@copilotkit/runtime

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CopilotKit/CopilotKit

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{"version":3,"file":"intelligence.cjs","names":["AgentRunner","Socket","Observable","AG_UI_CHANNEL_EVENT","EventType"],"sources":["../../../../src/v2/runtime/runner/intelligence.ts"],"sourcesContent":["import type {\n AgentRunnerConnectRequest,\n AgentRunnerIsRunningRequest,\n AgentRunnerRunRequest,\n} from \"./agent-runner\";\nimport { AgentRunner } from \"./agent-runner\";\nimport type { AgentRunnerStopRequest } from \"./agent-runner\";\nimport { Observable } from \"rxjs\";\nimport type { AbstractAgent, BaseEvent, RunStartedEvent } from \"@ag-ui/client\";\nimport { EventType } from \"@ag-ui/client\";\nimport {\n finalizeRunEvents,\n AG_UI_CHANNEL_EVENT,\n phoenixExponentialBackoff,\n} from \"@copilotkit/shared\";\nimport type { Channel } from \"phoenix\";\nimport { Socket } from \"phoenix\";\nimport { randomUUID } from \"node:crypto\";\n\nexport interface IntelligenceAgentRunnerOptions {\n /** Phoenix runner websocket URL, e.g. \"ws://localhost:4000/runner\" */\n url: string;\n /** Optional Phoenix socket auth token used during websocket connect. */\n authToken?: string;\n /** Max delay (ms) for WebSocket reconnect backoff. @default 10_000 */\n maxReconnectMs?: number;\n /** Max delay (ms) for channel rejoin backoff. @default 30_000 */\n maxRejoinMs?: number;\n}\n\nexport interface RunnerStartupBoundary {\n events: Observable<BaseEvent>;\n startup: Promise<void>;\n}\n\ninterface ThreadState {\n threadId: string;\n runId: string;\n socket: Socket;\n channel: Channel;\n isRunning: boolean;\n stopRequested: boolean;\n agent: AbstractAgent | null;\n currentEvents: BaseEvent[];\n nextEventSeq: number;\n hasRunStarted: boolean;\n hasJoined: boolean;\n supportsRunnerEventBatch: boolean;\n producerFinished: boolean;\n pendingEvents: Map<\n string,\n { payload: Record<string, unknown>; queuedAt: number }\n >;\n activeEventBatch: { eventIds: string[]; attempt: number } | null;\n nextEventPushAttempt: number;\n eventRetryTimer: ReturnType<typeof setTimeout> | null;\n eventFlushTimer: ReturnType<typeof setTimeout> | null;\n eventDeadlineTimer: ReturnType<typeof setTimeout> | null;\n socketReconnectWatchdog: ReturnType<typeof setTimeout> | null;\n eventRetryAttempt: number;\n completeRun: () => void;\n failRun: (error: Error) => void;\n}\n\nconst MAX_CONSECUTIVE_SOCKET_ERRORS = 5;\nconst EVENT_RETRY_BASE_MS = 100;\nconst EVENT_RETRY_MAX_MS = 2_000;\nconst RUNNER_EVENT_BATCH_CAPABILITY = \"runner_event_batch_v1\";\nconst MAX_RUNNER_EVENT_BATCH_SIZE = 32;\nconst RUNNER_EVENT_BATCH_FLUSH_MS = 5;\nconst EVENT_DURABILITY_DEADLINE_MS = 60_000;\n\nexport class IntelligenceAgentRunner extends AgentRunner {\n private options: IntelligenceAgentRunnerOptions;\n private threads = new Map<string, ThreadState>();\n\n constructor(options: IntelligenceAgentRunnerOptions) {\n super();\n // Store config — sockets are created per-run, not eagerly.\n this.options = options;\n }\n\n /**\n * Create a new Phoenix socket with explicit exponential backoff.\n *\n * Each run/connect gets its own socket so that:\n * - A socket failure only affects a single thread, not all threads.\n * - Cleanup is simple: channel.leave() + socket.disconnect() tears\n * down everything for that run with no shared-state concerns.\n * - Each run gets its own independent retry budget.\n *\n * reconnectAfterMs — delay before Phoenix reconnects the WebSocket\n * after an unclean close. 100ms base, doubling up to maxReconnectMs (default 10s).\n *\n * rejoinAfterMs — delay before Phoenix re-joins a channel that\n * entered the \"errored\" state. 1s base, doubling up to maxRejoinMs (default 30s).\n *\n * These are set explicitly because Phoenix's default schedule is a\n * fixed stepped array (not exponential), and any code that calls\n * socket.disconnect() in an onError handler will set\n * closeWasClean = true and reset the reconnect timer — permanently\n * killing retries.\n */\n private createSocket(authToken = this.options.authToken): Socket {\n const socket = new Socket(this.options.url, {\n ...(authToken ? { authToken } : {}),\n reconnectAfterMs: phoenixExponentialBackoff(\n 100,\n this.options.maxReconnectMs ?? 10_000,\n ),\n rejoinAfterMs: phoenixExponentialBackoff(\n 1_000,\n this.options.maxRejoinMs ?? 30_000,\n ),\n });\n socket.connect();\n return socket;\n }\n\n private createRunnerEventPayload(\n event: BaseEvent,\n request: AgentRunnerRunRequest,\n state: ThreadState,\n ): Record<string, unknown> {\n const canonicalEvent = this.stampRunnerMetadata(\n this.stampCanonicalRunOwnership(event, request),\n state,\n );\n const payload = {\n ...(canonicalEvent as Record<string, unknown>),\n };\n\n payload.threadId = request.threadId;\n payload.runId = request.input.runId;\n payload.thread_id = request.threadId;\n payload.run_id = request.input.runId;\n\n return payload;\n }\n\n private stampCanonicalRunOwnership(\n event: BaseEvent,\n request: AgentRunnerRunRequest,\n ): BaseEvent {\n const eventRecord = event as BaseEvent & Record<string, unknown>;\n eventRecord.threadId = request.threadId;\n eventRecord.runId = request.input.runId;\n return eventRecord;\n }\n\n private stampRunnerMetadata(event: BaseEvent, state: ThreadState): BaseEvent {\n const eventRecord = event as BaseEvent & {\n metadata?: Record<string, unknown>;\n };\n\n const existingMetadata = eventRecord.metadata ?? {};\n const hasEventId = typeof existingMetadata.cpki_event_id === \"string\";\n const hasEventSeq = typeof existingMetadata.cpki_event_seq === \"number\";\n\n if (hasEventId && hasEventSeq) {\n const eventSeq = existingMetadata.cpki_event_seq as number;\n state.nextEventSeq = Math.max(state.nextEventSeq, eventSeq + 1);\n return eventRecord;\n }\n\n const eventSeq = state.nextEventSeq++;\n\n eventRecord.metadata = {\n ...existingMetadata,\n cpki_event_id:\n typeof existingMetadata.cpki_event_id === \"string\"\n ? existingMetadata.cpki_event_id\n : randomUUID(),\n cpki_event_seq: eventSeq,\n };\n return eventRecord;\n }\n\n run(request: AgentRunnerRunRequest): Observable<BaseEvent> {\n return this.createRunObservable(request);\n }\n\n runWithStartupBoundary(\n request: AgentRunnerRunRequest,\n ): RunnerStartupBoundary {\n let resolveStartup: (() => void) | undefined;\n let rejectStartup: ((reason: Error) => void) | undefined;\n const startup = new Promise<void>((resolve, reject) => {\n resolveStartup = resolve;\n rejectStartup = reject;\n });\n\n return {\n events: this.createRunObservable(request, {\n resolveStartup: () => resolveStartup?.(),\n rejectStartup: (error) => rejectStartup?.(error),\n }),\n startup,\n };\n }\n\n private createRunObservable(\n request: AgentRunnerRunRequest,\n startupBoundary?: {\n resolveStartup: () => void;\n rejectStartup: (error: Error) => void;\n },\n ): Observable<BaseEvent> {\n const { threadId, agent, input } = request;\n\n const existing = this.threads.get(threadId);\n if (existing?.isRunning) {\n throw new Error(\"Thread already running\");\n }\n\n return new Observable((observer) => {\n if (this.threads.get(threadId)?.isRunning) {\n observer.error(new Error(\"Thread already running\"));\n return;\n }\n\n const socket = this.createSocket(request.authToken);\n\n const channel = socket.channel(`ingestion:${input.runId}`, {\n thread_id: threadId,\n run_id: input.runId,\n });\n\n const state: ThreadState = {\n threadId,\n runId: input.runId,\n socket,\n channel,\n isRunning: true,\n stopRequested: false,\n agent,\n currentEvents: [],\n nextEventSeq: 1,\n hasRunStarted: false,\n hasJoined: false,\n supportsRunnerEventBatch: false,\n producerFinished: false,\n pendingEvents: new Map(),\n activeEventBatch: null,\n nextEventPushAttempt: 0,\n eventRetryTimer: null,\n eventFlushTimer: null,\n eventDeadlineTimer: null,\n socketReconnectWatchdog: null,\n eventRetryAttempt: 0,\n completeRun: () => observer.complete(),\n failRun: (error) => observer.error(error),\n };\n this.threads.set(threadId, state);\n\n let consecutiveSocketErrors = 0;\n let plannedRestart = false;\n\n socket.onClose((event) => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n plannedRestart = plannedRestart || event?.code === 1012;\n if (event?.code !== 1000 && state.socketReconnectWatchdog === null) {\n state.socketReconnectWatchdog = setTimeout(() => {\n state.socketReconnectWatchdog = null;\n if (!state.isRunning || socket.isConnected()) {\n return;\n }\n socket.disconnect(() => {\n if (state.isRunning && !socket.isConnected()) {\n socket.connect();\n }\n });\n }, 1_000);\n }\n });\n socket.onOpen(() => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n if (state.socketReconnectWatchdog !== null) {\n clearTimeout(state.socketReconnectWatchdog);\n state.socketReconnectWatchdog = null;\n }\n consecutiveSocketErrors = 0;\n plannedRestart = false;\n });\n socket.onError(() => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n // Once the gateway has accepted the run, transport recovery is not a\n // terminal condition. The agent may still be producing the\n // authoritative answer while Phoenix reconnects and replays durable\n // events, so an arbitrary socket-error count must not abort it.\n if (plannedRestart || state.hasJoined) {\n return;\n }\n\n consecutiveSocketErrors += 1;\n if (consecutiveSocketErrors >= MAX_CONSECUTIVE_SOCKET_ERRORS) {\n state.agent?.abortRun();\n }\n });\n\n // Listen for custom \"stop\" events pushed by the client over the\n // channel. This must be registered before channel.join() so the\n // handler is in place by the time the server starts relaying messages.\n // The client sends the stop event before leaving the channel, so the\n // runner is guaranteed to receive it while still joined.\n channel.on(AG_UI_CHANNEL_EVENT, (payload: BaseEvent) => {\n if (\n this.isCurrentThreadState(threadId, state) &&\n payload.type === EventType.CUSTOM &&\n (payload as BaseEvent & { name?: string }).name === \"stop\"\n ) {\n this.stop({ threadId, runId: state.runId });\n }\n });\n\n channel\n .join()\n .receive(\"ok\", (response) => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n const supportsRunnerEventBatch =\n this.supportsRunnerEventBatch(response);\n const activeEventBatch =\n state.supportsRunnerEventBatch === supportsRunnerEventBatch\n ? state.activeEventBatch\n : null;\n state.supportsRunnerEventBatch = supportsRunnerEventBatch;\n if (state.hasJoined) {\n this.resetPendingEventRetry(state);\n if (activeEventBatch !== null) {\n state.activeEventBatch = activeEventBatch;\n this.retryActiveEventBatch(state);\n } else {\n this.replayPendingEvents(state);\n }\n return;\n }\n\n state.hasJoined = true;\n startupBoundary?.resolveStartup();\n void this.executeAgentRun(request, state, threadId, (event) => {\n observer.next(event);\n });\n })\n .receive(\"error\", (resp) => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n if (state.hasJoined) {\n if (this.isPermanentEventFailure(resp)) {\n const reason =\n typeof (resp as { reason?: unknown }).reason === \"string\"\n ? `: ${(resp as { reason: string }).reason}`\n : \"\";\n this.failThread(\n threadId,\n state,\n new Error(\n `Gateway permanently rejected channel rejoin${reason}`,\n ),\n );\n }\n return;\n }\n if (this.isRetryableJoinError(resp)) {\n return;\n }\n\n const error = new Error(\n `Failed to join channel: ${JSON.stringify(resp)}`,\n );\n const errorEvent = {\n type: EventType.RUN_ERROR,\n message: error.message,\n code: \"CHANNEL_JOIN_ERROR\",\n } as BaseEvent;\n observer.next(errorEvent);\n state.currentEvents.push(errorEvent);\n this.removeThread(threadId, state);\n startupBoundary?.rejectStartup(error);\n observer.complete();\n })\n .receive(\"timeout\", () => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n if (state.hasJoined) {\n return;\n }\n\n const error = new Error(\"Timed out joining channel\");\n const errorEvent = {\n type: EventType.RUN_ERROR,\n message: error.message,\n code: \"CHANNEL_JOIN_TIMEOUT\",\n } as BaseEvent;\n observer.next(errorEvent);\n state.currentEvents.push(errorEvent);\n this.removeThread(threadId, state);\n startupBoundary?.rejectStartup(error);\n observer.complete();\n });\n\n return () => {\n this.removeThread(threadId, state);\n };\n });\n }\n\n connect(request: AgentRunnerConnectRequest): Observable<BaseEvent> {\n const { threadId } = request;\n\n return new Observable((observer) => {\n const socket = this.createSocket();\n\n const channel = socket.channel(`thread:${threadId}`);\n\n channel.on(\"ag_ui_event\", (payload: BaseEvent) => {\n observer.next(payload);\n\n if (\n payload.type === EventType.RUN_FINISHED ||\n payload.type === EventType.RUN_ERROR\n ) {\n observer.complete();\n }\n });\n\n const cleanup = () => {\n channel.leave();\n socket.disconnect();\n };\n\n channel\n .join()\n .receive(\"ok\", () => undefined)\n .receive(\"error\", (resp) => {\n observer.error(\n new Error(`Failed to join channel: ${JSON.stringify(resp)}`),\n );\n cleanup();\n })\n .receive(\"timeout\", () => {\n observer.error(new Error(\"Timed out joining channel\"));\n cleanup();\n });\n\n return () => {\n cleanup();\n };\n });\n }\n\n isRunning(request: AgentRunnerIsRunningRequest): Promise<boolean> {\n const state = this.threads.get(request.threadId);\n return Promise.resolve(state?.isRunning ?? false);\n }\n\n stop(request: AgentRunnerStopRequest): Promise<boolean | undefined> {\n const state = this.threads.get(request.threadId);\n if (!state || !state.isRunning || state.stopRequested) {\n return Promise.resolve(false);\n }\n if (request.runId !== undefined && state.runId !== request.runId) {\n return Promise.resolve(false);\n }\n\n state.stopRequested = true;\n\n // Direct local abort — the runtime is the authority.\n if (state.agent) {\n try {\n state.agent.abortRun();\n } catch {\n // Ignore abort errors.\n }\n }\n\n return Promise.resolve(true);\n }\n\n private async executeAgentRun(\n request: AgentRunnerRunRequest,\n state: ThreadState,\n threadId: string,\n onRunError: (event: BaseEvent) => void,\n ): Promise<void> {\n const { currentEvents } = state;\n const pushCanonicalEvent = (event: BaseEvent): void => {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n const canonicalEvent = this.stampRunnerMetadata(\n this.stampCanonicalRunOwnership(event, request),\n state,\n );\n currentEvents.push(canonicalEvent);\n\n if (canonicalEvent.type === EventType.RUN_STARTED) {\n state.hasRunStarted = true;\n }\n\n this.queueRunnerEvent(\n this.createRunnerEventPayload(canonicalEvent, request, state),\n state,\n );\n };\n\n const getPersistedInputMessages = () =>\n request.persistedInputMessages ?? request.input.messages;\n\n const buildRunStartedEvent = (\n source?: RunStartedEvent,\n ): RunStartedEvent => {\n const baseInput = source?.input ?? request.input;\n const persistedInputMessages = getPersistedInputMessages();\n const event =\n source ??\n ({\n type: EventType.RUN_STARTED,\n threadId: request.threadId,\n runId: request.input.runId,\n } as RunStartedEvent);\n event.threadId = request.threadId;\n event.runId = request.input.runId;\n event.input = {\n ...baseInput,\n threadId: request.threadId,\n runId: request.input.runId,\n ...(persistedInputMessages !== undefined\n ? { messages: persistedInputMessages }\n : {}),\n };\n return event;\n };\n\n const ensureRunStarted = (): void => {\n if (!state.hasRunStarted) {\n state.hasRunStarted = true;\n pushCanonicalEvent(buildRunStartedEvent());\n }\n };\n\n try {\n await request.agent.runAgent(request.input, {\n onEvent: ({ event }: { event: BaseEvent }) => {\n if (event.type === EventType.RUN_STARTED) {\n pushCanonicalEvent(buildRunStartedEvent(event as RunStartedEvent));\n return;\n }\n\n ensureRunStarted();\n pushCanonicalEvent(event);\n },\n });\n } catch (error) {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n ensureRunStarted();\n const existingError = currentEvents.find(\n (event) => event.type === EventType.RUN_ERROR,\n );\n if (existingError) {\n onRunError(existingError);\n } else {\n const errorEvent = {\n type: EventType.RUN_ERROR,\n message: error instanceof Error ? error.message : String(error),\n } as BaseEvent;\n pushCanonicalEvent(errorEvent);\n onRunError(errorEvent);\n }\n } finally {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n ensureRunStarted();\n const appended = finalizeRunEvents(currentEvents, {\n stopRequested: state.stopRequested,\n });\n for (const event of appended) {\n const canonicalEvent = this.stampRunnerMetadata(\n this.stampCanonicalRunOwnership(event, request),\n state,\n );\n this.queueRunnerEvent(\n this.createRunnerEventPayload(canonicalEvent, request, state),\n state,\n );\n }\n state.producerFinished = true;\n this.completeWhenDurable(threadId, state);\n }\n }\n\n /** Queue one immutable event payload until Redis-backed gateway acknowledgement. */\n private queueRunnerEvent(\n payload: Record<string, unknown>,\n state: ThreadState,\n ): void {\n if (!this.isCurrentThreadState(state.threadId, state)) {\n return;\n }\n const eventId = this.runnerEventId(payload);\n if (!state.pendingEvents.has(eventId)) {\n state.pendingEvents.set(eventId, {\n payload: structuredClone(payload),\n queuedAt: Date.now(),\n });\n }\n this.scheduleEventDeadline(state);\n this.replayPendingEvents(state);\n }\n\n private pushPendingEventBatch(\n eventIds: string[],\n events: Array<{ payload: Record<string, unknown>; queuedAt: number }>,\n state: ThreadState,\n ): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n this.failIfEventDeadlineExceeded(state) ||\n state.channel.state !== \"joined\" ||\n !state.socket.isConnected()\n ) {\n return;\n }\n\n const attempt = ++state.nextEventPushAttempt;\n state.activeEventBatch = { eventIds, attempt };\n const payloads = events.map((event) => event.payload);\n const isBatch = state.supportsRunnerEventBatch;\n\n state.channel\n .push(\n isBatch ? \"events\" : \"event\",\n isBatch ? { events: payloads } : payloads[0],\n )\n .receive(\"ok\", () => {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.activeEventBatch?.attempt !== attempt\n ) {\n return;\n }\n if (this.failIfEventDeadlineExceeded(state)) {\n return;\n }\n for (const eventId of eventIds) {\n state.pendingEvents.delete(eventId);\n }\n state.activeEventBatch = null;\n state.eventRetryAttempt = 0;\n if (state.pendingEvents.size === 0) {\n this.clearPendingEventRetry(state);\n this.clearPendingEventFlush(state);\n }\n this.scheduleEventDeadline(state);\n this.completeWhenDurable(state.threadId, state);\n this.replayPendingEvents(state);\n })\n .receive(\"error\", (response) =>\n this.handlePendingEventFailure(state, attempt, response),\n )\n .receive(\"timeout\", () => this.handlePendingEventFailure(state, attempt));\n }\n\n private handlePendingEventFailure(\n state: ThreadState,\n attempt: number,\n response?: unknown,\n ): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.activeEventBatch?.attempt !== attempt\n ) {\n return;\n }\n\n if (this.failIfEventDeadlineExceeded(state)) {\n return;\n }\n if (this.isPermanentEventFailure(response)) {\n const reason =\n typeof response === \"object\" &&\n response !== null &&\n typeof (response as { reason?: unknown }).reason === \"string\"\n ? (response as { reason: string }).reason\n : \"permanent_gateway_rejection\";\n this.failThread(\n state.threadId,\n state,\n new Error(`Runner event durability failed: ${reason}`),\n );\n return;\n }\n this.schedulePendingEventRetry(state);\n }\n\n private schedulePendingEventRetry(state: ThreadState): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.pendingEvents.size === 0 ||\n state.eventRetryTimer !== null\n ) {\n return;\n }\n\n const delay = Math.min(\n EVENT_RETRY_BASE_MS * 2 ** state.eventRetryAttempt,\n EVENT_RETRY_MAX_MS,\n );\n state.eventRetryAttempt += 1;\n state.eventRetryTimer = setTimeout(() => {\n state.eventRetryTimer = null;\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.pendingEvents.size === 0\n ) {\n return;\n }\n this.retryActiveEventBatch(state);\n }, delay);\n }\n\n private clearPendingEventRetry(state: ThreadState): void {\n if (state.eventRetryTimer !== null) {\n clearTimeout(state.eventRetryTimer);\n state.eventRetryTimer = null;\n }\n }\n\n private schedulePendingEventFlush(state: ThreadState): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.pendingEvents.size === 0 ||\n state.activeEventBatch !== null ||\n state.eventFlushTimer !== null\n ) {\n return;\n }\n\n const oldestQueuedAt = Math.min(\n ...[...state.pendingEvents.values()].map((event) => event.queuedAt),\n );\n const delay = Math.max(\n 0,\n oldestQueuedAt + RUNNER_EVENT_BATCH_FLUSH_MS - Date.now(),\n );\n state.eventFlushTimer = setTimeout(() => {\n state.eventFlushTimer = null;\n if (!this.isCurrentThreadState(state.threadId, state)) {\n return;\n }\n this.flushPendingEventBatch(state);\n }, delay);\n }\n\n private clearPendingEventFlush(state: ThreadState): void {\n if (state.eventFlushTimer !== null) {\n clearTimeout(state.eventFlushTimer);\n state.eventFlushTimer = null;\n }\n }\n\n private resetPendingEventRetry(state: ThreadState): void {\n this.clearPendingEventRetry(state);\n this.clearPendingEventFlush(state);\n state.eventRetryAttempt = 0;\n state.activeEventBatch = null;\n }\n\n private replayPendingEvents(state: ThreadState): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.activeEventBatch !== null\n ) {\n return;\n }\n\n const pendingEvents = [...state.pendingEvents.entries()].sort(\n ([, left], [, right]) =>\n this.runnerEventSeq(left.payload) - this.runnerEventSeq(right.payload),\n );\n if (pendingEvents.length === 0) {\n return;\n }\n\n const batchSize = state.supportsRunnerEventBatch\n ? MAX_RUNNER_EVENT_BATCH_SIZE\n : 1;\n if (!state.supportsRunnerEventBatch || pendingEvents.length >= batchSize) {\n this.clearPendingEventFlush(state);\n const batch = pendingEvents.slice(0, batchSize);\n this.pushPendingEventBatch(\n batch.map(([eventId]) => eventId),\n batch.map(([, event]) => event),\n state,\n );\n return;\n }\n\n this.schedulePendingEventFlush(state);\n }\n\n private flushPendingEventBatch(state: ThreadState): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.activeEventBatch !== null ||\n state.pendingEvents.size === 0\n ) {\n return;\n }\n\n const batch = [...state.pendingEvents.entries()]\n .sort(\n ([, left], [, right]) =>\n this.runnerEventSeq(left.payload) -\n this.runnerEventSeq(right.payload),\n )\n .slice(0, MAX_RUNNER_EVENT_BATCH_SIZE);\n this.pushPendingEventBatch(\n batch.map(([eventId]) => eventId),\n batch.map(([, event]) => event),\n state,\n );\n }\n\n private retryActiveEventBatch(state: ThreadState): void {\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n this.failIfEventDeadlineExceeded(state)\n ) {\n return;\n }\n const activeBatch = state.activeEventBatch;\n if (activeBatch === null) {\n this.replayPendingEvents(state);\n return;\n }\n\n const events = activeBatch.eventIds\n .map((eventId) => state.pendingEvents.get(eventId))\n .filter(\n (\n event,\n ): event is { payload: Record<string, unknown>; queuedAt: number } =>\n event !== undefined,\n );\n if (events.length !== activeBatch.eventIds.length) {\n state.activeEventBatch = null;\n this.replayPendingEvents(state);\n return;\n }\n\n this.pushPendingEventBatch(activeBatch.eventIds, events, state);\n }\n\n private completeWhenDurable(threadId: string, state: ThreadState): void {\n if (\n !this.isCurrentThreadState(threadId, state) ||\n !state.producerFinished ||\n state.pendingEvents.size !== 0\n ) {\n return;\n }\n if (this.threads.get(threadId) !== state) {\n return;\n }\n\n this.removeThread(threadId, state);\n state.completeRun();\n }\n\n private runnerEventId(payload: Record<string, unknown>): string {\n const metadata = payload.metadata as Record<string, unknown>;\n return metadata.cpki_event_id as string;\n }\n\n private runnerEventSeq(payload: Record<string, unknown>): number {\n const metadata = payload.metadata as Record<string, unknown>;\n return metadata.cpki_event_seq as number;\n }\n\n private supportsRunnerEventBatch(response: unknown): boolean {\n if (typeof response !== \"object\" || response === null) {\n return false;\n }\n const capabilities = (response as { capabilities?: unknown }).capabilities;\n return (\n Array.isArray(capabilities) &&\n capabilities.includes(RUNNER_EVENT_BATCH_CAPABILITY)\n );\n }\n\n private isRetryableJoinError(response: unknown): boolean {\n if (typeof response !== \"object\" || response === null) {\n return false;\n }\n const value = response as { reason?: unknown; retryable?: unknown };\n if (value.retryable === false) {\n return false;\n }\n return value.retryable === true || value.reason === \"gateway_draining\";\n }\n\n private isPermanentEventFailure(response: unknown): boolean {\n return (\n typeof response === \"object\" &&\n response !== null &&\n (response as { retryable?: unknown }).retryable === false\n );\n }\n\n private scheduleEventDeadline(state: ThreadState): void {\n if (state.eventDeadlineTimer !== null) {\n clearTimeout(state.eventDeadlineTimer);\n state.eventDeadlineTimer = null;\n }\n if (\n !this.isCurrentThreadState(state.threadId, state) ||\n state.pendingEvents.size === 0\n ) {\n return;\n }\n\n const oldestQueuedAt = Math.min(\n ...[...state.pendingEvents.values()].map((event) => event.queuedAt),\n );\n const deadline = oldestQueuedAt + EVENT_DURABILITY_DEADLINE_MS;\n state.eventDeadlineTimer = setTimeout(\n () => {\n state.eventDeadlineTimer = null;\n if (!this.isCurrentThreadState(state.threadId, state)) {\n return;\n }\n\n if (!this.failIfEventDeadlineExceeded(state)) {\n this.scheduleEventDeadline(state);\n }\n },\n Math.max(0, deadline - Date.now()),\n );\n }\n\n private failThread(threadId: string, state: ThreadState, error: Error): void {\n if (!this.isCurrentThreadState(threadId, state)) {\n return;\n }\n this.removeThread(threadId, state);\n try {\n state.agent?.abortRun();\n } catch {\n // The terminal durability error must still reach the subscriber.\n }\n state.failRun(error);\n }\n\n private failIfEventDeadlineExceeded(state: ThreadState): boolean {\n if (state.pendingEvents.size === 0) {\n return false;\n }\n const oldestQueuedAt = Math.min(\n ...[...state.pendingEvents.values()].map((event) => event.queuedAt),\n );\n if (Date.now() < oldestQueuedAt + EVENT_DURABILITY_DEADLINE_MS) {\n return false;\n }\n this.failThread(\n state.threadId,\n state,\n new Error(\"Timed out trying to durably deliver runner events\"),\n );\n return true;\n }\n\n private isCurrentThreadState(threadId: string, state: ThreadState): boolean {\n return state.isRunning 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catch {\n // Channel may already be closed/left.\n }\n try {\n state.socket.disconnect();\n } catch {\n // Socket may already be disconnected.\n }\n 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