompt was constructed (or no prompt was ever stored),
-				// reconstruct against the new cwd so the prompt is never stale.
-				// This preserves the cache-safe design (construct once per cwd,
-				// reuse on subsequent turns with the same cwd) while fixing the bug
-				// where a cwd change left the prompt stale. When the system-prompt
-				// service isn't loaded, no system prompt is sent (current behavior
-				// preserved).
-				const systemPromptService = deps.resolveSystemPrompt?.();
-				let systemPrompt: string | undefined;
-				if (systemPromptService !== undefined) {
-					if (isNewConversation) {
-						systemPrompt = await systemPromptService.construct(
-							conversationId,
-							effectiveCwd ?? process.cwd(),
-							{
-								...(effectiveModelName !== undefined ? { model: effectiveModelName } : {}),
-								...(workspaceId !== undefined ? { workspaceId } : {}),
-								...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
-							},
-						);
-					} else {
-						const meta = await systemPromptService.getWithMeta(conversationId);
-						const currentCwd = effectiveCwd ?? process.cwd();
-						const currentComputerId = effectiveComputerId ?? null;
-						// Invalidate when cwd OR computerId changed (switching computers
-						// must rebuild the prompt against the remote OS/hostname).
-						if (
-							meta.prompt !== null &&
-							meta.cwd === currentCwd &&
-							meta.computerId === currentComputerId
-						) {
-							systemPrompt = meta.prompt;
-						} else {
-							systemPrompt = await systemPromptService.construct(conversationId, currentCwd, {
-								...(effectiveModelName !== undefined ? { model: effectiveModelName } : {}),
-								...(workspaceId !== undefined ? { workspaceId } : {}),
-								...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
-							});
-						}
-					}
-				}
-
-				const providerOpts: ProviderStreamOptions = {
-					reasoningEffort: resolvedEffort,
-					...(modelOverride !== undefined ? { model: modelOverride } : {}),
-					...(systemPrompt !== undefined ? { systemPrompt } : {}),
-				};
-
-				// Resolve the steering queue once for this turn. When present, wire
-				// `drainSteering`: the kernel calls it at the tool-result boundary and
-				// appends whatever it returns as user-role messages alongside the tool
-				// results (mid-turn steering). The wrapper emits a `steering` AgentEvent
-				// into the hub (buffered for late-join like `user-message`) so a
-				// frontend can place a user bubble in the transcript live; the kernel
-				// only appends the returned messages — it does NOT emit the event.
-				const queue = deps.resolveQueue?.();
-				const drainSteering =
-					queue === undefined
-						? undefined
-						: (): readonly ChatMessage[] => {
-								const queued = queue.drain(conversationId);
-								if (queued.length === 0) return [];
-								const steerText = queued.map((q) => q.text).join("\n\n");
-								emitToHub(conversationId, {
-									type: "steering",
-									conversationId,
-									turnId,
-									text: steerText,
-								});
-								return [{ role: "user", chunks: [{ type: "text", text: steerText }] }];
-							};
-
-				const opts: RunTurnInput = {
-					provider,
-					messages: [...history, userMsg],
-					tools: assembled.tools,
-					dispatch,
-					emit: emitAndAccumulate,
-					conversationId,
-					turnId,
-					signal: controller.signal,
-					providerOpts,
-					retry: retryStrategy,
-					...(turnLogger !== undefined ? { logger: turnLogger } : {}),
-					...(effectiveCwd !== undefined ? { cwd: effectiveCwd } : {}),
-					...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
-					...(deps.now !== undefined ? { now: deps.now } : {}),
-					...(drainSteering !== undefined ? { drainSteering } : {}),
-				};
-
-				// Persist the user message at turn start so it has a seq
-				// number before the first step generates. This enables the
-				// FE to syncTail during generation (CR-6).
-				await deps.conversationStore.append(conversationId, [userMsg]);
-
-				let stepsPersisted = false;
-				const result = await deps.runTurn({
-					...opts,
-					// Incremental persistence: persist each step's messages
-					// as they are finalized. Seq numbers are assigned during
-					// generation, so the FE can GET /conversations/:id?sinceSeq=N
-					// mid-turn and pick up committed chunks (CR-6).
-					onStepComplete: async (stepMessages) => {
-						await deps.conversationStore.append(conversationId, stepMessages);
-						stepsPersisted = true;
-					},
-				});
-
-				// Fallback: if onStepComplete was never called (e.g., a fake
-				// runTurn in tests), persist all result messages as a batch.
-				if (!stepsPersisted && result.messages.length > 0) {
-					await deps.conversationStore.append(conversationId, result.messages);
-				}
-
-				const turnMetrics = metrics.build(turnId);
-				await deps.conversationStore.appendMetrics(conversationId, turnMetrics);
-
-				emitToHub(conversationId, { type: "turn-sealed", conversationId, turnId });
-				sealed = true;
-			} catch (err) {
-				const message = err instanceof Error ? err.message : String(err);
-				emitToHub(conversationId, {
-					type: "error",
-					conversationId,
-					turnId,
-					message,
-				});
-			} finally {
-				activeTurns.delete(conversationId);
-				// Post-seal carry: if the turn sealed with a non-empty steering queue
-				// (no tool call fired → drainSteering never drained it), start a NEW
-				// detached turn whose opening user-message carries the combined text.
-				// The new turn re-adds to activeTurns + activeConversations, so skip
-				// the activeConversations.delete when carried. May chain (user keeps
-				// steering) — each carried turn's own finally re-checks the queue.
-				const carried = sealed && tryCarryQueue(conversationId);
-				if (!carried) {
-					activeConversations.delete(conversationId);
-				}
-				void payloadPromise.then((payload) => {
-					deps.emit?.(turnSettled, payload);
-					if (!carried) {
-						// Resolve the persisted workspace id before emitting so the
-						// broadcast carries the correct workspace.
-						void deps.conversationStore.getWorkspaceId(conversationId).then((workspaceId) => {
-							deps.emit?.(conversationStatusChanged, {
-								conversationId,
-								status: "idle",
-								workspaceId,
-							});
-						});
-						void deps.conversationStore.setConversationStatus(conversationId, "idle");
-						// Fire-and-forget auto-compaction: check threshold and
-						// compact if exceeded. Non-blocking — the next turn
-						// starts fresh either way.
-						const compaction = deps.resolveCompaction?.();
-						if (compaction !== undefined) {
-							void compaction
-								.compact(conversationId, {
-									auto: true,
-									...(payload.modelName !== undefined ? { modelName: payload.modelName } : {}),
-								})
-								.catch(() => {});
-						}
-					}
-				});
-			}
-		})();
-	}
-
-	const orchestrator: SessionOrchestrator = {
-		startTurn({ conversationId, text, modelName, cwd, computerId, reasoningEffort, workspaceId }) {
-			if (activeTurns.has(conversationId)) {
-				return { started: false, reason: "already-active" };
-			}
-			runTurnDetached(
-				conversationId,
-				text,
-				modelName,
-				cwd,
-				computerId,
-				reasoningEffort,
-				workspaceId ?? "default",
-			);
-			const turn = activeTurns.get(conversationId);
-			const turnId = turn !== undefined ? turn.turnId : "";
-			return { started: true, turnId };
-		},
-
-		enqueue({ conversationId, text, workspaceId, computerId }) {
-			const result = orchestrator.startTurn({
-				conversationId,
-				text,
-				...(workspaceId !== undefined ? { workspaceId } : {}),
-				...(computerId !== undefined ? { computerId } : {}),
-			});
-			if (result.started) {
-				return { startedTurn: true, queue: [] };
-			}
-			// Already active → enqueue onto the steering queue. When the
-			// message-queue extension isn't loaded this degrades: the message is
-			// dropped and the snapshot is empty (feature off).
-			const queue = deps.resolveQueue?.();
-			const snapshot = queue !== undefined ? queue.enqueue(conversationId, text) : [];
-			return { startedTurn: false, queue: snapshot };
-		},
-
-		subscribe(conversationId, listener) {
-			let listeners = subscribers.get(conversationId);
-			if (listeners === undefined) {
-				listeners = new Set();
-				subscribers.set(conversationId, listeners);
-			}
-			const turn = activeTurns.get(conversationId);
-			if (turn !== undefined) {
-				const snapshot = [...turn.buffer];
-				listeners.add(listener);
-				for (const event of snapshot) {
-					listener(event);
-				}
-			} else {
-				listeners.add(listener);
-			}
-			return () => {
-				const set = subscribers.get(conversationId);
-				if (set !== undefined) {
-					set.delete(listener);
-					if (set.size === 0) {
-						subscribers.delete(conversationId);
-					}
-				}
-			};
-		},
-
-		isActive(conversationId) {
-			return activeTurns.has(conversationId);
-		},
-
-		closeConversation(conversationId) {
-			const turn = activeTurns.get(conversationId);
-			const abortedTurn = turn !== undefined;
-			if (turn !== undefined) {
-				turn.controller.abort();
-			}
-			deps.emit?.(conversationClosed, { conversationId });
-			// Resolve the persisted workspace id before emitting so the
-			// broadcast carries the correct workspace. The hook is
-			// fire-and-forget; closeConversation stays synchronous (returns
-			// immediately) while the status-changed emit resolves async.
-			void deps.conversationStore.getWorkspaceId(conversationId).then((workspaceId) => {
-				deps.emit?.(conversationStatusChanged, {
-					conversationId,
-					status: "closed",
-					workspaceId,
-				});
-			});
-			void deps.conversationStore.setConversationStatus(conversationId, "closed");
-			return { abortedTurn };
-		},
-
-		stopTurn(conversationId) {
-			const turn = activeTurns.get(conversationId);
-			const abortedTurn = turn !== undefined;
-			if (turn !== undefined) {
-				turn.controller.abort();
-			}
-			return { abortedTurn };
-		},
-
-		async handleMessage({
-			conversationId,
-			text,
-			onEvent,
-			modelName,
-			cwd,
-			computerId,
-			reasoningEffort,
-			workspaceId,
-		}) {
-			const turnInput: StartTurnInput = {
-				conversationId,
-				text,
-				...(modelName !== undefined ? { modelName } : {}),
-				...(cwd !== undefined ? { cwd } : {}),
-				...(computerId !== undefined ? { computerId } : {}),
-				...(reasoningEffort !== undefined ? { reasoningEffort } : {}),
-				...(workspaceId !== undefined ? { workspaceId } : {}),
-			};
-			const result = orchestrator.startTurn(turnInput);
-			if (!result.started) {
-				const errorTurnId = generateTurnId();
-				onEvent({
-					type: "error",
-					conversationId,
-					turnId: errorTurnId,
-					message: "turn already active for this conversation",
-				});
-				return;
-			}
-
-			await new Promise<void>((resolve) => {
-				const unsubscribe = orchestrator.subscribe(conversationId, (event) => {
-					onEvent(event);
-					if (event.type === "turn-sealed" || event.type === "error") {
-						unsubscribe();
-						resolve();
-					}
-				});
-			});
-		},
-	};
-
-	return { orchestrator, activeConversations };
+  const activeConversations = new Set<string>();
+  const subscribers = new Map<string, Set<TurnEventListener>>();
+  const activeTurns = new Map<string, ActiveTurn>();
+  // One stateless retry strategy shared by every turn (delayFor is pure; sleep
+  // is a stateless setTimeout closure). Wired into each RunTurnInput.retry.
+  const retryStrategy = createRetryStrategy();
+
+  function emitToHub(conversationId: string, event: AgentEvent): void {
+    const turn = activeTurns.get(conversationId);
+    if (turn !== undefined) {
+      turn.buffer.push(event);
+    }
+    const listeners = subscribers.get(conversationId);
+    if (listeners !== undefined) {
+      for (const listener of listeners) {
+        listener(event);
+      }
+    }
+  }
+
+  /**
+   * Post-seal carry: if a steering queue is available and non-empty, drain it,
+   * combine, and start a NEW detached turn whose opening `user-message` carries
+   * the combined text (no `steering` event — that's only for mid-turn drain).
+   * Returns true iff a new turn was started. Called from `runTurnDetached`'s
+   * finally AFTER `activeTurns.delete` (so the new turn's single-flight guard
+   * passes) and BEFORE `activeConversations.delete` (skipped when carried, since
+   * the new turn re-adds it). May chain — the new turn's own finally re-checks.
+   */
+  function tryCarryQueue(conversationId: string): boolean {
+    const queue = deps.resolveQueue?.();
+    if (queue === undefined) return false;
+    if (queue.getQueue(conversationId).length === 0) return false;
+    const drained = queue.drain(conversationId);
+    const combined = drained.map((q) => q.text).join("\n\n");
+    const result = orchestrator.startTurn({ conversationId, text: combined });
+    return result.started;
+  }
+
+  function runTurnDetached(
+    conversationId: string,
+    text: string,
+    modelName: string | undefined,
+    cwd: string | undefined,
+    computerId: string | undefined,
+    reasoningEffortOverride: ReasoningEffort | undefined,
+    workspaceId: string,
+  ): void {
+    const turnId = generateTurnId();
+    const controller = new AbortController();
+    activeTurns.set(conversationId, { buffer: [], turnId, controller });
+    activeConversations.add(conversationId);
+
+    emitToHub(conversationId, { type: "user-message", conversationId, turnId, text });
+
+    // For a NEW conversation the workspace MUST be assigned (persisted)
+    // BEFORE getEffectiveCwd runs, so the effective cwd resolves against
+    // the intended workspace's defaultCwd rather than the stale "default"
+    // workspace returned by getWorkspaceId for a not-yet-persisted
+    // conversation. Detect newness via getConversationMeta === null
+    // (equivalent to history.length === 0 in practice). Existing
+    // conversations keep their assigned workspace — never overwritten.
+    // The newness flag is also reused to decide whether to construct
+    // (first turn) or get (subsequent turn) the system prompt — see the
+    // providerOpts assembly below.
+    const workspaceSetupPromise = (async (): Promise<boolean> => {
+      const meta = await deps.conversationStore.getConversationMeta(conversationId);
+      if (meta === null) {
+        await deps.conversationStore.ensureWorkspace(workspaceId);
+        await deps.conversationStore.setWorkspaceId(conversationId, workspaceId);
+        return true;
+      }
+      return false;
+    })();
+
+    // ALWAYS resolve the effective cwd through getEffectiveCwd, passing the
+    // per-turn cwd as the overrideCwd when present. A relative per-turn cwd
+    // (e.g. "arch-rewrite") must be resolved against the workspace's
+    // defaultCwd via the same workspace-relative algorithm the persisted cwd
+    // uses — NOT used raw (which would resolve against process.cwd() and
+    // break). When cwd is undefined, getEffectiveCwd reads the persisted cwd.
+    // Chained after workspaceSetupPromise so the workspace is assigned
+    // first for new conversations (the timing invariant this enforces).
+    const effectiveCwdPromise = workspaceSetupPromise.then(() =>
+      deps.conversationStore.getEffectiveCwd(conversationId, cwd).then((c) => c ?? undefined),
+    );
+
+    // Resolve the effective computer the SAME way cwd resolves — pass the
+    // per-turn computerId as the overrideAlias. When computerId is
+    // undefined, getEffectiveComputer reads the persisted per-conversation
+    // computerId → workspace defaultComputerId → null (LOCAL). Chained
+    // after workspaceSetupPromise (same timing invariant as cwd). The
+    // orchestrator never interprets the alias — it forwards the string
+    // verbatim (like cwd forwards a path). Mirrors effectiveCwdPromise.
+    const effectiveComputerIdPromise = workspaceSetupPromise.then(() =>
+      deps.conversationStore
+        .getEffectiveComputer(conversationId, computerId)
+        .then((c) => c ?? undefined),
+    );
+
+    const storedEffortPromise = deps.conversationStore.getReasoningEffort(conversationId);
+    // Resolve the persisted model (if any) in parallel with the other
+    // per-conversation reads. The effective model name is
+    // per-turn override → persisted → (undefined → default provider), the
+    // same resolution chain as `resolveReasoningEffort`.
+    const storedModelPromise = deps.conversationStore.getModel(conversationId);
+
+    const payloadPromise = Promise.all([
+      effectiveCwdPromise,
+      effectiveComputerIdPromise,
+      storedEffortPromise,
+      storedModelPromise,
+    ]).then(([effectiveCwd, effectiveComputerId, _storedEffort, storedModel]) => {
+      const effectiveModelName = resolveModelName(modelName, storedModel);
+      return {
+        conversationId,
+        ...(effectiveCwd !== undefined ? { cwd: effectiveCwd } : {}),
+        ...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
+        ...(effectiveModelName !== undefined ? { modelName: effectiveModelName } : {}),
+      };
+    });
+
+    payloadPromise.then((payload) => {
+      deps.emit?.(turnStarted, payload);
+      // Resolve the persisted workspace id (not the per-turn start option)
+      // before emitting so the broadcast carries the correct workspace.
+      void deps.conversationStore.getWorkspaceId(conversationId).then((workspaceId) => {
+        deps.emit?.(conversationStatusChanged, {
+          conversationId,
+          status: "active",
+          workspaceId,
+        });
+      });
+      void deps.conversationStore.setConversationStatus(conversationId, "active");
+    });
+
+    void (async () => {
+      let sealed = false;
+      try {
+        const [effectiveCwd, effectiveComputerId, storedEffort, isNewConversation, storedModel] =
+          await Promise.all([
+            effectiveCwdPromise,
+            effectiveComputerIdPromise,
+            storedEffortPromise,
+            workspaceSetupPromise,
+            storedModelPromise,
+          ]);
+
+        if (cwd !== undefined) {
+          await deps.conversationStore.setCwd(conversationId, cwd);
+        }
+
+        // Persist the per-turn computer override, mirroring the cwd
+        // persistence above. Only stamped when a computerId was actually
+        // provided — NOT when it resolved to undefined (LOCAL) via the
+        // workspace default. Idempotent when the value is unchanged.
+        if (computerId !== undefined) {
+          await deps.conversationStore.setComputerId(conversationId, computerId);
+        }
+
+        const resolvedEffort = resolveReasoningEffort(reasoningEffortOverride, storedEffort);
+        // Effective model name: per-turn override → persisted → undefined
+        // (→ default provider). Resolved here so every downstream consumer
+        // (resolveModel, system prompt, payload) sees the same model as if
+        // the caller had passed it explicitly.
+        const effectiveModelName = resolveModelName(modelName, storedModel);
+
+        const history = await deps.conversationStore.load(conversationId);
+        const userMsg = buildUserMessage(text);
+
+        // Workspace assignment for new conversations happens BEFORE
+        // effective-cwd resolution (see workspaceSetupPromise above) so
+        // getEffectiveCwd resolves against the intended workspace, not
+        // the stale "default". The history-load + append flow below is
+        // otherwise unchanged.
+
+        let provider: ProviderContract;
+        let modelOverride: string | undefined;
+
+        if (effectiveModelName !== undefined && deps.resolveModel !== undefined) {
+          const resolved = deps.resolveModel(effectiveModelName);
+          if (resolved === undefined) {
+            emitToHub(conversationId, {
+              type: "error",
+              conversationId,
+              turnId,
+              message: `unknown model: ${effectiveModelName}`,
+            });
+            return;
+          }
+          provider = resolved.provider;
+          modelOverride = resolved.model;
+          // Persist the resolved model so it sticks for future turns
+          // and browser sessions (per-conversation model persistence).
+          // Only stamped when a model was actually used — NOT on the
+          // default-provider fallthrough (nothing to persist). Idempotent
+          // when the value is unchanged (re-stamps the same persisted
+          // model). The early `return` above means an unknown model is
+          // never persisted.
+          await deps.conversationStore.setModel(conversationId, effectiveModelName);
+        } else {
+          provider = deps.resolveProvider();
+        }
+
+        const baseTools = deps.resolveTools();
+        const assembled = await deps.applyToolsFilter({
+          tools: baseTools,
+          conversationId,
+          ...(effectiveCwd !== undefined ? { cwd: effectiveCwd } : {}),
+          ...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
+        });
+        const dispatch = deps.resolveDispatch?.() ?? defaultDispatchPolicy();
+        const turnLogger = deps.logger?.child({ conversationId, turnId });
+        const metrics = createMetricsAccumulator();
+
+        const emitAndAccumulate = (event: AgentEvent): void => {
+          metrics.ingest(event);
+          emitToHub(conversationId, event);
+        };
+
+        // Resolve the system prompt for this turn (cache-safe). On the
+        // FIRST turn of a new conversation, construct it once (resolves all
+        // template variables + persists the result). On subsequent turns,
+        // reuse the persisted prompt via `getWithMeta` — but ONLY when the
+        // stored cwd matches the current effective cwd. If the cwd changed
+        // since the prompt was constructed (or no prompt was ever stored),
+        // reconstruct against the new cwd so the prompt is never stale.
+        // This preserves the cache-safe design (construct once per cwd,
+        // reuse on subsequent turns with the same cwd) while fixing the bug
+        // where a cwd change left the prompt stale. When the system-prompt
+        // service isn't loaded, no system prompt is sent (current behavior
+        // preserved).
+        const systemPromptService = deps.resolveSystemPrompt?.();
+        let systemPrompt: string | undefined;
+        if (systemPromptService !== undefined) {
+          if (isNewConversation) {
+            systemPrompt = await systemPromptService.construct(
+              conversationId,
+              effectiveCwd ?? process.cwd(),
+              {
+                ...(effectiveModelName !== undefined ? { model: effectiveModelName } : {}),
+                ...(workspaceId !== undefined ? { workspaceId } : {}),
+                ...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
+              },
+            );
+          } else {
+            const meta = await systemPromptService.getWithMeta(conversationId);
+            const currentCwd = effectiveCwd ?? process.cwd();
+            const currentComputerId = effectiveComputerId ?? null;
+            // Invalidate when cwd OR computerId changed (switching computers
+            // must rebuild the prompt against the remote OS/hostname).
+            if (
+              meta.prompt !== null &&
+              meta.cwd === currentCwd &&
+              meta.computerId === currentComputerId
+            ) {
+              systemPrompt = meta.prompt;
+            } else {
+              systemPrompt = await systemPromptService.construct(conversationId, currentCwd, {
+                ...(effectiveModelName !== undefined ? { model: effectiveModelName } : {}),
+                ...(workspaceId !== undefined ? { workspaceId } : {}),
+                ...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
+              });
+            }
+          }
+        }
+
+        const providerOpts: ProviderStreamOptions = {
+          reasoningEffort: resolvedEffort,
+          ...(modelOverride !== undefined ? { model: modelOverride } : {}),
+          ...(systemPrompt !== undefined ? { systemPrompt } : {}),
+        };
+
+        // Resolve the steering queue once for this turn. When present, wire
+        // `drainSteering`: the kernel calls it at the tool-result boundary and
+        // appends whatever it returns as user-role messages alongside the tool
+        // results (mid-turn steering). The wrapper emits a `steering` AgentEvent
+        // into the hub (buffered for late-join like `user-message`) so a
+        // frontend can place a user bubble in the transcript live; the kernel
+        // only appends the returned messages — it does NOT emit the event.
+        const queue = deps.resolveQueue?.();
+        const drainSteering =
+          queue === undefined
+            ? undefined
+            : (): readonly ChatMessage[] => {
+                const queued = queue.drain(conversationId);
+                if (queued.length === 0) return [];
+                const steerText = queued.map((q) => q.text).join("\n\n");
+                emitToHub(conversationId, {
+                  type: "steering",
+                  conversationId,
+                  turnId,
+                  text: steerText,
+                });
+                return [{ role: "user", chunks: [{ type: "text", text: steerText }] }];
+              };
+
+        const opts: RunTurnInput = {
+          provider,
+          messages: [...history, userMsg],
+          tools: assembled.tools,
+          dispatch,
+          emit: emitAndAccumulate,
+          conversationId,
+          turnId,
+          signal: controller.signal,
+          providerOpts,
+          retry: retryStrategy,
+          ...(turnLogger !== undefined ? { logger: turnLogger } : {}),
+          ...(effectiveCwd !== undefined ? { cwd: effectiveCwd } : {}),
+          ...(effectiveComputerId !== undefined ? { computerId: effectiveComputerId } : {}),
+          ...(deps.now !== undefined ? { now: deps.now } : {}),
+          ...(drainSteering !== undefined ? { drainSteering } : {}),
+        };
+
+        // Persist the user message at turn start so it has a seq
+        // number before the first step generates. This enables the
+        // FE to syncTail during generation (CR-6).
+        await deps.conversationStore.append(conversationId, [userMsg]);
+
+        let stepsPersisted = false;
+        const result = await deps.runTurn({
+          ...opts,
+          // Incremental persistence: persist each step's messages
+          // as they are finalized. Seq numbers are assigned during
+          // generation, so the FE can GET /conversations/:id?sinceSeq=N
+          // mid-turn and pick up committed chunks (CR-6).
+          onStepComplete: async (stepMessages) => {
+            await deps.conversationStore.append(conversationId, stepMessages);
+            stepsPersisted = true;
+          },
+        });
+
+        // Fallback: if onStepComplete was never called (e.g., a fake
+        // runTurn in tests), persist all result messages as a batch.
+        if (!stepsPersisted && result.messages.length > 0) {
+          await deps.conversationStore.append(conversationId, result.messages);
+        }
+
+        const turnMetrics = metrics.build(turnId);
+        await deps.conversationStore.appendMetrics(conversationId, turnMetrics);
+
+        emitToHub(conversationId, { type: "turn-sealed", conversationId, turnId });
+        sealed = true;
+      } catch (err) {
+        const message = err instanceof Error ? err.message : String(err);
+        emitToHub(conversationId, {
+          type: "error",
+          conversationId,
+          turnId,
+          message,
+        });
+      } finally {
+        activeTurns.delete(conversationId);
+        // Post-seal carry: if the turn sealed with a non-empty steering queue
+        // (no tool call fired → drainSteering never drained it), start a NEW
+        // detached turn whose opening user-message carries the combined text.
+        // The new turn re-adds to activeTurns + activeConversations, so skip
+        // the activeConversations.delete when carried. May chain (user keeps
+        // steering) — each carried turn's own finally re-checks the queue.
+        const carried = sealed && tryCarryQueue(conversationId);
+        if (!carried) {
+          activeConversations.delete(conversationId);
+        }
+        void payloadPromise.then((payload) => {
+          deps.emit?.(turnSettled, payload);
+          if (!carried) {
+            // Resolve the persisted workspace id before emitting so the
+            // broadcast carries the correct workspace.
+            void deps.conversationStore.getWorkspaceId(conversationId).then((workspaceId) => {
+              deps.emit?.(conversationStatusChanged, {
+                conversationId,
+                status: "idle",
+                workspaceId,
+              });
+            });
+            void deps.conversationStore.setConversationStatus(conversationId, "idle");
+            // Fire-and-forget auto-compaction: check threshold and
+            // compact if exceeded. Non-blocking — the next turn
+            // starts fresh either way.
+            const compaction = deps.resolveCompaction?.();
+            if (compaction !== undefined) {
+              void compaction
+                .compact(conversationId, {
+                  auto: true,
+                  ...(payload.modelName !== undefined ? { modelName: payload.modelName } : {}),
+                })
+                .catch(() => {});
+            }
+          }
+        });
+      }
+    })();
+  }
+
+  const orchestrator: SessionOrchestrator = {
+    startTurn({ conversationId, text, modelName, cwd, computerId, reasoningEffort, workspaceId }) {
+      if (activeTurns.has(conversationId)) {
+        return { started: false, reason: "already-active" };
+      }
+      runTurnDetached(
+        conversationId,
+        text,
+        modelName,
+        cwd,
+        computerId,
+        reasoningEffort,
+        workspaceId ?? "default",
+      );
+      const turn = activeTurns.get(conversationId);
+      const turnId = turn !== undefined ? turn.turnId : "";
+      return { started: true, turnId };
+    },
+
+    enqueue({ conversationId, text, workspaceId, computerId }) {
+      const result = orchestrator.startTurn({
+        conversationId,
+        text,
+        ...(workspaceId !== undefined ? { workspaceId } : {}),
+        ...(computerId !== undefined ? { computerId } : {}),
+      });
+      if (result.started) {
+        return { startedTurn: true, queue: [] };
+      }
+      // Already active → enqueue onto the steering queue. When the
+      // message-queue extension isn't loaded this degrades: the message is
+      // dropped and the snapshot is empty (feature off).
+      const queue = deps.resolveQueue?.();
+      const snapshot = queue !== undefined ? queue.enqueue(conversationId, text) : [];
+      return { startedTurn: false, queue: snapshot };
+    },
+
+    subscribe(conversationId, listener) {
+      let listeners = subscribers.get(conversationId);
+      if (listeners === undefined) {
+        listeners = new Set();
+        subscribers.set(conversationId, listeners);
+      }
+      const turn = activeTurns.get(conversationId);
+      if (turn !== undefined) {
+        const snapshot = [...turn.buffer];
+        listeners.add(listener);
+        for (const event of snapshot) {
+          listener(event);
+        }
+      } else {
+        listeners.add(listener);
+      }
+      return () => {
+        const set = subscribers.get(conversationId);
+        if (set !== undefined) {
+          set.delete(listener);
+          if (set.size === 0) {
+            subscribers.delete(conversationId);
+          }
+        }
+      };
+    },
+
+    isActive(conversationId) {
+      return activeTurns.has(conversationId);
+    },
+
+    closeConversation(conversationId) {
+      const turn = activeTurns.get(conversationId);
+      const abortedTurn = turn !== undefined;
+      if (turn !== undefined) {
+        turn.controller.abort();
+      }
+      deps.emit?.(conversationClosed, { conversationId });
+      // Resolve the persisted workspace id before emitting so the
+      // broadcast carries the correct workspace. The hook is
+      // fire-and-forget; closeConversation stays synchronous (returns
+      // immediately) while the status-changed emit resolves async.
+      void deps.conversationStore.getWorkspaceId(conversationId).then((workspaceId) => {
+        deps.emit?.(conversationStatusChanged, {
+          conversationId,
+          status: "closed",
+          workspaceId,
+        });
+      });
+      void deps.conversationStore.setConversationStatus(conversationId, "closed");
+      return { abortedTurn };
+    },
+
+    stopTurn(conversationId) {
+      const turn = activeTurns.get(conversationId);
+      const abortedTurn = turn !== undefined;
+      if (turn !== undefined) {
+        turn.controller.abort();
+      }
+      return { abortedTurn };
+    },
+
+    async handleMessage({
+      conversationId,
+      text,
+      onEvent,
+      modelName,
+      cwd,
+      computerId,
+      reasoningEffort,
+      workspaceId,
+    }) {
+      const turnInput: StartTurnInput = {
+        conversationId,
+        text,
+        ...(modelName !== undefined ? { modelName } : {}),
+        ...(cwd !== undefined ? { cwd } : {}),
+        ...(computerId !== undefined ? { computerId } : {}),
+        ...(reasoningEffort !== undefined ? { reasoningEffort } : {}),
+        ...(workspaceId !== undefined ? { workspaceId } : {}),
+      };
+      const result = orchestrator.startTurn(turnInput);
+      if (!result.started) {
+        const errorTurnId = generateTurnId();
+        onEvent({
+          type: "error",
+          conversationId,
+          turnId: errorTurnId,
+          message: "turn already active for this conversation",
+        });
+        return;
+      }
+
+      await new Promise<void>((resolve) => {
+        const unsubscribe = orchestrator.subscribe(conversationId, (event) => {
+          onEvent(event);
+          if (event.type === "turn-sealed" || event.type === "error") {
+            unsubscribe();
+            resolve();
+          }
+        });
+      });
+    },
+  };
+
+  return { orchestrator, activeConversations };
 }
 
 export function createWarmService(
-	deps: WarmServiceDeps,
-	activeConversations: ReadonlySet<string>,
+  deps: WarmServiceDeps,
+  activeConversations: ReadonlySet<string>,
 ): WarmService {
-	return {
-		async warm(conversationId, opts) {
-			if (activeConversations.has(conversationId)) {
-				return { error: "conversation is generating" };
-			}
-
-			const history = await deps.conversationStore.load(conversationId);
-			if (history.length === 0) {
-				return { error: "no history" };
-			}
-
-			let provider: ProviderContract;
-			let modelOverride: string | undefined;
-
-			// Resolve the model the SAME way the real turn does: per-turn override
-			// → persisted per-conversation model → default provider. A mismatch here
-			// silently busts the prompt cache (the model block of the prompt prefix
-			// diverges from the real turn's). Warm is a probe — it does NOT persist
-			// (no setModel), it only reads so it sends the same model the next real
-			// turn will. See notes/observability-design.md §3.1.
-			const storedModel = await deps.conversationStore.getModel(conversationId);
-			const effectiveModelName = resolveModelName(opts?.modelName, storedModel);
-
-			if (effectiveModelName !== undefined && deps.resolveModel !== undefined) {
-				const resolved = deps.resolveModel(effectiveModelName);
-				if (resolved === undefined) {
-					return { error: `unknown model: ${effectiveModelName}` };
-				}
-				provider = resolved.provider;
-				modelOverride = resolved.model;
-			} else {
-				provider = deps.resolveProvider();
-			}
-
-			const baseTools = deps.resolveTools();
-			// Resolve cwd the SAME way handleMessage does — pass opts.cwd as the overrideCwd
-			// The tools filter is cwd-sensitive (e.g. skill discovery rewrites the
-			// `load_skill` description per-cwd). If the warm assembles tools under a
-			// different cwd than the real turn, the tools block — the FIRST bytes of
-			// the prompt-cache prefix — diverges and the cache misses entirely (0%).
-			// A manual reheat sends no cwd, so without this fallback it would warm the
-			// wrong prefix. See notes/observability-design.md §3.1.
-			const cwd =
-				(await deps.conversationStore.getEffectiveCwd(conversationId, opts?.cwd)) ?? undefined;
-			const assembled = await deps.applyToolsFilter({
-				tools: baseTools,
-				conversationId,
-				...(cwd !== undefined ? { cwd } : {}),
-			});
-
-			// Resolve reasoning effort the SAME way the real turn does (stored → "high";
-			// no per-turn override on warm). A mismatch here silently busts the prompt cache.
-			const storedEffort = await deps.conversationStore.getReasoningEffort(conversationId);
-			const resolvedEffort = resolveReasoningEffort(undefined, storedEffort);
-
-			const probeMsg: ChatMessage = {
-				role: "user",
-				chunks: [{ type: "text", text: "reply with just a ." }],
-			};
-			const messages = [...history, probeMsg];
-
-			// Capture the warm send as a `provider.request` span, flagged `warm: true`
-			// so it can be diffed against the corresponding real turn's request (the
-			// prompt-cache 0%-hit debugging workflow — see notes/observability-design.md
-			// §3.1). Without this the warm body is invisible and the cache bust is
-			// undebuggable. The child-bound `warm` attribute flows into the span the
-			// provider opens (kernel logger merges child attrs into span attributes).
-			const warmLogger = deps.logger?.child({ conversationId, attrs: { warm: true } });
-			const providerOpts: ProviderStreamOptions = {
-				maxTokens: 1,
-				reasoningEffort: resolvedEffort,
-				...(modelOverride !== undefined ? { model: modelOverride } : {}),
-				...(warmLogger !== undefined ? { logger: warmLogger } : {}),
-			};
-
-			let inputTokens = 0;
-			let outputTokens = 0;
-			let cacheReadTokens = 0;
-			let cacheWriteTokens = 0;
-
-			for await (const event of provider.stream(messages, assembled.tools, providerOpts)) {
-				if ((event as ProviderEvent).type === "usage") {
-					const usageEvent = event as UsageEvent;
-					inputTokens = usageEvent.usage.inputTokens;
-					outputTokens = usageEvent.usage.outputTokens;
-					cacheReadTokens = usageEvent.usage.cacheReadTokens ?? 0;
-					cacheWriteTokens = usageEvent.usage.cacheWriteTokens ?? 0;
-				}
-			}
-
-			const result: WarmResult = { inputTokens, outputTokens, cacheReadTokens, cacheWriteTokens };
-			deps.emit(warmCompleted, { conversationId, usage: result });
-			return result;
-		},
-	};
+  return {
+    async warm(conversationId, opts) {
+      if (activeConversations.has(conversationId)) {
+        return { error: "conversation is generating" };
+      }
+
+      const history = await deps.conversationStore.load(conversationId);
+      if (history.length === 0) {
+        return { error: "no history" };
+      }
+
+      let provider: ProviderContract;
+      let modelOverride: string | undefined;
+
+      // Resolve the model the SAME way the real turn does: per-turn override
+      // → persisted per-conversation model → default provider. A mismatch here
+      // silently busts the prompt cache (the model block of the prompt prefix
+      // diverges from the real turn's). Warm is a probe — it does NOT persist
+      // (no setModel), it only reads so it sends the same model the next real
+      // turn will. See notes/observability-design.md §3.1.
+      const storedModel = await deps.conversationStore.getModel(conversationId);
+      const effectiveModelName = resolveModelName(opts?.modelName, storedModel);
+
+      if (effectiveModelName !== undefined && deps.resolveModel !== undefined) {
+        const resolved = deps.resolveModel(effectiveModelName);
+        if (resolved === undefined) {
+          return { error: `unknown model: ${effectiveModelName}` };
+        }
+        provider = resolved.provider;
+        modelOverride = resolved.model;
+      } else {
+        provider = deps.resolveProvider();
+      }
+
+      const baseTools = deps.resolveTools();
+      // Resolve cwd the SAME way handleMessage does — pass opts.cwd as the overrideCwd
+      // The tools filter is cwd-sensitive (e.g. skill discovery rewrites the
+      // `load_skill` description per-cwd). If the warm assembles tools under a
+      // different cwd than the real turn, the tools block — the FIRST bytes of
+      // the prompt-cache prefix — diverges and the cache misses entirely (0%).
+      // A manual reheat sends no cwd, so without this fallback it would warm the
+      // wrong prefix. See notes/observability-design.md §3.1.
+      const cwd =
+        (await deps.conversationStore.getEffectiveCwd(conversationId, opts?.cwd)) ?? undefined;
+      const assembled = await deps.applyToolsFilter({
+        tools: baseTools,
+        conversationId,
+        ...(cwd !== undefined ? { cwd } : {}),
+      });
+
+      // Resolve reasoning effort the SAME way the real turn does (stored → "high";
+      // no per-turn override on warm). A mismatch here silently busts the prompt cache.
+      const storedEffort = await deps.conversationStore.getReasoningEffort(conversationId);
+      const resolvedEffort = resolveReasoningEffort(undefined, storedEffort);
+
+      const probeMsg: ChatMessage = {
+        role: "user",
+        chunks: [{ type: "text", text: "reply with just a ." }],
+      };
+      const messages = [...history, probeMsg];
+
+      // Capture the warm send as a `provider.request` span, flagged `warm: true`
+      // so it can be diffed against the corresponding real turn's request (the
+      // prompt-cache 0%-hit debugging workflow — see notes/observability-design.md
+      // §3.1). Without this the warm body is invisible and the cache bust is
+      // undebuggable. The child-bound `warm` attribute flows into the span the
+      // provider opens (kernel logger merges child attrs into span attributes).
+      const warmLogger = deps.logger?.child({ conversationId, attrs: { warm: true } });
+      const providerOpts: ProviderStreamOptions = {
+        maxTokens: 1,
+        reasoningEffort: resolvedEffort,
+        ...(modelOverride !== undefined ? { model: modelOverride } : {}),
+        ...(warmLogger !== undefined ? { logger: warmLogger } : {}),
+      };
+
+      let inputTokens = 0;
+      let outputTokens = 0;
+      let cacheReadTokens = 0;
+      let cacheWriteTokens = 0;
+
+      for await (const event of provider.stream(messages, assembled.tools, providerOpts)) {
+        if ((event as ProviderEvent).type === "usage") {
+          const usageEvent = event as UsageEvent;
+          inputTokens = usageEvent.usage.inputTokens;
+          outputTokens = usageEvent.usage.outputTokens;
+          cacheReadTokens = usageEvent.usage.cacheReadTokens ?? 0;
+          cacheWriteTokens = usageEvent.usage.cacheWriteTokens ?? 0;
+        }
+      }
+
+      const result: WarmResult = { inputTokens, outputTokens, cacheReadTokens, cacheWriteTokens };
+      deps.emit(warmCompleted, { conversationId, usage: result });
+      return result;
+    },
+  };
 }
 
 const DEFAULT_KEEP_LAST_N = 10;
 const DEFAULT_COMPACT_PERCENT = 85;
 
 const COMPACTION_SYSTEM_PROMPT =
-	"You are a conversation summarizer. Summarize the following conversation concord concisely but comprehensively. " +
-	"Focus on key decisions, context, file paths, and any unresolved questions. " +
-	"The summary must preserve enough detail for the conversation to continue with full context.";
+  "You are a conversation summarizer. Summarize the following conversation concord concisely but comprehensively. " +
+  "Focus on key decisions, context, file paths, and any unresolved questions. " +
+  "The summary must preserve enough detail for the conversation to continue with full context.";
 
 function formatMessagesForSummary(messages: readonly ChatMessage[]): string {
-	return messages
-		.map((msg) => {
-			const text = msg.chunks
-				.map((c) => {
-					if (c.type === "text") return c.text;
-					if (c.type === "tool-call") return `[tool: ${c.toolName}]`;
-					if (c.type === "tool-result") return `[tool result: ${c.content.slice(0, 200)}]`;
-					return "";
-				})
-				.join("");
-			return `${msg.role}: ${text}`;
-		})
-		.join("\n\n");
+  return messages
+    .map((msg) => {
+      const text = msg.chunks
+        .map((c) => {
+          if (c.type === "text") return c.text;
+          if (c.type === "tool-call") return `[tool: ${c.toolName}]`;
+          if (c.type === "tool-result") return `[tool result: ${c.content.slice(0, 200)}]`;
+          return "";
+        })
+        .join("");
+      return `${msg.role}: ${text}`;
+    })
+    .join("\n\n");
 }
 
 export function createCompactionService(
-	deps: SessionOrchestratorDeps & {
-		readonly emit: <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload) => void;
-	},
-	activeConversations: ReadonlySet<string>,
+  deps: SessionOrchestratorDeps & {
+    readonly emit: <TPayload>(hook: EventHookDescriptor<TPayload>, payload: TPayload) => void;
+  },
+  activeConversations: ReadonlySet<string>,
 ): CompactionService {
-	return {
-		async compact(conversationId, opts) {
-			if (activeConversations.has(conversationId)) {
-				return { error: "conversation is generating" };
-			}
-
-			const history = await deps.conversationStore.load(conversationId);
-			const keepLastN = opts?.keepLastN ?? DEFAULT_KEEP_LAST_N;
-
-			if (history.length <= keepLastN) {
-				return { error: "conversation too short to compact" };
-			}
-
-			// Auto mode: check if contextSize exceeds percent of contextWindow.
-			if (opts?.auto === true) {
-				const stored = await deps.conversationStore.getCompactPercent(conversationId);
-				const percent = stored ?? DEFAULT_COMPACT_PERCENT;
-				if (percent <= 0) return { error: "auto-compact disabled" };
-				const metrics = await deps.conversationStore.loadMetrics(conversationId);
-				const lastTurn = metrics[metrics.length - 1];
-				if (lastTurn === undefined) return { error: "no metrics" };
-				const contextSize = lastTurn.contextSize;
-				if (contextSize === undefined) return { error: "no context size" };
-
-				// Resolve the model's context window.
-				const modelName = opts.modelName;
-				if (modelName === undefined || deps.resolveModelInfo === undefined) {
-					return { error: "cannot resolve model info" };
-				}
-				const info = await deps.resolveModelInfo(modelName);
-				if (info?.contextWindow === undefined) {
-					return { error: "model context window unknown" };
-				}
-				const threshold = Math.floor(info.contextWindow * (percent / 100));
-				if (contextSize < threshold) return { error: "threshold not exceeded" };
-			}
-
-			// Split: old messages to summarize + recent messages to keep.
-			const toSummarize = history.slice(0, history.length - keepLastN);
-			const toKeep = history.slice(history.length - keepLastN);
-
-			// Resolve provider
-			let provider: ProviderContract;
-			let modelOverride: string | undefined;
-			if (opts?.modelName !== undefined && deps.resolveModel !== undefined) {
-				const resolved = deps.resolveModel(opts.modelName);
-				if (resolved === undefined) return { error: `unknown model: ${opts.modelName}` };
-				provider = resolved.provider;
-				modelOverride = resolved.model;
-			} else {
-				provider = deps.resolveProvider();
-			}
-
-			// Build the summarization request: system prompt + conversation text + instruction
-			const conversationText = formatMessagesForSummary(toSummarize);
-			const summaryRequest: ChatMessage = {
-				role: "user",
-				chunks: [
-					{
-						type: "text",
-						text: `Please summarize the following conversation:\n\n${conversationText}`,
-					},
-				],
-			};
-
-			const providerOpts: ProviderStreamOptions = {
-				maxTokens: 2000,
-				...(modelOverride !== undefined ? { model: modelOverride } : {}),
-				...(deps.logger !== undefined
-					? { logger: deps.logger.child({ conversationId, attrs: { compaction: true } }) }
-					: {}),
-			};
-
-			// Reconstruct the system prompt on compaction (fresh variable
-			// resolution — files/cwd/time may have changed since construction).
-			// The construct call also persists the result for future turns. When
-			// the system-prompt service is unavailable, fall back to the
-			// compaction-only system prompt (current behavior, no regression).
-			const systemPromptService = deps.resolveSystemPrompt?.();
-			let compactionSystemPrompt: string;
-			if (systemPromptService !== undefined) {
-				const cwd = (await deps.conversationStore.getEffectiveCwd(conversationId)) ?? process.cwd();
-				const workspaceId = await deps.conversationStore.getWorkspaceId(conversationId);
-				const computerId = await deps.conversationStore.getEffectiveComputer(conversationId);
-				const constructed = await systemPromptService.construct(conversationId, cwd, {
-					...(opts?.modelName !== undefined ? { model: opts.modelName } : {}),
-					workspaceId,
-					...(computerId !== null ? { computerId } : {}),
-				});
-				compactionSystemPrompt = `${constructed}\n\n${COMPACTION_SYSTEM_PROMPT}`;
-			} else {
-				compactionSystemPrompt = COMPACTION_SYSTEM_PROMPT;
-			}
-
-			// Call the provider and accumulate the summary
-			let summary = "";
-			for await (const event of provider.stream([summaryRequest], [], {
-				...providerOpts,
-				systemPrompt: compactionSystemPrompt,
-			})) {
-				if ((event as ProviderEvent).type === "text-delta") {
-					summary += (event as { delta: string }).delta;
-				} else if ((event as ProviderEvent).type === "error") {
-					return { error: (event as { message: string }).message };
-				}
-			}
-
-			if (summary.trim().length === 0) {
-				return { error: "model produced empty summary" };
-			}
-
-			// Non-destructive: fork the full pre-compaction history to a new
-			// archive conversation. The original conversation keeps its ID
-			// (so messaging between agents still works) and gets the compacted
-			// content. The archive inherits the original's compactedFrom,
-			// creating a chain: A → Y → X → ...
-			const archiveId = crypto.randomUUID();
-			await deps.conversationStore.forkHistory(conversationId, archiveId);
-
-			// Replace history: [system: summary] + recent messages
-			const summaryMessage: ChatMessage = {
-				role: "system",
-				chunks: [
-					{
-						type: "text",
-						text: `The following is a summary of the previous conversation:\n\n${summary}`,
-					},
-				],
-			};
-
-			await deps.conversationStore.replaceHistory(conversationId, [summaryMessage, ...toKeep]);
-			await deps.conversationStore.setCompactedFrom(conversationId, archiveId);
-
-			const result: CompactionResult = {
-				summary,
-				newConversationId: archiveId,
-				messagesSummarized: toSummarize.length,
-				messagesKept: toKeep.length,
-			};
-
-			deps.emit(conversationCompacted, {
-				conversationId,
-				newConversationId: archiveId,
-				messagesSummarized: toSummarize.length,
-				messagesKept: toKeep.length,
-			});
-
-			return result;
-		},
-	};
+  return {
+    async compact(conversationId, opts) {
+      if (activeConversations.has(conversationId)) {
+        return { error: "conversation is generating" };
+      }
+
+      const history = await deps.conversationStore.load(conversationId);
+      const keepLastN = opts?.keepLastN ?? DEFAULT_KEEP_LAST_N;
+
+      if (history.length <= keepLastN) {
+        return { error: "conversation too short to compact" };
+      }
+
+      // Auto mode: check if contextSize exceeds percent of contextWindow.
+      if (opts?.auto === true) {
+        const stored = await deps.conversationStore.getCompactPercent(conversationId);
+        const percent = stored ?? DEFAULT_COMPACT_PERCENT;
+        if (percent <= 0) return { error: "auto-compact disabled" };
+        const metrics = await deps.conversationStore.loadMetrics(conversationId);
+        const lastTurn = metrics[metrics.length - 1];
+        if (lastTurn === undefined) return { error: "no metrics" };
+        const contextSize = lastTurn.contextSize;
+        if (contextSize === undefined) return { error: "no context size" };
+
+        // Resolve the model's context window.
+        const modelName = opts.modelName;
+        if (modelName === undefined || deps.resolveModelInfo === undefined) {
+          return { error: "cannot resolve model info" };
+        }
+        const info = await deps.resolveModelInfo(modelName);
+        if (info?.contextWindow === undefined) {
+          return { error: "model context window unknown" };
+        }
+        const threshold = Math.floor(info.contextWindow * (percent / 100));
+        if (contextSize < threshold) return { error: "threshold not exceeded" };
+      }
+
+      // Split: old messages to summarize + recent messages to keep.
+      const toSummarize = history.slice(0, history.length - keepLastN);
+      const toKeep = history.slice(history.length - keepLastN);
+
+      // Resolve provider
+      let provider: ProviderContract;
+      let modelOverride: string | undefined;
+      if (opts?.modelName !== undefined && deps.resolveModel !== undefined) {
+        const resolved = deps.resolveModel(opts.modelName);
+        if (resolved === undefined) return { error: `unknown model: ${opts.modelName}` };
+        provider = resolved.provider;
+        modelOverride = resolved.model;
+      } else {
+        provider = deps.resolveProvider();
+      }
+
+      // Build the summarization request: system prompt + conversation text + instruction
+      const conversationText = formatMessagesForSummary(toSummarize);
+      const summaryRequest: ChatMessage = {
+        role: "user",
+        chunks: [
+          {
+            type: "text",
+            text: `Please summarize the following conversation:\n\n${conversationText}`,
+          },
+        ],
+      };
+
+      const providerOpts: ProviderStreamOptions = {
+        maxTokens: 2000,
+        ...(modelOverride !== undefined ? { model: modelOverride } : {}),
+        ...(deps.logger !== undefined
+          ? { logger: deps.logger.child({ conversationId, attrs: { compaction: true } }) }
+          : {}),
+      };
+
+      // Reconstruct the system prompt on compaction (fresh variable
+      // resolution — files/cwd/time may have changed since construction).
+      // The construct call also persists the result for future turns. When
+      // the system-prompt service is unavailable, fall back to the
+      // compaction-only system prompt (current behavior, no regression).
+      const systemPromptService = deps.resolveSystemPrompt?.();
+      let compactionSystemPrompt: string;
+      if (systemPromptService !== undefined) {
+        const cwd = (await deps.conversationStore.getEffectiveCwd(conversationId)) ?? process.cwd();
+        const workspaceId = await deps.conversationStore.getWorkspaceId(conversationId);
+        const computerId = await deps.conversationStore.getEffectiveComputer(conversationId);
+        const constructed = await systemPromptService.construct(conversationId, cwd, {
+          ...(opts?.modelName !== undefined ? { model: opts.modelName } : {}),
+          workspaceId,
+          ...(computerId !== null ? { computerId } : {}),
+        });
+        compactionSystemPrompt = `${constructed}\n\n${COMPACTION_SYSTEM_PROMPT}`;
+      } else {
+        compactionSystemPrompt = COMPACTION_SYSTEM_PROMPT;
+      }
+
+      // Call the provider and accumulate the summary
+      let summary = "";
+      for await (const event of provider.stream([summaryRequest], [], {
+        ...providerOpts,
+        systemPrompt: compactionSystemPrompt,
+      })) {
+        if ((event as ProviderEvent).type === "text-delta") {
+          summary += (event as { delta: string }).delta;
+        } else if ((event as ProviderEvent).type === "error") {
+          return { error: (event as { message: string }).message };
+        }
+      }
+
+      if (summary.trim().length === 0) {
+        return { error: "model produced empty summary" };
+      }
+
+      // Non-destructive: fork the full pre-compaction history to a new
+      // archive conversation. The original conversation keeps its ID
+      // (so messaging between agents still works) and gets the compacted
+      // content. The archive inherits the original's compactedFrom,
+      // creating a chain: A → Y → X → ...
+      const archiveId = crypto.randomUUID();
+      await deps.conversationStore.forkHistory(conversationId, archiveId);
+
+      // Replace history: [system: summary] + recent messages
+      const summaryMessage: ChatMessage = {
+        role: "system",
+        chunks: [
+          {
+            type: "text",
+            text: `The following is a summary of the previous conversation:\n\n${summary}`,
+          },
+        ],
+      };
+
+      await deps.conversationStore.replaceHistory(conversationId, [summaryMessage, ...toKeep]);
+      await deps.conversationStore.setCompactedFrom(conversationId, archiveId);
+
+      const result: CompactionResult = {
+        summary,
+        newConversationId: archiveId,
+        messagesSummarized: toSummarize.length,
+        messagesKept: toKeep.length,
+      };
+
+      deps.emit(conversationCompacted, {
+        conversationId,
+        newConversationId: archiveId,
+        messagesSummarized: toSummarize.length,
+        messagesKept: toKeep.length,
+      });
+
+      return result;
+    },
+  };
 }
diff --git a/packages/session-orchestrator/src/pure.test.ts b/packages/session-orchestrator/src/pure.test.ts
index 2cbe15f..c75cb82 100644
--- a/packages/session-orchestrator/src/pure.test.ts
+++ b/packages/session-orchestrator/src/pure.test.ts
@@ -1,163 +1,163 @@
 import type { ProviderContract } from "@dispatch/kernel";
 import { describe, expect, it } from "vitest";
 import {
-	buildUserMessage,
-	cumulativeSleepMs,
-	defaultDispatchPolicy,
-	delayFor,
-	generateTurnId,
-	RETRY_BUDGET_MS,
-	RETRY_SCHEDULE_MS,
-	RETRY_TAIL_MS,
-	resolveReasoningEffort,
-	selectFirstProvider,
+  buildUserMessage,
+  cumulativeSleepMs,
+  defaultDispatchPolicy,
+  delayFor,
+  generateTurnId,
+  RETRY_BUDGET_MS,
+  RETRY_SCHEDULE_MS,
+  RETRY_TAIL_MS,
+  resolveReasoningEffort,
+  selectFirstProvider,
 } from "./pure.js";
 
 describe("buildUserMessage", () => {
-	it("creates a user message with a single text chunk", () => {
-		const msg = buildUserMessage("hello world");
-		expect(msg.role).toBe("user");
-		expect(msg.chunks).toHaveLength(1);
-		expect(msg.chunks[0]).toEqual({ type: "text", text: "hello world" });
-	});
-
-	it("preserves empty text", () => {
-		const msg = buildUserMessage("");
-		expect(msg.role).toBe("user");
-		expect(msg.chunks[0]).toEqual({ type: "text", text: "" });
-	});
+  it("creates a user message with a single text chunk", () => {
+    const msg = buildUserMessage("hello world");
+    expect(msg.role).toBe("user");
+    expect(msg.chunks).toHaveLength(1);
+    expect(msg.chunks[0]).toEqual({ type: "text", text: "hello world" });
+  });
+
+  it("preserves empty text", () => {
+    const msg = buildUserMessage("");
+    expect(msg.role).toBe("user");
+    expect(msg.chunks[0]).toEqual({ type: "text", text: "" });
+  });
 });
 
 describe("selectFirstProvider", () => {
-	it("returns the first provider from a non-empty map", () => {
-		const provider: ProviderContract = {
-			id: "test-provider",
-			stream: async function* () {},
-		};
-		const providers = new Map<string, ProviderContract>();
-		providers.set("test-provider", provider);
-
-		expect(selectFirstProvider(providers)).toBe(provider);
-	});
-
-	it("throws when the map is empty", () => {
-		const providers = new Map<string, ProviderContract>();
-		expect(() => selectFirstProvider(providers)).toThrow("No providers registered");
-	});
-
-	it("returns the first inserted provider when multiple exist", () => {
-		const first: ProviderContract = { id: "first", stream: async function* () {} };
-		const second: ProviderContract = { id: "second", stream: async function* () {} };
-		const providers = new Map<string, ProviderContract>();
-		providers.set("first", first);
-		providers.set("second", second);
-
-		expect(selectFirstProvider(providers).id).toBe("first");
-	});
+  it("returns the first provider from a non-empty map", () => {
+    const provider: ProviderContract = {
+      id: "test-provider",
+      stream: async function* () {},
+    };
+    const providers = new Map<string, ProviderContract>();
+    providers.set("test-provider", provider);
+
+    expect(selectFirstProvider(providers)).toBe(provider);
+  });
+
+  it("throws when the map is empty", () => {
+    const providers = new Map<string, ProviderContract>();
+    expect(() => selectFirstProvider(providers)).toThrow("No providers registered");
+  });
+
+  it("returns the first inserted provider when multiple exist", () => {
+    const first: ProviderContract = { id: "first", stream: async function* () {} };
+    const second: ProviderContract = { id: "second", stream: async function* () {} };
+    const providers = new Map<string, ProviderContract>();
+    providers.set("first", first);
+    providers.set("second", second);
+
+    expect(selectFirstProvider(providers).id).toBe("first");
+  });
 });
 
 describe("defaultDispatchPolicy", () => {
-	it("returns maxConcurrent: 1, eager: true", () => {
-		expect(defaultDispatchPolicy()).toEqual({ maxConcurrent: 1, eager: true });
-	});
+  it("returns maxConcurrent: 1, eager: true", () => {
+    expect(defaultDispatchPolicy()).toEqual({ maxConcurrent: 1, eager: true });
+  });
 });
 
 describe("generateTurnId", () => {
-	it("returns a string starting with 'turn-'", () => {
-		const id = generateTurnId();
-		expect(id).toMatch(/^turn-/);
-	});
-
-	it("returns unique ids", () => {
-		const ids = new Set(Array.from({ length: 100 }, () => generateTurnId()));
-		expect(ids.size).toBe(100);
-	});
+  it("returns a string starting with 'turn-'", () => {
+    const id = generateTurnId();
+    expect(id).toMatch(/^turn-/);
+  });
+
+  it("returns unique ids", () => {
+    const ids = new Set(Array.from({ length: 100 }, () => generateTurnId()));
+    expect(ids.size).toBe(100);
+  });
 });
 
 describe("resolveReasoningEffort", () => {
-	it("override wins over stored", () => {
-		expect(resolveReasoningEffort("low", "high")).toBe("low");
-		expect(resolveReasoningEffort("max", "medium")).toBe("max");
-	});
-
-	it("stored wins over default", () => {
-		expect(resolveReasoningEffort(undefined, "medium")).toBe("medium");
-		expect(resolveReasoningEffort(undefined, "xhigh")).toBe("xhigh");
-	});
-
-	it("default is 'high' when both are absent", () => {
-		expect(resolveReasoningEffort(undefined, null)).toBe("high");
-	});
-
-	it("all 5 levels pass through as override", () => {
-		expect(resolveReasoningEffort("low", null)).toBe("low");
-		expect(resolveReasoningEffort("medium", null)).toBe("medium");
-		expect(resolveReasoningEffort("high", null)).toBe("high");
-		expect(resolveReasoningEffort("xhigh", null)).toBe("xhigh");
-		expect(resolveReasoningEffort("max", null)).toBe("max");
-	});
-
-	it("all 5 levels pass through as stored", () => {
-		expect(resolveReasoningEffort(undefined, "low")).toBe("low");
-		expect(resolveReasoningEffort(undefined, "medium")).toBe("medium");
-		expect(resolveReasoningEffort(undefined, "high")).toBe("high");
-		expect(resolveReasoningEffort(undefined, "xhigh")).toBe("xhigh");
-		expect(resolveReasoningEffort(undefined, "max")).toBe("max");
-	});
+  it("override wins over stored", () => {
+    expect(resolveReasoningEffort("low", "high")).toBe("low");
+    expect(resolveReasoningEffort("max", "medium")).toBe("max");
+  });
+
+  it("stored wins over default", () => {
+    expect(resolveReasoningEffort(undefined, "medium")).toBe("medium");
+    expect(resolveReasoningEffort(undefined, "xhigh")).toBe("xhigh");
+  });
+
+  it("default is 'high' when both are absent", () => {
+    expect(resolveReasoningEffort(undefined, null)).toBe("high");
+  });
+
+  it("all 5 levels pass through as override", () => {
+    expect(resolveReasoningEffort("low", null)).toBe("low");
+    expect(resolveReasoningEffort("medium", null)).toBe("medium");
+    expect(resolveReasoningEffort("high", null)).toBe("high");
+    expect(resolveReasoningEffort("xhigh", null)).toBe("xhigh");
+    expect(resolveReasoningEffort("max", null)).toBe("max");
+  });
+
+  it("all 5 levels pass through as stored", () => {
+    expect(resolveReasoningEffort(undefined, "low")).toBe("low");
+    expect(resolveReasoningEffort(undefined, "medium")).toBe("medium");
+    expect(resolveReasoningEffort(undefined, "high")).toBe("high");
+    expect(resolveReasoningEffort(undefined, "xhigh")).toBe("xhigh");
+    expect(resolveReasoningEffort(undefined, "max")).toBe("max");
+  });
 });
 
 describe("retry backoff schedule (delayFor)", () => {
-	it("emits the stepped head: 5s, 10s, 30s, 60s, 5m, 10m, 15m, 30m", () => {
-		expect(delayFor(0)).toBe(5_000);
-		expect(delayFor(1)).toBe(10_000);
-		expect(delayFor(2)).toBe(30_000);
-		expect(delayFor(3)).toBe(60_000);
-		expect(delayFor(4)).toBe(300_000);
-		expect(delayFor(5)).toBe(600_000);
-		expect(delayFor(6)).toBe(900_000);
-		expect(delayFor(7)).toBe(1_800_000);
-	});
-
-	it("repeats 30m after the head", () => {
-		expect(delayFor(8)).toBe(RETRY_TAIL_MS);
-		expect(delayFor(9)).toBe(RETRY_TAIL_MS);
-		expect(delayFor(20)).toBe(RETRY_TAIL_MS);
-	});
-
-	it("gives up (returns undefined) once cumulative sleep exceeds 8h", () => {
-		// Head sums to 3,705,000 ms; +1,800,000 per extra step. 8h = 28,800,000.
-		// attempt 20 cumulative = 3,705,000 + 13*1,800,000 = 27,105,000 (< 8h) → retry.
-		expect(delayFor(20)).toBe(RETRY_TAIL_MS);
-		// attempt 21 cumulative = 27,105,000 + 1,800,000 = 28,905,000 (> 8h) → stop.
-		expect(delayFor(21)).toBeUndefined();
-	});
-
-	it("cumulativeSleepMs matches the sum of the schedule", () => {
-		expect(cumulativeSleepMs(0)).toBe(5_000);
-		expect(cumulativeSleepMs(1)).toBe(15_000);
-		expect(cumulativeSleepMs(7)).toBe(RETRY_SCHEDULE_MS.reduce((a, b) => a + b, 0));
-		// 8h budget is 28,800,000 ms.
-		expect(RETRY_BUDGET_MS).toBe(8 * 60 * 60 * 1000);
-		// The last retry (attempt 20) keeps cumulative under budget.
-		expect(cumulativeSleepMs(20)).toBeLessThanOrEqual(RETRY_BUDGET_MS);
-		// The next (attempt 21) exceeds it.
-		expect(cumulativeSleepMs(21)).toBeGreaterThan(RETRY_BUDGET_MS);
-	});
-
-	it("the full schedule has 21 retries then stops", () => {
-		const schedule: number[] = [];
-		let attempt = 0;
-		while (true) {
-			const delay = delayFor(attempt);
-			if (delay === undefined) break;
-			schedule.push(delay);
-			attempt++;
-		}
-		expect(schedule).toHaveLength(21);
-		expect(schedule[0]).toBe(5_000);
-		expect(schedule.at(-1)).toBe(RETRY_TAIL_MS);
-		// 8 stepped head + 13 tail repeats.
-		expect(schedule.slice(0, 8)).toEqual([...RETRY_SCHEDULE_MS]);
-		expect(schedule.slice(8).every((d) => d === RETRY_TAIL_MS)).toBe(true);
-	});
+  it("emits the stepped head: 5s, 10s, 30s, 60s, 5m, 10m, 15m, 30m", () => {
+    expect(delayFor(0)).toBe(5_000);
+    expect(delayFor(1)).toBe(10_000);
+    expect(delayFor(2)).toBe(30_000);
+    expect(delayFor(3)).toBe(60_000);
+    expect(delayFor(4)).toBe(300_000);
+    expect(delayFor(5)).toBe(600_000);
+    expect(delayFor(6)).toBe(900_000);
+    expect(delayFor(7)).toBe(1_800_000);
+  });
+
+  it("repeats 30m after the head", () => {
+    expect(delayFor(8)).toBe(RETRY_TAIL_MS);
+    expect(delayFor(9)).toBe(RETRY_TAIL_MS);
+    expect(delayFor(20)).toBe(RETRY_TAIL_MS);
+  });
+
+  it("gives up (returns undefined) once cumulative sleep exceeds 8h", () => {
+    // Head sums to 3,705,000 ms; +1,800,000 per extra step. 8h = 28,800,000.
+    // attempt 20 cumulative = 3,705,000 + 13*1,800,000 = 27,105,000 (< 8h) → retry.
+    expect(delayFor(20)).toBe(RETRY_TAIL_MS);
+    // attempt 21 cumulative = 27,105,000 + 1,800,000 = 28,905,000 (> 8h) → stop.
+    expect(delayFor(21)).toBeUndefined();
+  });
+
+  it("cumulativeSleepMs matches the sum of the schedule", () => {
+    expect(cumulativeSleepMs(0)).toBe(5_000);
+    expect(cumulativeSleepMs(1)).toBe(15_000);
+    expect(cumulativeSleepMs(7)).toBe(RETRY_SCHEDULE_MS.reduce((a, b) => a + b, 0));
+    // 8h budget is 28,800,000 ms.
+    expect(RETRY_BUDGET_MS).toBe(8 * 60 * 60 * 1000);
+    // The last retry (attempt 20) keeps cumulative under budget.
+    expect(cumulativeSleepMs(20)).toBeLessThanOrEqual(RETRY_BUDGET_MS);
+    // The next (attempt 21) exceeds it.
+    expect(cumulativeSleepMs(21)).toBeGreaterThan(RETRY_BUDGET_MS);
+  });
+
+  it("the full schedule has 21 retries then stops", () => {
+    const schedule: number[] = [];
+    let attempt = 0;
+    while (true) {
+      const delay = delayFor(attempt);
+      if (delay === undefined) break;
+      schedule.push(delay);
+      attempt++;
+    }
+    expect(schedule).toHaveLength(21);
+    expect(schedule[0]).toBe(5_000);
+    expect(schedule.at(-1)).toBe(RETRY_TAIL_MS);
+    // 8 stepped head + 13 tail repeats.
+    expect(schedule.slice(0, 8)).toEqual([...RETRY_SCHEDULE_MS]);
+    expect(schedule.slice(8).every((d) => d === RETRY_TAIL_MS)).toBe(true);
+  });
 });
diff --git a/packages/session-orchestrator/src/pure.ts b/packages/session-orchestrator/src/pure.ts
index a028cbe..2208e8f 100644
--- a/packages/session-orchestrator/src/pure.ts
+++ b/packages/session-orchestrator/src/pure.ts
@@ -1,12 +1,12 @@
 import type {
-	ChatMessage,
-	ProviderContract,
-	ReasoningEffort,
-	ToolDispatchPolicy,
+  ChatMessage,
+  ProviderContract,
+  ReasoningEffort,
+  ToolDispatchPolicy,
 } from "@dispatch/kernel";
 
 export function buildUserMessage(text: string): ChatMessage {
-	return { role: "user", chunks: [{ type: "text", text }] };
+  return { role: "user", chunks: [{ type: "text", text }] };
 }
 
 // ── Provider-error retry backoff schedule ───────────────────────────────────
@@ -20,7 +20,7 @@ export function buildUserMessage(text: string): ChatMessage {
  * After the head is exhausted, {@link RETRY_TAIL_MS} (30m) repeats.
  */
 export const RETRY_SCHEDULE_MS = [
-	5_000, 10_000, 30_000, 60_000, 300_000, 600_000, 900_000, 1_800_000,
+  5_000, 10_000, 30_000, 60_000, 300_000, 600_000, 900_000, 1_800_000,
 ] as const;
 
 /** Tail delay (ms) repeated after the stepped head: 30 minutes. */
@@ -34,11 +34,11 @@ export const RETRY_BUDGET_MS = 8 * 60 * 60 * 1000;
  * Pure — no I/O, no clock.
  */
 export function cumulativeSleepMs(attempt: number): number {
-	let sum = 0;
-	for (let i = 0; i <= attempt; i++) {
-		sum += i < RETRY_SCHEDULE_MS.length ? (RETRY_SCHEDULE_MS[i] ?? RETRY_TAIL_MS) : RETRY_TAIL_MS;
-	}
-	return sum;
+  let sum = 0;
+  for (let i = 0; i <= attempt; i++) {
+    sum += i < RETRY_SCHEDULE_MS.length ? (RETRY_SCHEDULE_MS[i] ?? RETRY_TAIL_MS) : RETRY_TAIL_MS;
+  }
+  return sum;
 }
 
 /**
@@ -50,10 +50,10 @@ export function cumulativeSleepMs(attempt: number): number {
  * cumulative scheduled sleep is reached, then give up.
  */
 export function delayFor(attempt: number): number | undefined {
-	const scheduled = RETRY_SCHEDULE_MS[attempt];
-	const delay = scheduled !== undefined ? scheduled : RETRY_TAIL_MS;
-	if (cumulativeSleepMs(attempt) > RETRY_BUDGET_MS) return undefined; // over budget → stop
-	return delay;
+  const scheduled = RETRY_SCHEDULE_MS[attempt];
+  const delay = scheduled !== undefined ? scheduled : RETRY_TAIL_MS;
+  if (cumulativeSleepMs(attempt) > RETRY_BUDGET_MS) return undefined; // over budget → stop
+  return delay;
 }
 
 /**
@@ -62,10 +62,10 @@ export function delayFor(attempt: number): number | undefined {
  * Pure — no I/O, no ambient state.
  */
 export function resolveReasoningEffort(
-	override: ReasoningEffort | undefined,
-	stored: ReasoningEffort | null,
+  override: ReasoningEffort | undefined,
+  stored: ReasoningEffort | null,
 ): ReasoningEffort {
-	return override ?? stored ?? "high";
+  return override ?? stored ?? "high";
 }
 
 /**
@@ -79,30 +79,30 @@ export function resolveReasoningEffort(
  * "no model override" code path untouched. Pure — no I/O, no ambient state.
  */
 export function resolveModelName(
-	override: string | undefined,
-	stored: string | null,
+  override: string | undefined,
+  stored: string | null,
 ): string | undefined {
-	return override ?? stored ?? undefined;
+  return override ?? stored ?? undefined;
 }
 
 export function selectFirstProvider(
-	providers: ReadonlyMap<string, ProviderContract>,
+  providers: ReadonlyMap<string, ProviderContract>,
 ): ProviderContract {
-	const first = providers.values().next();
-	if (first.done === true || first.value === undefined) {
-		throw new Error("No providers registered — at least one provider is required to run a turn.");
-	}
-	return first.value;
+  const first = providers.values().next();
+  if (first.done === true || first.value === undefined) {
+    throw new Error("No providers registered — at least one provider is required to run a turn.");
+  }
+  return first.value;
 }
 
 export function resolveTools(tools: ReadonlyMap<string, unknown>): readonly unknown[] {
-	return [...tools.values()];
+  return [...tools.values()];
 }
 
 export function defaultDispatchPolicy(): ToolDispatchPolicy {
-	return { maxConcurrent: 1, eager: true };
+  return { maxConcurrent: 1, eager: true };
 }
 
 export function generateTurnId(): string {
-	return `turn-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
+  return `turn-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`;
 }
diff --git a/packages/session-orchestrator/src/queue.test.ts b/packages/session-orchestrator/src/queue.test.ts
index adf5d9a..a09a441 100644
--- a/packages/session-orchestrator/src/queue.test.ts
+++ b/packages/session-orchestrator/src/queue.test.ts
@@ -1,15 +1,15 @@
 import type { ConversationStore } from "@dispatch/conversation-store";
 import type {
-	AgentEvent,
-	ChatMessage,
-	ProviderContract,
-	ProviderEvent,
-	ReasoningEffort,
-	RunTurnInput,
-	RunTurnResult,
-	StoredChunk,
-	ToolContract,
-	TurnMetrics,
+  AgentEvent,
+  ChatMessage,
+  ProviderContract,
+  ProviderEvent,
+  ReasoningEffort,
+  RunTurnInput,
+  RunTurnResult,
+  StoredChunk,
+  ToolContract,
+  TurnMetrics,
 } from "@dispatch/kernel";
 import { runTurn } from "@dispatch/kernel";
 import { createMessageQueueService } from "@dispatch/message-queue";
@@ -21,177 +21,177 @@ import type { ToolAssembly } from "./tools-filter.js";
 //     a shared test-helper module wired between test files is a coupling smell) ---
 
 function createInMemoryStore(): ConversationStore & {
-	readonly data: Map<string, ChatMessage[]>;
-	readonly metricsData: Map<string, TurnMetrics[]>;
-	readonly cwdData: Map<string, string>;
-	readonly effortData: Map<string, ReasoningEffort>;
-	readonly modelData: Map<string, string>;
+  readonly data: Map<string, ChatMessage[]>;
+  readonly metricsData: Map<string, TurnMetrics[]>;
+  readonly cwdData: Map<string, string>;
+  readonly effortData: Map<string, ReasoningEffort>;
+  readonly modelData: Map<string, string>;
 } {
-	const data = new Map<string, ChatMessage[]>();
-	const metricsData = new Map<string, TurnMetrics[]>();
-	const cwdData = new Map<string, string>();
-	const effortData = new Map<string, ReasoningEffort>();
-	const modelData = new Map<string, string>();
-	return {
-		data,
-		metricsData,
-		cwdData,
-		effortData,
-		modelData,
-		async append(conversationId, messages) {
-			const existing = data.get(conversationId) ?? [];
-			data.set(conversationId, [...existing, ...messages]);
-		},
-		async load(conversationId) {
-			return [...(data.get(conversationId) ?? [])];
-		},
-		async loadSince(conversationId, sinceSeq) {
-			const messages = data.get(conversationId) ?? [];
-			const result: StoredChunk[] = [];
-			let seq = 1;
-			for (const msg of messages) {
-				for (const chunk of msg.chunks) {
-					if (sinceSeq === undefined || seq > sinceSeq) {
-						result.push({ seq, role: msg.role, chunk });
-					}
-					seq++;
-				}
-			}
-			return result;
-		},
-		async appendMetrics(conversationId, metrics) {
-			const existing = metricsData.get(conversationId) ?? [];
-			metricsData.set(conversationId, [...existing, metrics]);
-		},
-		async loadMetrics(conversationId) {
-			return [...(metricsData.get(conversationId) ?? [])];
-		},
-		async getCwd(conversationId) {
-			return cwdData.get(conversationId) ?? null;
-		},
-		async setCwd(conversationId, cwd) {
-			cwdData.set(conversationId, cwd);
-		},
-		async clearCwd(conversationId) {
-			cwdData.delete(conversationId);
-		},
-		async getComputerId() {
-			return null;
-		},
-		async setComputerId() {},
-		async clearComputerId() {},
-		async getReasoningEffort(conversationId) {
-			return effortData.get(conversationId) ?? null;
-		},
-		async setReasoningEffort(conversationId, effort) {
-			effortData.set(conversationId, effort);
-		},
-		async getModel(conversationId) {
-			return modelData.get(conversationId) ?? null;
-		},
-		async setModel(conversationId, model) {
-			if (model === "") {
-				modelData.delete(conversationId);
-			} else {
-				modelData.set(conversationId, model);
-			}
-		},
-		async listConversations() {
-			return [];
-		},
-		async getConversationMeta() {
-			return null;
-		},
-		async setConversationTitle() {},
-		async getConversationStatus() {
-			return null;
-		},
-		async setConversationStatus() {},
-		async replaceHistory() {},
-		async getCompactPercent() {
-			return null;
-		},
-		async setCompactPercent() {},
-		async forkHistory() {},
-		async setCompactedFrom() {},
-		async getWorkspace() {
-			return null;
-		},
-		async ensureWorkspace(id) {
-			return {
-				id,
-				title: id,
-				defaultCwd: null,
-				defaultComputerId: null,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async setWorkspaceTitle(id, title) {
-			return {
-				id,
-				title,
-				defaultCwd: null,
-				defaultComputerId: null,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async setWorkspaceDefaultCwd(id, defaultCwd) {
-			return {
-				id,
-				title: id,
-				defaultCwd,
-				defaultComputerId: null,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async setWorkspaceDefaultComputerId(id, defaultComputerId) {
-			return {
-				id,
-				title: id,
-				defaultCwd: null,
-				defaultComputerId,
-				createdAt: 0,
-				lastActivityAt: 0,
-			};
-		},
-		async deleteWorkspace() {
-			return { closedCount: 0 };
-		},
-		async listWorkspaces() {
-			return [];
-		},
-		async getWorkspaceId() {
-			return "default";
-		},
-		async setWorkspaceId() {},
-		async getEffectiveCwd(conversationId) {
-			return cwdData.get(conversationId) ?? null;
-		},
-		async getEffectiveComputer() {
-			return null;
-		},
-	};
+  const data = new Map<string, ChatMessage[]>();
+  const metricsData = new Map<string, TurnMetrics[]>();
+  const cwdData = new Map<string, string>();
+  const effortData = new Map<string, ReasoningEffort>();
+  const modelData = new Map<string, string>();
+  return {
+    data,
+    metricsData,
+    cwdData,
+    effortData,
+    modelData,
+    async append(conversationId, messages) {
+      const existing = data.get(conversationId) ?? [];
+      data.set(conversationId, [...existing, ...messages]);
+    },
+    async load(conversationId) {
+      return [...(data.get(conversationId) ?? [])];
+    },
+    async loadSince(conversationId, sinceSeq) {
+      const messages = data.get(conversationId) ?? [];
+      const result: StoredChunk[] = [];
+      let seq = 1;
+      for (const msg of messages) {
+        for (const chunk of msg.chunks) {
+          if (sinceSeq === undefined || seq > sinceSeq) {
+            result.push({ seq, role: msg.role, chunk });
+          }
+          seq++;
+        }
+      }
+      return result;
+    },
+    async appendMetrics(conversationId, metrics) {
+      const existing = metricsData.get(conversationId) ?? [];
+      metricsData.set(conversationId, [...existing, metrics]);
+    },
+    async loadMetrics(conversationId) {
+      return [...(metricsData.get(conversationId) ?? [])];
+    },
+    async getCwd(conversationId) {
+      return cwdData.get(conversationId) ?? null;
+    },
+    async setCwd(conversationId, cwd) {
+      cwdData.set(conversationId, cwd);
+    },
+    async clearCwd(conversationId) {
+      cwdData.delete(conversationId);
+    },
+    async getComputerId() {
+      return null;
+    },
+    async setComputerId() {},
+    async clearComputerId() {},
+    async getReasoningEffort(conversationId) {
+      return effortData.get(conversationId) ?? null;
+    },
+    async setReasoningEffort(conversationId, effort) {
+      effortData.set(conversationId, effort);
+    },
+    async getModel(conversationId) {
+      return modelData.get(conversationId) ?? null;
+    },
+    async setModel(conversationId, model) {
+      if (model === "") {
+        modelData.delete(conversationId);
+      } else {
+        modelData.set(conversationId, model);
+      }
+    },
+    async listConversations() {
+      return [];
+    },
+    async getConversationMeta() {
+      return null;
+    },
+    async setConversationTitle() {},
+    async getConversationStatus() {
+      return null;
+    },
+    async setConversationStatus() {},
+    async replaceHistory() {},
+    async getCompactPercent() {
+      return null;
+    },
+    async setCompactPercent() {},
+    async forkHistory() {},
+    async setCompactedFrom() {},
+    async getWorkspace() {
+      return null;
+    },
+    async ensureWorkspace(id) {
+      return {
+        id,
+        title: id,
+        defaultCwd: null,
+        defaultComputerId: null,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async setWorkspaceTitle(id, title) {
+      return {
+        id,
+        title,
+        defaultCwd: null,
+        defaultComputerId: null,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async setWorkspaceDefaultCwd(id, defaultCwd) {
+      return {
+        id,
+        title: id,
+        defaultCwd,
+        defaultComputerId: null,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async setWorkspaceDefaultComputerId(id, defaultComputerId) {
+      return {
+        id,
+        title: id,
+        defaultCwd: null,
+        defaultComputerId,
+        createdAt: 0,
+        lastActivityAt: 0,
+      };
+    },
+    async deleteWorkspace() {
+      return { closedCount: 0 };
+    },
+    async listWorkspaces() {
+      return [];
+    },
+    async getWorkspaceId() {
+      return "default";
+    },
+    async setWorkspaceId() {},
+    async getEffectiveCwd(conversationId) {
+      return cwdData.get(conversationId) ?? null;
+    },
+    async getEffectiveComputer() {
+      return null;
+    },
+  };
 }
 
 function identityApplyToolsFilter(assembly: ToolAssembly): Promise<ToolAssembly> {
-	return Promise.resolve(assembly);
+  return Promise.resolve(assembly);
 }
 
 function noTools(): readonly ToolContract[] {
-	return [];
+  return [];
 }
 
 function simpleProvider(): ProviderContract {
-	return {
-		id: "fake",
-		stream: async function* () {
-			yield { type: "text-delta", delta: "ok" } as ProviderEvent;
-			yield { type: "finish", reason: "stop" } as ProviderEvent;
-		},
-	};
+  return {
+    id: "fake",
+    stream: async function* () {
+      yield { type: "text-delta", delta: "ok" } as ProviderEvent;
+      yield { type: "finish", reason: "stop" } as ProviderEvent;
+    },
+  };
 }
 
 /**
@@ -201,395 +201,395 @@ function simpleProvider(): ProviderContract {
  * of @dispatch/* — it's a plain fake of the outermost runTurn edge.
  */
 function createDrainingCaptureRunTurn(): {
-	captured: RunTurnInput[];
-	drainedMessages: ChatMessage[];
-	wasDrainCalled: () => boolean;
-	runTurn: (input: RunTurnInput) => Promise<RunTurnResult>;
+  captured: RunTurnInput[];
+  drainedMessages: ChatMessage[];
+  wasDrainCalled: () => boolean;
+  runTurn: (input: RunTurnInput) => Promise<RunTurnResult>;
 } {
-	const captured: RunTurnInput[] = [];
-	const drainedMessages: ChatMessage[] = [];
-	let drainCalled = false;
-	return {
-		captured,
-		drainedMessages,
-		wasDrainCalled: () => drainCalled,
-		runTurn: async (input) => {
-			captured.push(input);
-			if (input.drainSteering !== undefined) {
-				drainCalled = true;
-				const drained = input.drainSteering();
-				drainedMessages.push(...drained);
-			}
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "ok" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		},
-	};
+  const captured: RunTurnInput[] = [];
+  const drainedMessages: ChatMessage[] = [];
+  let drainCalled = false;
+  return {
+    captured,
+    drainedMessages,
+    wasDrainCalled: () => drainCalled,
+    runTurn: async (input) => {
+      captured.push(input);
+      if (input.drainSteering !== undefined) {
+        drainCalled = true;
+        const drained = input.drainSteering();
+        drainedMessages.push(...drained);
+      }
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "ok" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    },
+  };
 }
 
 function waitForSealed(
-	orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
-	conversationId: string,
+  orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
+  conversationId: string,
 ): Promise<void> {
-	return new Promise((resolve) => {
-		const unsub = orchestrator.subscribe(conversationId, (e) => {
-			if (e.type === "turn-sealed") {
-				unsub();
-				resolve();
-			}
-		});
-	});
+  return new Promise((resolve) => {
+    const unsub = orchestrator.subscribe(conversationId, (e) => {
+      if (e.type === "turn-sealed") {
+        unsub();
+        resolve();
+      }
+    });
+  });
 }
 
 function waitForSealedCount(
-	orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
-	conversationId: string,
-	count: number,
+  orchestrator: ReturnType<typeof createSessionOrchestrator>["orchestrator"],
+  conversationId: string,
+  count: number,
 ): Promise<void> {
-	return new Promise((resolve) => {
-		let seen = 0;
-		const unsub = orchestrator.subscribe(conversationId, (e) => {
-			if (e.type === "turn-sealed") {
-				seen++;
-				if (seen >= count) {
-					unsub();
-					resolve();
-				}
-			}
-		});
-	});
+  return new Promise((resolve) => {
+    let seen = 0;
+    const unsub = orchestrator.subscribe(conversationId, (e) => {
+      if (e.type === "turn-sealed") {
+        seen++;
+        if (seen >= count) {
+          unsub();
+          resolve();
+        }
+      }
+    });
+  });
 }
 
 function isSteering(e: AgentEvent): e is Extract<AgentEvent, { type: "steering" }> {
-	return e.type === "steering";
+  return e.type === "steering";
 }
 
 function isUserMessage(e: AgentEvent): e is Extract<AgentEvent, { type: "user-message" }> {
-	return e.type === "user-message";
+  return e.type === "user-message";
 }
 
 function createTestQueue() {
-	return createMessageQueueService({
-		id: () => `q-${Math.random().toString(36).slice(2, 8)}`,
-		now: () => 1000,
-		notify: () => {},
-	});
+  return createMessageQueueService({
+    id: () => `q-${Math.random().toString(36).slice(2, 8)}`,
+    now: () => 1000,
+    notify: () => {},
+  });
 }
 
 // --- drainSteering (mid-turn, at the tool-result boundary) ---
 
 describe("drainSteering", () => {
-	it("drainSteering drains the queue + emits a steering event + returns one combined user message", async () => {
-		const store = createInMemoryStore();
-		const queue = createTestQueue();
-		queue.enqueue("conv-drain", "first");
-		queue.enqueue("conv-drain", "second");
-
-		const { captured, drainedMessages, runTurn: captureRunTurn } = createDrainingCaptureRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			resolveQueue: () => queue,
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-drain", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-drain", text: "go" });
-		await waitForSealed(orchestrator, "conv-drain");
-		unsub();
-
-		// drainSteering was wired on the RunTurnInput
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.drainSteering).toBeDefined();
-		expect(typeof captured[0]?.drainSteering).toBe("function");
-
-		// The fake runTurn called drainSteering → returned one combined user message
-		expect(drainedMessages).toHaveLength(1);
-		const steerMsg = drainedMessages[0];
-		if (steerMsg === undefined) throw new Error("expected drained message");
-		expect(steerMsg.role).toBe("user");
-		expect(steerMsg.chunks).toHaveLength(1);
-		const chunk = steerMsg.chunks[0];
-		if (chunk === undefined) throw new Error("expected chunk");
-		expect(chunk.type).toBe("text");
-		if (chunk.type === "text") {
-			expect(chunk.text).toBe("first\n\nsecond");
-		}
-
-		// The queue was drained (cleared)
-		expect(queue.getQueue("conv-drain")).toHaveLength(0);
-
-		// A steering event was emitted into the hub with the combined text
-		const steering = events.find(isSteering);
-		expect(steering).toBeDefined();
-		expect(steering?.conversationId).toBe("conv-drain");
-		expect(steering?.text).toBe("first\n\nsecond");
-		expect(steering?.turnId).toMatch(/^turn-/);
-	});
-
-	it("drainSteering on an empty queue returns [] and emits nothing", async () => {
-		const store = createInMemoryStore();
-		const queue = createTestQueue();
-
-		const {
-			drainedMessages,
-			wasDrainCalled,
-			runTurn: captureRunTurn,
-		} = createDrainingCaptureRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			resolveQueue: () => queue,
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-empty", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-empty", text: "go" });
-		await waitForSealed(orchestrator, "conv-empty");
-		unsub();
-
-		// drainSteering was wired and called, but returned []
-		expect(wasDrainCalled()).toBe(true);
-		expect(drainedMessages).toHaveLength(0);
-
-		// No steering event was emitted
-		expect(events.filter(isSteering)).toHaveLength(0);
-	});
-
-	it("no queue ext (resolveQueue undefined) → drainSteering omitted; turn unchanged", async () => {
-		const store = createInMemoryStore();
-
-		const { captured, wasDrainCalled, runTurn: captureRunTurn } = createDrainingCaptureRunTurn();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => ({ id: "p", stream: async function* () {} }),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: captureRunTurn,
-			// resolveQueue intentionally omitted — feature degrades off
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-noqueue", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-noqueue", text: "go" });
-		await waitForSealed(orchestrator, "conv-noqueue");
-		unsub();
-
-		// drainSteering is absent from the RunTurnInput (not undefined — omitted)
-		expect(captured).toHaveLength(1);
-		expect(captured[0]?.drainSteering).toBeUndefined();
-		expect(wasDrainCalled()).toBe(false);
-
-		// No steering event; turn sealed normally
-		expect(events.filter(isSteering)).toHaveLength(0);
-		expect(events.filter((e) => e.type === "turn-sealed")).toHaveLength(1);
-	});
+  it("drainSteering drains the queue + emits a steering event + returns one combined user message", async () => {
+    const store = createInMemoryStore();
+    const queue = createTestQueue();
+    queue.enqueue("conv-drain", "first");
+    queue.enqueue("conv-drain", "second");
+
+    const { captured, drainedMessages, runTurn: captureRunTurn } = createDrainingCaptureRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      resolveQueue: () => queue,
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-drain", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-drain", text: "go" });
+    await waitForSealed(orchestrator, "conv-drain");
+    unsub();
+
+    // drainSteering was wired on the RunTurnInput
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.drainSteering).toBeDefined();
+    expect(typeof captured[0]?.drainSteering).toBe("function");
+
+    // The fake runTurn called drainSteering → returned one combined user message
+    expect(drainedMessages).toHaveLength(1);
+    const steerMsg = drainedMessages[0];
+    if (steerMsg === undefined) throw new Error("expected drained message");
+    expect(steerMsg.role).toBe("user");
+    expect(steerMsg.chunks).toHaveLength(1);
+    const chunk = steerMsg.chunks[0];
+    if (chunk === undefined) throw new Error("expected chunk");
+    expect(chunk.type).toBe("text");
+    if (chunk.type === "text") {
+      expect(chunk.text).toBe("first\n\nsecond");
+    }
+
+    // The queue was drained (cleared)
+    expect(queue.getQueue("conv-drain")).toHaveLength(0);
+
+    // A steering event was emitted into the hub with the combined text
+    const steering = events.find(isSteering);
+    expect(steering).toBeDefined();
+    expect(steering?.conversationId).toBe("conv-drain");
+    expect(steering?.text).toBe("first\n\nsecond");
+    expect(steering?.turnId).toMatch(/^turn-/);
+  });
+
+  it("drainSteering on an empty queue returns [] and emits nothing", async () => {
+    const store = createInMemoryStore();
+    const queue = createTestQueue();
+
+    const {
+      drainedMessages,
+      wasDrainCalled,
+      runTurn: captureRunTurn,
+    } = createDrainingCaptureRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      resolveQueue: () => queue,
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-empty", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-empty", text: "go" });
+    await waitForSealed(orchestrator, "conv-empty");
+    unsub();
+
+    // drainSteering was wired and called, but returned []
+    expect(wasDrainCalled()).toBe(true);
+    expect(drainedMessages).toHaveLength(0);
+
+    // No steering event was emitted
+    expect(events.filter(isSteering)).toHaveLength(0);
+  });
+
+  it("no queue ext (resolveQueue undefined) → drainSteering omitted; turn unchanged", async () => {
+    const store = createInMemoryStore();
+
+    const { captured, wasDrainCalled, runTurn: captureRunTurn } = createDrainingCaptureRunTurn();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => ({ id: "p", stream: async function* () {} }),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: captureRunTurn,
+      // resolveQueue intentionally omitted — feature degrades off
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-noqueue", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-noqueue", text: "go" });
+    await waitForSealed(orchestrator, "conv-noqueue");
+    unsub();
+
+    // drainSteering is absent from the RunTurnInput (not undefined — omitted)
+    expect(captured).toHaveLength(1);
+    expect(captured[0]?.drainSteering).toBeUndefined();
+    expect(wasDrainCalled()).toBe(false);
+
+    // No steering event; turn sealed normally
+    expect(events.filter(isSteering)).toHaveLength(0);
+    expect(events.filter((e) => e.type === "turn-sealed")).toHaveLength(1);
+  });
 });
 
 // --- Post-seal carry (turn ended with a non-empty queue → new turn) ---
 
 describe("post-seal carry", () => {
-	it("post-seal: non-empty queue → a new turn starts with the combined message", async () => {
-		const store = createInMemoryStore();
-		const queue = createTestQueue();
-		queue.enqueue("conv-carry", "queued-a");
-		queue.enqueue("conv-carry", "queued-b");
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => simpleProvider(),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			resolveQueue: () => queue,
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-carry", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-carry", text: "original" });
-		// Wait for the original turn + the carried turn to both seal.
-		await waitForSealedCount(orchestrator, "conv-carry", 2);
-		unsub();
-
-		// Two user-message events: the original prompt + the carried combined text.
-		const userMessages = events.filter(isUserMessage);
-		expect(userMessages).toHaveLength(2);
-		expect(userMessages[0]?.text).toBe("original");
-		expect(userMessages[1]?.text).toBe("queued-a\n\nqueued-b");
-
-		// No steering event — the carry case emits user-message, not steering.
-		expect(events.filter(isSteering)).toHaveLength(0);
-
-		// The queue was drained by the carry.
-		expect(queue.getQueue("conv-carry")).toHaveLength(0);
-
-		// Both turns persisted (original + carry).
-		expect(store.data.get("conv-carry")?.length).toBeGreaterThanOrEqual(4);
-	});
-
-	it("post-seal: empty queue → no new turn", async () => {
-		const store = createInMemoryStore();
-		const queue = createTestQueue();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => simpleProvider(),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			resolveQueue: () => queue,
-		});
-
-		const events: AgentEvent[] = [];
-		const unsub = orchestrator.subscribe("conv-no-carry", (e) => events.push(e));
-
-		orchestrator.startTurn({ conversationId: "conv-no-carry", text: "original" });
-		await waitForSealed(orchestrator, "conv-no-carry");
-		// Give the carry check a chance to run (it's in the finally, synchronous
-		// after turn-sealed, but await yields first).
-		await new Promise<void>((resolve) => setTimeout(resolve, 10));
-		unsub();
-
-		// Only one user-message (the original) — no carry turn.
-		expect(events.filter(isUserMessage)).toHaveLength(1);
-		expect(events.filter((e) => e.type === "turn-sealed")).toHaveLength(1);
-	});
+  it("post-seal: non-empty queue → a new turn starts with the combined message", async () => {
+    const store = createInMemoryStore();
+    const queue = createTestQueue();
+    queue.enqueue("conv-carry", "queued-a");
+    queue.enqueue("conv-carry", "queued-b");
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => simpleProvider(),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      resolveQueue: () => queue,
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-carry", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-carry", text: "original" });
+    // Wait for the original turn + the carried turn to both seal.
+    await waitForSealedCount(orchestrator, "conv-carry", 2);
+    unsub();
+
+    // Two user-message events: the original prompt + the carried combined text.
+    const userMessages = events.filter(isUserMessage);
+    expect(userMessages).toHaveLength(2);
+    expect(userMessages[0]?.text).toBe("original");
+    expect(userMessages[1]?.text).toBe("queued-a\n\nqueued-b");
+
+    // No steering event — the carry case emits user-message, not steering.
+    expect(events.filter(isSteering)).toHaveLength(0);
+
+    // The queue was drained by the carry.
+    expect(queue.getQueue("conv-carry")).toHaveLength(0);
+
+    // Both turns persisted (original + carry).
+    expect(store.data.get("conv-carry")?.length).toBeGreaterThanOrEqual(4);
+  });
+
+  it("post-seal: empty queue → no new turn", async () => {
+    const store = createInMemoryStore();
+    const queue = createTestQueue();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => simpleProvider(),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      resolveQueue: () => queue,
+    });
+
+    const events: AgentEvent[] = [];
+    const unsub = orchestrator.subscribe("conv-no-carry", (e) => events.push(e));
+
+    orchestrator.startTurn({ conversationId: "conv-no-carry", text: "original" });
+    await waitForSealed(orchestrator, "conv-no-carry");
+    // Give the carry check a chance to run (it's in the finally, synchronous
+    // after turn-sealed, but await yields first).
+    await new Promise<void>((resolve) => setTimeout(resolve, 10));
+    unsub();
+
+    // Only one user-message (the original) — no carry turn.
+    expect(events.filter(isUserMessage)).toHaveLength(1);
+    expect(events.filter((e) => e.type === "turn-sealed")).toHaveLength(1);
+  });
 });
 
 // --- enqueue facade (the single entry transports call) ---
 
 describe("enqueue", () => {
-	it("enqueue when idle → starts a turn (startedTurn:true)", async () => {
-		const store = createInMemoryStore();
-		const queue = createTestQueue();
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => simpleProvider(),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn,
-			resolveQueue: () => queue,
-		});
-
-		const result = orchestrator.enqueue({ conversationId: "conv-idle", text: "hello" });
-		expect(result.startedTurn).toBe(true);
-		expect(result.queue).toHaveLength(0);
-
-		await waitForSealed(orchestrator, "conv-idle");
-
-		// The turn ran and persisted.
-		expect(store.data.get("conv-idle")).toBeDefined();
-		expect(store.data.get("conv-idle")?.length).toBeGreaterThanOrEqual(2);
-	});
-
-	it("enqueue when active → queues (startedTurn:false, snapshot with the message)", async () => {
-		const store = createInMemoryStore();
-		const queue = createTestQueue();
-
-		let resolveFirst: (() => void) | undefined;
-		const firstBlocker = new Promise<void>((resolve) => {
-			resolveFirst = resolve;
-		});
-		let callCount = 0;
-		const blockingFirstRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
-			callCount++;
-			if (callCount === 1) {
-				await firstBlocker;
-			}
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => simpleProvider(),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: blockingFirstRunTurn,
-			resolveQueue: () => queue,
-		});
-
-		// Start the original turn (it blocks in runTurn).
-		orchestrator.startTurn({ conversationId: "conv-active", text: "first" });
-		// Let the turn reach the blocked runTurn call.
-		await new Promise<void>((resolve) => setTimeout(resolve, 10));
-
-		// Enqueue while active.
-		const result = orchestrator.enqueue({ conversationId: "conv-active", text: "second" });
-		expect(result.startedTurn).toBe(false);
-		expect(result.queue).toHaveLength(1);
-		expect(result.queue[0]?.text).toBe("second");
-
-		// The queue holds the enqueued message.
-		expect(queue.getQueue("conv-active")).toHaveLength(1);
-
-		// Release the original turn → it seals → post-seal carry starts a new
-		// turn with the enqueued message. Subscribe before releasing to catch
-		// both turn-sealed events.
-		const sealed = waitForSealedCount(orchestrator, "conv-active", 2);
-		resolveFirst?.();
-		await sealed;
-	});
-
-	it("enqueue when active + no queue ext → startedTurn:false, empty queue (degraded)", async () => {
-		const store = createInMemoryStore();
-
-		let resolveFirst: (() => void) | undefined;
-		const firstBlocker = new Promise<void>((resolve) => {
-			resolveFirst = resolve;
-		});
-		let callCount = 0;
-		const blockingFirstRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
-			callCount++;
-			if (callCount === 1) {
-				await firstBlocker;
-			}
-			return {
-				messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
-				usage: { inputTokens: 1, outputTokens: 1 },
-				finishReason: "stop",
-			};
-		};
-
-		const { orchestrator } = createSessionOrchestrator({
-			conversationStore: store,
-			resolveProvider: () => simpleProvider(),
-			resolveTools: noTools,
-			applyToolsFilter: identityApplyToolsFilter,
-			runTurn: blockingFirstRunTurn,
-			// resolveQueue omitted — no queue extension loaded (degraded)
-		});
-
-		orchestrator.startTurn({ conversationId: "conv-degraded", text: "first" });
-		await new Promise<void>((resolve) => setTimeout(resolve, 10));
-
-		// Enqueue while active, but no queue ext → message dropped, empty snapshot.
-		const result = orchestrator.enqueue({ conversationId: "conv-degraded", text: "second" });
-		expect(result.startedTurn).toBe(false);
-		expect(result.queue).toHaveLength(0);
-
-		// Release the original turn; no carry (no queue ext).
-		const sealed = waitForSealed(orchestrator, "conv-degraded");
-		resolveFirst?.();
-		await sealed;
-	});
+  it("enqueue when idle → starts a turn (startedTurn:true)", async () => {
+    const store = createInMemoryStore();
+    const queue = createTestQueue();
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => simpleProvider(),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn,
+      resolveQueue: () => queue,
+    });
+
+    const result = orchestrator.enqueue({ conversationId: "conv-idle", text: "hello" });
+    expect(result.startedTurn).toBe(true);
+    expect(result.queue).toHaveLength(0);
+
+    await waitForSealed(orchestrator, "conv-idle");
+
+    // The turn ran and persisted.
+    expect(store.data.get("conv-idle")).toBeDefined();
+    expect(store.data.get("conv-idle")?.length).toBeGreaterThanOrEqual(2);
+  });
+
+  it("enqueue when active → queues (startedTurn:false, snapshot with the message)", async () => {
+    const store = createInMemoryStore();
+    const queue = createTestQueue();
+
+    let resolveFirst: (() => void) | undefined;
+    const firstBlocker = new Promise<void>((resolve) => {
+      resolveFirst = resolve;
+    });
+    let callCount = 0;
+    const blockingFirstRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
+      callCount++;
+      if (callCount === 1) {
+        await firstBlocker;
+      }
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => simpleProvider(),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: blockingFirstRunTurn,
+      resolveQueue: () => queue,
+    });
+
+    // Start the original turn (it blocks in runTurn).
+    orchestrator.startTurn({ conversationId: "conv-active", text: "first" });
+    // Let the turn reach the blocked runTurn call.
+    await new Promise<void>((resolve) => setTimeout(resolve, 10));
+
+    // Enqueue while active.
+    const result = orchestrator.enqueue({ conversationId: "conv-active", text: "second" });
+    expect(result.startedTurn).toBe(false);
+    expect(result.queue).toHaveLength(1);
+    expect(result.queue[0]?.text).toBe("second");
+
+    // The queue holds the enqueued message.
+    expect(queue.getQueue("conv-active")).toHaveLength(1);
+
+    // Release the original turn → it seals → post-seal carry starts a new
+    // turn with the enqueued message. Subscribe before releasing to catch
+    // both turn-sealed events.
+    const sealed = waitForSealedCount(orchestrator, "conv-active", 2);
+    resolveFirst?.();
+    await sealed;
+  });
+
+  it("enqueue when active + no queue ext → startedTurn:false, empty queue (degraded)", async () => {
+    const store = createInMemoryStore();
+
+    let resolveFirst: (() => void) | undefined;
+    const firstBlocker = new Promise<void>((resolve) => {
+      resolveFirst = resolve;
+    });
+    let callCount = 0;
+    const blockingFirstRunTurn = async (_input: RunTurnInput): Promise<RunTurnResult> => {
+      callCount++;
+      if (callCount === 1) {
+        await firstBlocker;
+      }
+      return {
+        messages: [{ role: "assistant", chunks: [{ type: "text", text: "done" }] }],
+        usage: { inputTokens: 1, outputTokens: 1 },
+        finishReason: "stop",
+      };
+    };
+
+    const { orchestrator } = createSessionOrchestrator({
+      conversationStore: store,
+      resolveProvider: () => simpleProvider(),
+      resolveTools: noTools,
+      applyToolsFilter: identityApplyToolsFilter,
+      runTurn: blockingFirstRunTurn,
+      // resolveQueue omitted — no queue extension loaded (degraded)
+    });
+
+    orchestrator.startTurn({ conversationId: "conv-degraded", text: "first" });
+    await new Promise<void>((resolve) => setTimeout(resolve, 10));
+
+    // Enqueue while active, but no queue ext → message dropped, empty snapshot.
+    const result = orchestrator.enqueue({ conversationId: "conv-degraded", text: "second" });
+    expect(result.startedTurn).toBe(false);
+    expect(result.queue).toHaveLength(0);
+
+    // Release the original turn; no carry (no queue ext).
+    const sealed = waitForSealed(orchestrator, "conv-degraded");
+    resolveFirst?.();
+    await sealed;
+  });
 });
diff --git a/packages/session-orchestrator/src/tools-filter.test.ts b/packages/session-orchestrator/src/tools-filter.test.ts
index 3233469..a3c439b 100644
--- a/packages/session-orchestrator/src/tools-filter.test.ts
+++ b/packages/session-orchestrator/src/tools-filter.test.ts
@@ -3,73 +3,73 @@ import { describe, expect, it } from "vitest";
 import { filterRemoteIncompatibleTools, type ToolAssembly } from "./tools-filter.js";
 
 function fakeTool(name: string): ToolContract {
-	return {
-		name,
-		description: `Fake tool: ${name}`,
-		parameters: { type: "object" },
-		execute: async () => ({ content: "ok" }),
-	};
+  return {
+    name,
+    description: `Fake tool: ${name}`,
+    parameters: { type: "object" },
+    execute: async () => ({ content: "ok" }),
+  };
 }
 
 const baseAssembly: ToolAssembly = {
-	tools: [fakeTool("lsp"), fakeTool("mcp__x"), fakeTool("run_shell")],
-	conversationId: "conv-1",
+  tools: [fakeTool("lsp"), fakeTool("mcp__x"), fakeTool("run_shell")],
+  conversationId: "conv-1",
 };
 
 describe("filterRemoteIncompatibleTools", () => {
-	it("REMOTE (computerId set): drops 'lsp' and any '__' namespaced tool, keeps 'run_shell'", () => {
-		const remote: ToolAssembly = { ...baseAssembly, computerId: "my-server" };
-		const result = filterRemoteIncompatibleTools(remote);
-		const names = result.tools.map((t) => t.name);
-		expect(names).not.toContain("lsp");
-		expect(names).not.toContain("mcp__x");
-		expect(names).toContain("run_shell");
-		expect(result.tools).toHaveLength(1);
-	});
+  it("REMOTE (computerId set): drops 'lsp' and any '__' namespaced tool, keeps 'run_shell'", () => {
+    const remote: ToolAssembly = { ...baseAssembly, computerId: "my-server" };
+    const result = filterRemoteIncompatibleTools(remote);
+    const names = result.tools.map((t) => t.name);
+    expect(names).not.toContain("lsp");
+    expect(names).not.toContain("mcp__x");
+    expect(names).toContain("run_shell");
+    expect(result.tools).toHaveLength(1);
+  });
 
-	it("REMOTE: preserves computerId + cwd + conversationId in the returned assembly", () => {
-		const remote: ToolAssembly = {
-			tools: [fakeTool("lsp"), fakeTool("run_shell")],
-			conversationId: "conv-2",
-			cwd: "/work",
-			computerId: "ssh-host",
-		};
-		const result = filterRemoteIncompatibleTools(remote);
-		expect(result.computerId).toBe("ssh-host");
-		expect(result.cwd).toBe("/work");
-		expect(result.conversationId).toBe("conv-2");
-	});
+  it("REMOTE: preserves computerId + cwd + conversationId in the returned assembly", () => {
+    const remote: ToolAssembly = {
+      tools: [fakeTool("lsp"), fakeTool("run_shell")],
+      conversationId: "conv-2",
+      cwd: "/work",
+      computerId: "ssh-host",
+    };
+    const result = filterRemoteIncompatibleTools(remote);
+    expect(result.computerId).toBe("ssh-host");
+    expect(result.cwd).toBe("/work");
+    expect(result.conversationId).toBe("conv-2");
+  });
 
-	it("LOCAL (computerId undefined): passthrough — nothing is dropped", () => {
-		const local: ToolAssembly = { ...baseAssembly };
-		const result = filterRemoteIncompatibleTools(local);
-		expect(result.tools).toHaveLength(3);
-		const names = result.tools.map((t) => t.name);
-		expect(names).toContain("lsp");
-		expect(names).toContain("mcp__x");
-		expect(names).toContain("run_shell");
-	});
+  it("LOCAL (computerId undefined): passthrough — nothing is dropped", () => {
+    const local: ToolAssembly = { ...baseAssembly };
+    const result = filterRemoteIncompatibleTools(local);
+    expect(result.tools).toHaveLength(3);
+    const names = result.tools.map((t) => t.name);
+    expect(names).toContain("lsp");
+    expect(names).toContain("mcp__x");
+    expect(names).toContain("run_shell");
+  });
 
-	it("LOCAL: returns the exact same assembly object (byte-identical)", () => {
-		const local: ToolAssembly = { ...baseAssembly };
-		const result = filterRemoteIncompatibleTools(local);
-		expect(result).toBe(local);
-	});
+  it("LOCAL: returns the exact same assembly object (byte-identical)", () => {
+    const local: ToolAssembly = { ...baseAssembly };
+    const result = filterRemoteIncompatibleTools(local);
+    expect(result).toBe(local);
+  });
 
-	it("REMOTE: drops multiple MCP-namespaced tools (serverId__toolName pattern)", () => {
-		const remote: ToolAssembly = {
-			tools: [
-				fakeTool("lsp"),
-				fakeTool("filesystem__read"),
-				fakeTool("github__create_issue"),
-				fakeTool("run_shell"),
-				fakeTool("write_file"),
-			],
-			conversationId: "conv-3",
-			computerId: "host",
-		};
-		const result = filterRemoteIncompatibleTools(remote);
-		const names = result.tools.map((t) => t.name);
-		expect(names).toEqual(["run_shell", "write_file"]);
-	});
+  it("REMOTE: drops multiple MCP-namespaced tools (serverId__toolName pattern)", () => {
+    const remote: ToolAssembly = {
+      tools: [
+        fakeTool("lsp"),
+        fakeTool("filesystem__read"),
+        fakeTool("github__create_issue"),
+        fakeTool("run_shell"),
+        fakeTool("write_file"),
+      ],
+      conversationId: "conv-3",
+      computerId: "host",
+    };
+    const result = filterRemoteIncompatibleTools(remote);
+    const names = result.tools.map((t) => t.name);
+    expect(names).toEqual(["run_shell", "write_file"]);
+  });
 });
diff --git a/packages/session-orchestrator/src/tools-filter.ts b/packages/session-orchestrator/src/tools-filter.ts
index 913e574..28e82bf 100644
--- a/packages/session-orchestrator/src/tools-filter.ts
+++ b/packages/session-orchestrator/src/tools-filter.ts
@@ -2,24 +2,24 @@ import { defineFilter, type FilterDescriptor, type ToolContract } from "@dispatc
 
 /** Per-turn tool-assembly value threaded through the `tools` filter chain. */
 export interface ToolAssembly {
-	/** The tool set resolved for this turn (the value filters transform). */
-	readonly tools: readonly ToolContract[];
-	/** This turn's working directory (verbatim from the request), for cwd-aware filters. */
-	readonly cwd?: string;
-	/**
-	 * The computer this turn executes on (SSH alias), for computer-aware
-	 * filters. Omitted/`undefined` = LOCAL (today's behavior). When set, the
-	 * turn is REMOTE — {@link filterRemoteIncompatibleTools} drops tools that
-	 * cannot run over SFTP (local-process servers). Mirrors `cwd?`.
-	 */
-	readonly computerId?: string;
-	/** The conversation this turn belongs to. */
-	readonly conversationId: string;
+  /** The tool set resolved for this turn (the value filters transform). */
+  readonly tools: readonly ToolContract[];
+  /** This turn's working directory (verbatim from the request), for cwd-aware filters. */
+  readonly cwd?: string;
+  /**
+   * The computer this turn executes on (SSH alias), for computer-aware
+   * filters. Omitted/`undefined` = LOCAL (today's behavior). When set, the
+   * turn is REMOTE — {@link filterRemoteIncompatibleTools} drops tools that
+   * cannot run over SFTP (local-process servers). Mirrors `cwd?`.
+   */
+  readonly computerId?: string;
+  /** The conversation this turn belongs to. */
+  readonly conversationId: string;
 }
 
 /** Filter chain run once per turn to transform the tool set before it reaches runTurn. */
 export const toolsFilter: FilterDescriptor<ToolAssembly> = defineFilter<ToolAssembly>(
-	"session-orchestrator/tools",
+  "session-orchestrator/tools",
 );
 
 /**
@@ -42,18 +42,18 @@ export const toolsFilter: FilterDescriptor<ToolAssembly> = defineFilter<ToolAsse
  * MCP's `filterMcpTools` extraction pattern.
  */
 export function filterRemoteIncompatibleTools(assembly: ToolAssembly): ToolAssembly {
-	// LOCAL — passthrough, byte-identical to today.
-	if (assembly.computerId === undefined) return assembly;
-	// REMOTE — drop lsp + MCP-namespaced tools (local-process servers).
-	const filtered = assembly.tools.filter((tool) => {
-		if (tool.name === "lsp") return false;
-		if (tool.name.includes("__")) return false;
-		return true;
-	});
-	return {
-		tools: filtered,
-		...(assembly.cwd !== undefined ? { cwd: assembly.cwd } : {}),
-		...(assembly.computerId !== undefined ? { computerId: assembly.computerId } : {}),
-		conversationId: assembly.conversationId,
-	};
+  // LOCAL — passthrough, byte-identical to today.
+  if (assembly.computerId === undefined) return assembly;
+  // REMOTE — drop lsp + MCP-namespaced tools (local-process servers).
+  const filtered = assembly.tools.filter((tool) => {
+    if (tool.name === "lsp") return false;
+    if (tool.name.includes("__")) return false;
+    return true;
+  });
+  return {
+    tools: filtered,
+    ...(assembly.cwd !== undefined ? { cwd: assembly.cwd } : {}),
+    ...(assembly.computerId !== undefined ? { computerId: assembly.computerId } : {}),
+    conversationId: assembly.conversationId,
+  };
 }
diff --git a/packages/session-orchestrator/tsconfig.json b/packages/session-orchestrator/tsconfig.json
index 2ca3bd2..bc729fc 100644
--- a/packages/session-orchestrator/tsconfig.json
+++ b/packages/session-orchestrator/tsconfig.json
@@ -1,12 +1,12 @@
 {
-	"extends": "../../tsconfig.base.json",
-	"compilerOptions": { "rootDir": "src", "outDir": "dist", "composite": true },
-	"include": ["src/**/*.ts"],
-	"references": [
-		{ "path": "../kernel" },
-		{ "path": "../conversation-store" },
-		{ "path": "../credential-store" },
-		{ "path": "../message-queue" },
-		{ "path": "../system-prompt" }
-	]
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": { "rootDir": "src", "outDir": "dist", "composite": true },
+  "include": ["src/**/*.ts"],
+  "references": [
+    { "path": "../kernel" },
+    { "path": "../conversation-store" },
+    { "path": "../credential-store" },
+    { "path": "../message-queue" },
+    { "path": "../system-prompt" }
+  ]
 }