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import { conversationStoreHandle } from "@dispatch/conversation-store";
import { credentialStoreHandle } from "@dispatch/credential-store";
import type { Extension, HostAPI, Manifest } from "@dispatch/kernel";
import { runTurn } from "@dispatch/kernel";
import { messageQueueHandle } from "@dispatch/message-queue";
import { systemPromptHandle } from "@dispatch/system-prompt";
import {
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",
],
},
};
export function activate(host: HostAPI): void {
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;
}
},
});
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);
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);
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);
}
export const extension: Extension = {
manifest,
activate,
};
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