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+import type {
+ CompactResponse,
+ ComputerStatusResponse,
+ LspStatusResponse,
+ McpStatusResponse,
+ ModelMetadata,
+ ReasoningEffort,
+ SystemPromptVariable,
+ TestComputerResponse,
+ WarmResponse,
+} from "@dispatch/transport-contract";
+import type { SurfaceSpec } from "@dispatch/ui-contract";
+import type { ComputerEntry, ConversationStatus, ImageInput } from "@dispatch/wire";
+import type { WebSocketLike } from "../adapters/ws";
+import type { ProtocolState } from "../core/protocol";
+import type {
+ AccountUsageProviderId,
+ AccountUsageResult,
+ AccountUsageSettingsResult,
+ UpdateAccountUsageSettingsRequest,
+} from "../features/account-usage";
+import type { ChatStore } from "../features/chat";
+import type {
+ ConcurrencyCooldownResult,
+ ConcurrencyDeleteResult,
+ ConcurrencyLimitResult,
+ ConcurrencyLimitsResult,
+ ConcurrencyStatusResult,
+} from "../features/concurrency";
+import type {
+ HeartbeatConfigPatch,
+ HeartbeatConfigResult,
+ HeartbeatNextRunResult,
+ HeartbeatRunsResult,
+ HeartbeatStopResult,
+} from "../features/heartbeat";
+import type { LayoutStore } from "../features/layout";
+import type { TextFileClient } from "../features/markdown";
+import type {
+ NamedAgent,
+ NamedAgentDeleteResult,
+ NamedAgentInput,
+ NamedAgentSaveResult,
+ NamedAgentSelectionSnapshot,
+ NamedAgentsResult,
+} from "../features/named-agents";
+import type { PluginsStore } from "../features/plugins";
+import type { SearchBackendConfigResult } from "../features/search-settings";
+import type { Tab } from "../features/tabs";
+import type { VisionSettings, VisionSettingsPatch } from "../features/vision";
+import type { TileLayoutStore } from "../features/workspaces";
+
+/** Outcome of a manual `POST /chat/warm` (the "warm now" affordance). */
+export type WarmResult =
+ | { readonly ok: true; readonly response: WarmResponse }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `PUT /conversations/:id/cwd`. */
+export type CwdResult =
+ | { readonly ok: true; readonly cwd: string | null }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `PUT /conversations/:id/computer` (set/clear the per-conversation computer). */
+export type ComputerResult =
+ | { readonly ok: true; readonly computerId: string | null }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `GET /computers/:alias/status` (the live connection state). */
+export type ComputerStatusResult =
+ | { readonly ok: true; readonly response: ComputerStatusResponse }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `POST /computers/:alias/test` (one-shot connectivity probe). */
+export type TestComputerResult =
+ | { readonly ok: true; readonly response: TestComputerResponse }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `GET /conversations/:id/lsp`. */
+export type LspResult =
+ | { readonly ok: true; readonly response: LspStatusResponse }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `GET /conversations/:id/mcp`. */
+export type McpResult =
+ | { readonly ok: true; readonly response: McpStatusResponse }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `PUT /conversations/:id/reasoning-effort`. */
+export type ReasoningEffortResult =
+ | { readonly ok: true; readonly reasoningEffort: ReasoningEffort }
+ | { readonly ok: false; readonly error: string };
+
+/**
+ * Outcome of `PUT /conversations/:id/thinking` (PROPOSED — see
+ * `backend-handoff.md`; the endpoint is not yet shipped by the backend).
+ */
+export type ThinkingResult =
+ | { readonly ok: true; readonly thinking: boolean }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `POST /conversations/:id/compact` (manual compaction). */
+export type CompactResult =
+ | { readonly ok: true; readonly response: CompactResponse }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `PUT /conversations/:id/compact-percent`. */
+export type CompactPercentResult =
+ | { readonly ok: true; readonly percent: number }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `PUT /settings/vision` (global vision-settings save). */
+export type VisionSettingsResult =
+ | { readonly ok: true; readonly settings: VisionSettings }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `GET /system-prompt` (global template load). */
+export type SystemPromptLoadResult =
+ | { readonly ok: true; readonly template: string }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of `PUT /system-prompt` (global template save). */
+export type SystemPromptSaveResult = SystemPromptLoadResult;
+
+/** Outcome of `GET /system-prompt/variables` (variable catalog). */
+export type SystemPromptVariablesResult =
+ | { readonly ok: true; readonly variables: readonly SystemPromptVariable[] }
+ | { readonly ok: false; readonly error: string };
+
+/** Outcome of persisting a chat-limit setting (localStorage; FE-local). */
+export type ChatLimitResult =
+ | { readonly ok: true; readonly chatLimit: number }
+ | { readonly ok: false; readonly error: string };
+
+export interface AppStore {
+ readonly tabs: readonly Tab[];
+ readonly activeConversationId: string | null;
+ /** The workspace currently in view (URL slug); tabs are filtered to it. */
+ readonly activeWorkspaceId: string;
+ /**
+ * The resolved HTTP API base URL (e.g. `http://localhost:24203`). Used to
+ * resolve relative image URLs served by the backend (`/images/…`) into
+ * absolute URLs for `<img src>`.
+ */
+ readonly httpBase: string;
+ readonly activeChat: ChatStore;
+ readonly models: readonly string[];
+ /** Per-model metadata (contextWindow, etc.) from `GET /models`. */
+ readonly modelInfo: Readonly<Record<string, ModelMetadata>>;
+ readonly activeModel: string;
+ readonly catalog: ProtocolState["catalog"];
+ /** Every received surface spec, in catalog order — all auto-subscribed + expanded. */
+ readonly surfaces: readonly SurfaceSpec[];
+ readonly lastError: ProtocolState["lastError"];
+ /** The localStorage instance the store uses for persistence (tabs, chatLimit).
+ * Exposed so the shell can persist sidebar layout via the same adapter. */
+ readonly storage: Storage | undefined;
+ /**
+ * The current spec by id, or null if absent. With conversationId, require a
+ * snapshot received for that conversation (not a retained prior-scope spec).
+ */
+ surface(surfaceId: string, conversationId?: string): SurfaceSpec | null;
+ /**
+ * Send a user message (start a turn). Forwards any staged `images`
+ * (`ImageInput[]` — base64 data URLs / https URLs) on the `chat.send` op;
+ * the server passes them to a vision-capable model natively or transcribes
+ * them via vision handoff for a non-vision model. Omitted on the wire when
+ * none are staged. On a draft, promotes to a tab first.
+ */
+ send(text: string, images?: readonly ImageInput[]): void;
+ /**
+ * Enqueue a steering message onto the focused conversation's queue
+ * (`chat.queue` WS op). While a turn is generating, the message is delivered
+ * mid-turn at the next tool-result boundary; when idle, the server
+ * auto-starts a turn (equivalent to `send`). Safe to offer whenever the user
+ * wants to add input — the server owns the idle-vs-generating decision.
+ */
+ queueMessage(text: string, images?: readonly ImageInput[]): void;
+ /**
+ * Cancel (remove) a single queued steering message by id so it never runs
+ * (`chat.queue.cancel` WS op). Fire-and-forget + idempotent: the
+ * message-queue surface update reconciles the queue UI (the cancelled message
+ * leaves the snapshot). Targets the focused conversation's queue. The caller
+ * optimistically hides the row; a cancel of an already-drained / unknown
+ * message is a silent server no-op (nothing to roll back).
+ */
+ cancelQueuedMessage(messageId: string): void;
+ /** Select a raw model for the active conversation. Pass `snapshot` to record a Named Agent selection (plan §7). */
+ selectModel(model: string, snapshot?: NamedAgentSelectionSnapshot): void;
+ newDraft(): void;
+ /** Switch the active workspace (on route change) + reset to a fresh draft in it. */
+ setActiveWorkspace(workspaceId: string): void;
+ selectTab(conversationId: string): void;
+ closeTab(conversationId: string): void;
+ renameTab(conversationId: string, title: string): void;
+ /**
+ * Move a tab into a subagent group (the tab group parent's id) or out of
+ * any group (null). Purely presentational (NOT lineage): applied
+ * optimistically, persisted via `PUT /conversations/:id/tab-group` (synced
+ * to other clients by `conversation.tabGroupChanged`), reverted on failure.
+ */
+ setTabGroup(conversationId: string, parentId: string | null): void;
+ invoke(surfaceId: string, actionId: string, payload?: unknown): void;
+ /**
+ * Explicitly (re-)subscribe one surface, scoped to `conversationId` (or the
+ * focused conversation when absent) — the frontend-plugin ABI's
+ * `surfaces.subscribe` path (plan 03). The app auto-subscribes every
+ * catalog entry; this is the re-assertion port (same wire semantics).
+ */
+ subscribeSurface(surfaceId: string, conversationId?: string): void;
+ /** Drop one surface's subscription (the ABI's `surfaces.unsubscribe`). */
+ unsubscribeSurface(surfaceId: string, conversationId?: string): void;
+ /**
+ * Manually warm the focused conversation's prompt cache (`POST /chat/warm`).
+ * Returns null when no conversation is focused (a draft has nothing to warm).
+ */
+ warmNow(): Promise<WarmResult | null>;
+ /** The workspace conversation's persisted working directory, or null when unset. */
+ readonly cwd: string | null;
+ /** Invalidates live-file routing after known settings changes. */
+ readonly textFileContextRevision: number;
+ createTextFileClient(conversationId: string): TextFileClient;
+ /** The conversation workspace settings target: the active tab, or the pending draft's id. */
+ readonly currentConversationId: string;
+ /**
+ * Set the workspace conversation's working directory (`PUT /conversations/:id/cwd`).
+ * Works for a draft too (its id survives promotion), so the first turn runs in it.
+ */
+ setCwd(cwd: string): Promise<CwdResult | null>;
+ /**
+ * The workspace conversation's persisted computer (an SSH `Host` alias), or
+ * null when never set / local. Seeded from the backend on focus change.
+ */
+ readonly computerId: string | null;
+ /**
+ * Persist the workspace conversation's computer (`PUT /conversations/:id/computer`).
+ * Pass null to clear → the conversation inherits the workspace default → local.
+ * Works for a draft too (its id survives promotion). Not seen by the agent — a
+ * user-facing tool-execution target only.
+ */
+ setComputer(computerId: string | null): Promise<ComputerResult | null>;
+ /**
+ * Every remote computer discovered from the user's `~/.ssh/config`
+ * (`GET /computers`), fetched on boot. Read-only — there is no Computer CRUD
+ * (the user edits their ssh config to add one). Empty until the `ssh`
+ * extension lands.
+ */
+ readonly computers: readonly ComputerEntry[];
+ /**
+ * The live connection state of a computer (`GET /computers/:alias/status`):
+ * whether Dispatch currently holds an open SSH session to it. Returns null
+ * only if no alias is given (the focused conversation is local). Polled by the
+ * `ComputerField` while a computer is selected.
+ */
+ computerStatus(alias: string): Promise<ComputerStatusResult | null>;
+ /**
+ * One-shot connectivity probe (`POST /computers/:alias/test`): Dispatch opens
+ * an SSH connection to the alias, runs a trivial command, then closes. `ok` is
+ * true on success; `error` carries the failure reason otherwise.
+ */
+ testComputer(alias: string): Promise<TestComputerResult | null>;
+ /**
+ * The workspace conversation's persisted reasoning effort, or null when never
+ * set (the server then resolves turns at the default, `"high"`).
+ */
+ readonly reasoningEffort: ReasoningEffort | null;
+ /**
+ * Persist the workspace conversation's reasoning effort
+ * (`PUT /conversations/:id/reasoning-effort`). Works for a draft too (its id
+ * survives promotion), so the first turn already runs at the chosen level.
+ * Takes effect from the NEXT turn; resolution stays server-owned.
+ */
+ setReasoningEffort(level: ReasoningEffort): Promise<ReasoningEffortResult | null>;
+ /**
+ * The workspace conversation's persisted thinking flag, or null when never
+ * set (the server then resolves turns with thinking ON — the default).
+ * `false` ⇒ thinking disabled entirely (the SEPARATE "off" axis — NOT a
+ * zero-effort level; the umans route maps it to `reasoning_effort: "none"`).
+ * PROPOSED backend contract — see `backend-handoff.md`.
+ */
+ readonly thinking: boolean | null;
+ /**
+ * Persist the workspace conversation's thinking flag
+ * (`PUT /conversations/:id/thinking`). Works for a draft too (its id survives
+ * promotion), so the first turn already runs with the chosen setting. Takes
+ * effect from the NEXT turn; resolution stays server-owned.
+ * PROPOSED backend contract — see `backend-handoff.md`.
+ */
+ setThinking(enabled: boolean): Promise<ThinkingResult | null>;
+ /**
+ * Manually trigger conversation compaction (`POST /conversations/:id/compact`).
+ * Summarizes old messages + retains the most recent N. Returns null when no
+ * conversation is focused (a draft has nothing to compact).
+ */
+ compactNow(keepLastN?: number): Promise<CompactResult | null>;
+ /**
+ * Stop an in-flight generation (`POST /conversations/:id/stop`). Aborts the
+ * turn without closing the conversation — partial messages are persisted, the
+ * turn seals with `reason: "aborted"`, and the conversation goes `active → idle`.
+ * Returns null when no conversation is focused.
+ */
+ stopGeneration(): void;
+ /**
+ * The workspace conversation's auto-compact percent (0-100). `0` = disabled
+ * (manual only); a positive number = auto-compact triggers when the last
+ * turn's input tokens exceed it. Seeded from the backend on focus change.
+ */
+ readonly compactPercent: number | null;
+ /**
+ * Persist the workspace conversation's auto-compact percent
+ * (`PUT /conversations/:id/compact-percent`). `0` disables; 1-100 sets the
+ * trigger percentage of the model's context window. Default (null) is 85.
+ * number enables. Works for a draft too (its id survives promotion).
+ */
+ setCompactPercent(percent: number): Promise<CompactPercentResult | null>;
+ /**
+ * The GLOBAL vision settings (`GET /settings/vision`): `imageLimit` (max
+ * native images per turn before compaction; 0 = disabled) + `compactionModel`
+ * (which vision model transcribes old images; null = auto). Shared across all
+ * conversations. Seeded on boot; `null` = not yet fetched.
+ */
+ readonly visionSettings: VisionSettings | null;
+ /**
+ * Refetch the global vision settings (`GET /settings/vision`). Called by the
+ * vision-settings view on mount; also seeded on boot.
+ */
+ refreshVisionSettings(): Promise<void>;
+ /**
+ * Save a PARTIAL vision-settings update (`PUT /settings/vision`). Either
+ * field may be omitted. Returns the merged settings on success.
+ */
+ setVisionSettings(patch: VisionSettingsPatch): Promise<VisionSettingsResult | null>;
+ /**
+ * Fetch the workspace conversation's language-server status (`GET /conversations/:id/lsp`).
+ * The backend lazily spawns servers, so this may take a moment on the first call for a cwd.
+ */
+ lspStatus(): Promise<LspResult | null>;
+ /**
+ * Fetch the workspace conversation's MCP server status (`GET /conversations/:id/mcp`).
+ * Mirrors the LSP status endpoint: returns `{cwd, servers}` with empty `servers`
+ * when no cwd is set; the backend lazily connects servers, so this may take a
+ * moment on the first call for a cwd.
+ */
+ mcpStatus(): Promise<McpResult | null>;
+ /**
+ * Load the global system prompt template (`GET /system-prompt`). The template is
+ * conversation-agnostic; it is resolved once per conversation on first turn and
+ * persisted for prompt-cache safety.
+ */
+ loadSystemPrompt(): Promise<SystemPromptLoadResult>;
+ /**
+ * Persist the global system prompt template (`PUT /system-prompt`). Changes apply
+ * to new conversations on their first turn; existing conversations keep their
+ * resolved system prompt until compaction.
+ */
+ setSystemPrompt(template: string): Promise<SystemPromptSaveResult>;
+ /**
+ * Load the static catalog of available system prompt variables (`GET /system-prompt/variables`).
+ * Used by the builder to render the variable selector buttons.
+ */
+ loadSystemPromptVariables(): Promise<SystemPromptVariablesResult>;
+ /** The persisted chat limit (max loaded chunks per conversation). */
+ readonly chatLimit: number;
+ /**
+ * A conversation's backend lifecycle status (`active`/`idle`/`closed`), or
+ * `undefined` when unknown. Drives the tab-bar generating indicator
+ * (cross-device: a tab spinning because another device's turn is running).
+ */
+ conversationStatus(conversationId: string): ConversationStatus | undefined;
+ /**
+ * Whether at least one conversation in the given workspace is currently
+ * active or queued (generating / waiting for a concurrency slot) — drives
+ * the loading-dots indicator on workspace cards. Backed by a once-derived
+ * `activeWorkspaces` set (the open-tab set × the backend lifecycle statuses)
+ * so this is an O(1) lookup, not a per-card scan of the full tab list.
+ * Reactive: the set is a `$derived`, so a Svelte template expression calling
+ * this re-runs when the tab set or status map changes.
+ */
+ workspaceHasActiveConversations(workspaceId: string): boolean;
+ /**
+ * Persist + live-apply a new chat limit: writes `dispatch.chatLimit` to
+ * localStorage and propagates to every live chat store (trim if lower,
+ * deferred via the unload gate while a reader is scrolled up; no-op if
+ * higher — page unloaded history back in via "Show earlier"). Stores created
+ * afterwards pick the new limit up at creation. Always succeeds (FE-local).
+ */
+ setChatLimit(limit: number): Promise<ChatLimitResult>;
+ /**
+ * Wire the chat-limit unload gate (composition-root injection, called once by
+ * the shell after it owns the scroll region): unloading old chunks is allowed
+ * only while the gate returns true — i.e. the reader is stuck to the bottom —
+ * so a trim never yanks content out from under someone reading history.
+ * Before attachment unloading is allowed (the initial view starts at the
+ * bottom).
+ */
+ attachUnloadGate(gate: () => boolean): void;
+ /**
+ * Load the active workspace's heartbeat config
+ * (`GET /workspaces/:id/heartbeat`). Workspace-scoped (NOT per-conversation):
+ * the backend runs an autonomous agent loop on a configured interval, writing
+ * each run into a dedicated conversation. The config covers the system/task
+ * prompts, model, reasoning effort, interval, and an enabled flag.
+ */
+ heartbeatConfig(): Promise<HeartbeatConfigResult>;
+ /**
+ * Persist a partial heartbeat config patch
+ * (`PUT /workspaces/:id/heartbeat`). The backend merges the patch onto the
+ * stored config; returns the full updated config.
+ */
+ setHeartbeatConfig(patch: HeartbeatConfigPatch): Promise<HeartbeatConfigResult>;
+ /**
+ * Load the active workspace's heartbeat run history
+ * (`GET /workspaces/:id/heartbeat/runs`). Each run references the conversation
+ * it wrote to — open one via {@link watchConversation} to see its chat live.
+ */
+ heartbeatRuns(): Promise<HeartbeatRunsResult>;
+ /**
+ * Stop a running heartbeat run (`POST /workspaces/:id/heartbeat/runs/:runId/stop`).
+ * The run's in-flight turn seals (its conversation keeps streaming until it
+ * ends); the run's status flips to `stopped` (visible on the next runs poll).
+ */
+ stopHeartbeatRun(runId: string): Promise<HeartbeatStopResult>;
+ /**
+ * Fetch the server-authoritative next-run timestamp
+ * (`GET /workspaces/:id/heartbeat/next-run`) — when the next heartbeat run
+ * will fire (ISO 8601), or null when disabled / no run scheduled. The FE shows
+ * a live countdown from this. When the endpoint is absent (404 — backend
+ * hasn't shipped CR-HB-3 yet) it returns `ok: false` so the FE falls back to
+ * an approximation from the runs + config.
+ */
+ heartbeatNextRun(): Promise<HeartbeatNextRunResult>;
+ /**
+ * Open a "watch" on a conversation for a modal viewer (the heartbeat run-chat
+ * modal): ensures a live {@link ChatStore} for the conversation, subscribing
+ * to its turn stream (`chat.subscribe`) + loading history. Reuses the open
+ * tab's store if the conversation is already a tab; otherwise creates an
+ * EPHEMERAL watch store (separate from tabs — never opens a tab). Deltas are
+ * routed to it automatically. Pair every open with {@link unwatchConversation}
+ * on close to unsubscribe + dispose the ephemeral store.
+ */
+ watchConversation(conversationId: string): ChatStore;
+ /** Dispose + unsubscribe a watch opened by {@link watchConversation}. */
+ unwatchConversation(conversationId: string): void;
+ /**
+ * Load all configured per-provider concurrency limits
+ * (`GET /concurrency/limits`). Global (not workspace-scoped). Returns an empty
+ * list when the concurrency extension isn't loaded (`{ limits: [] }`).
+ */
+ concurrencyLimits(): Promise<ConcurrencyLimitsResult>;
+ /**
+ * Fetch the configured limit for one provider
+ * (`GET /concurrency/limits/:providerId`). `404` (no limit configured) and
+ * `503` (extension not loaded) both surface as `ok: false`.
+ */
+ getConcurrencyLimit(providerId: string): Promise<ConcurrencyLimitResult>;
+ /**
+ * Set or update a provider's concurrency limit
+ * (`PUT /concurrency/limits/:providerId`, body `{ limit }`). `limit` must be a
+ * positive integer (a non-positive body is `400`). At the cap, further requests
+ * queue oldest-agent-first rather than being sent immediately.
+ */
+ setConcurrencyLimit(providerId: string, limit: number): Promise<ConcurrencyLimitResult>;
+ /**
+ * Remove a provider's concurrency limit (`DELETE /concurrency/limits/:providerId`),
+ * making it unlimited. `404` (not configured) and `503` (extension not loaded)
+ * both surface as `ok: false`.
+ */
+ deleteConcurrencyLimit(providerId: string): Promise<ConcurrencyDeleteResult>;
+ /**
+ * Fetch live concurrency status for every provider with a configured limit
+ * (`GET /concurrency/status`): in-flight slots held, agents queued, and a paused
+ * state with a `pausedUntil` epoch-ms when a 429 backoff is in effect. Each
+ * entry also carries the per-slot release `cooldownMs` + an `autoReduced` flag
+ * (true when a 429 auto-reduced the limit by 1; the FE renders a banner). Returns
+ * an empty list when the extension isn't loaded (`{ providers: [] }`).
+ */
+ concurrencyStatus(): Promise<ConcurrencyStatusResult>;
+ /**
+ * Load Claude + Codex subscription usage (`GET /usage`). Served from the
+ * backend's cache (5 min TTL); `refresh: true` sends `?refresh=1`, which the
+ * server still rate-limits (min interval + failure cooldown). A 503 (the
+ * `account-usage` extension isn't loaded) returns `unavailable: true`.
+ */
+ accountUsage(opts?: { readonly refresh?: boolean }): Promise<AccountUsageResult>;
+ /**
+ * Update a provider's usage settings (`PUT /usage/:provider/settings`; today
+ * only `hyper`: `dailyAllowance` + `resetAnchor` epoch-ms or null). Returns
+ * the provider's refreshed report.
+ */
+ setAccountUsageSettings(
+ provider: AccountUsageProviderId,
+ settings: UpdateAccountUsageSettingsRequest,
+ ): Promise<AccountUsageSettingsResult>;
+ /**
+ * Load the GLOBAL search-backend selection
+ * (`GET /search/config`): which engine backs the `web_search` tool's search
+ * mode. Not workspace-scoped — the selection is global. `unavailable: true`
+ * on the failure variant marks the 503 degrade (the backend's
+ * search-config service not loaded) so the UI can disable the field.
+ */
+ searchBackendConfig(): Promise<SearchBackendConfigResult>;
+ /**
+ * Persist a new search-backend selection
+ * (`PUT /search/config`, body `{ backend }`). `400` (unknown/unconfigured
+ * backend) and `503` (service not loaded) both surface as `ok: false`.
+ */
+ setSearchBackend(backend: string): Promise<SearchBackendConfigResult>;
+ /**
+ * Fetch the per-slot release cooldown (ms) for one provider
+ * (`GET /concurrency/cooldown/:providerId`). `404` (no concurrency config at
+ * all) and `503` (extension not loaded) both surface as `ok: false`.
+ */
+ getConcurrencyCooldown(providerId: string): Promise<ConcurrencyCooldownResult>;
+ /**
+ * Set the per-slot release cooldown (ms) for one provider
+ * (`PUT /concurrency/cooldown/:providerId`, body `{ cooldownMs }`). `cooldownMs`
+ * must be a non-negative integer (0 = no cooldown / instant re-admission); an
+ * invalid body is `400`. Persists + applies to subsequently recycled slots.
+ */
+ setConcurrencyCooldown(
+ providerId: string,
+ cooldownMs: number,
+ ): Promise<ConcurrencyCooldownResult>;
+ /**
+ * A critical error that blocks normal operation (e.g. the cross-device tab
+ * restore fetch failed). When non-null, a full-screen modal is shown with the
+ * error details. Cleared by `clearFatalError` (the modal's dismiss button).
+ */
+ readonly fatalError: string | null;
+ /** Dismiss the fatal error (called by the error modal's X button). */
+ clearFatalError(): void;
+ // ── Named Agents (global config; plan §9) ──────────────────────────────────
+ /**
+ * The persisted Named Agents (from `GET /named-agents`). Global user config
+ * (not per-workspace); seeded on boot. Drives the sidebar editor AND the
+ * synthetic "Named Agents" provider in the model selector (plan §6).
+ */
+ readonly namedAgents: readonly NamedAgent[];
+ /**
+ * The active conversation's Named Agent selection snapshot (plan §7), or null
+ * when it was selected via a raw model. Survives the Named Agent being renamed
+ * / removed (the snapshot retains the friendly label + captured raw model).
+ */
+ readonly namedAgentSnapshot: NamedAgentSelectionSnapshot | null;
+ /** Refetch the Named Agents (`GET /named-agents`). */
+ refreshNamedAgents(): Promise<NamedAgentsResult>;
+ // ── Plugins (plan 07) ──────────────────────────────────────────────────────
+ /**
+ * The plugin manager + per-workspace enablement store (one instance per
+ * app store). The workspaces page's manager/modal read + mutate through
+ * it; the app store feeds its `onExtensionsChanged` hook.
+ */
+ readonly plugins: PluginsStore;
+ /**
+ * The ACTIVE workspace's tile tree (plan 02): served by the backend's
+ * layout provider when one is active, the local default otherwise. The
+ * shell reads `tree` for the renderer and feeds edits back through
+ * `onTreeChange` (debounced PUT + rollback); the store owns the probes,
+ * the WS-push filter, and the no-provider degrade.
+ */
+ readonly layout: LayoutStore;
+ /**
+ * The home grid's synced tile layout (ONE shared document per device
+ * orientation — `wide` = landscape/desktop, `tall` = portrait/mobile),
+ * served by the backend's home-tile-layout plugin. The home page locks the
+ * active orientation to the resolved grid geometry; this store owns the
+ * probes, the WS-push filter, the debounced PUT + rollback, and the
+ * offline degrade.
+ */
+ readonly tileLayout: TileLayoutStore;
+ /**
+ * Loaded provider-tier plugins effectively enabled in the ACTIVE workspace
+ * (`GET /workspaces/:id/plugins/providers-status`). `null` = unknown — the
+ * first-boot guardrail renders only on a confident `0` (§7).
+ */
+ readonly enabledProviderCount: number | null;
+ /**
+ * Create a Named Agent (`POST /named-agents`). On success the store's
+ * `namedAgents` list is updated (append/replace) so every consumer — the
+ * sidebar editor AND the model selector — reflects it without a reload.
+ */
+ createNamedAgent(input: NamedAgentInput): Promise<NamedAgentSaveResult>;
+ /**
+ * Update a Named Agent (`PUT /named-agents/:id`). On success the store list is
+ * updated in place. Returns the canonical saved record.
+ */
+ updateNamedAgent(id: string, input: NamedAgentInput): Promise<NamedAgentSaveResult>;
+ /**
+ * Remove a Named Agent (`DELETE /named-agents/:id`). On success it leaves the
+ * store list immediately (removing it from the sidebar + model selector), and
+ * does NOT alter conversations that previously selected it (those keep their
+ * snapshot — plan §7).
+ */
+ deleteNamedAgent(id: string): Promise<NamedAgentDeleteResult>;
+ dispose(): void;
+}
+
+export interface CreateAppStoreOptions {
+ url?: string;
+ httpUrl?: string;
+ socketFactory?: (url: string) => WebSocketLike;
+ fetchImpl?: typeof fetch;
+ indexedDB?: IDBFactory;
+ conversationId?: string;
+ localStorage?: Storage;
+ /** The workspace to scope to at boot (its URL slug); "default" if absent. */
+ workspaceId?: string;
+ /**
+ * How live chat events are batched before folding into a chat store.
+ * Default: once per animation frame (with a timeout fallback for hidden
+ * tabs). `null` = fold every event synchronously (tests that assert on the
+ * transcript immediately after feeding a frame).
+ */
+ chatFlushScheduler?: ((flush: () => void) => void) | null;
+}