import {
type ChatAttachment,
CommandId,
EventId,
type ModelSelection,
type OrchestrationEvent,
ProviderDriverKind,
type ProjectId,
type OrchestrationSession,
ThreadId,
type ProviderSession,
type RuntimeMode,
type TurnId,
} from "@t3tools/contracts";
import { assistantCitationsToPlainText } from "@t3tools/shared/assistantCitations";
import { isTemporaryWorktreeBranch, WORKTREE_BRANCH_PREFIX } from "@t3tools/shared/git";
import * as Cache from "effect/Cache";
import * as Cause from "effect/Cause";
import * as Crypto from "effect/Crypto";
import * as Duration from "effect/Duration";
import * as Effect from "effect/Effect";
import * as Equal from "effect/Equal";
import * as FileSystem from "effect/FileSystem";
import * as Layer from "effect/Layer";
import * as Option from "effect/Option";
import * as Schedule from "effect/Schedule";
import * as Schema from "effect/Schema";
import * as Stream from "effect/Stream";
import { makeDrainableWorker } from "@t3tools/shared/DrainableWorker";
import { resolveThreadWorkspaceCwd } from "../../checkpointing/Utils.ts";
import { increment, orchestrationEventsProcessedTotal } from "../../observability/Metrics.ts";
import { ProviderAdapterRequestError } from "../../provider/Errors.ts";
import type { ProviderServiceError } from "../../provider/Errors.ts";
import { TextGeneration } from "../../textGeneration/TextGeneration.ts";
import { ProviderAuthService } from "../../provider/Services/ProviderAuthService.ts";
import { ProviderService } from "../../provider/Services/ProviderService.ts";
import { ProviderRegistry } from "../../provider/Services/ProviderRegistry.ts";
import { OrchestrationEngineService } from "../Services/OrchestrationEngine.ts";
import { ProjectionSnapshotQuery } from "../Services/ProjectionSnapshotQuery.ts";
import {
ProviderCommandReactor,
type ProviderCommandReactorShape,
} from "../Services/ProviderCommandReactor.ts";
import { forkParked, ServerActivation } from "../../serverActivation.ts";
import { canReplaceThreadTitle, DEFAULT_THREAD_TITLE } from "../threadTitles.ts";
import {
resolveSourceControlWriterModelSelection,
ServerSettingsService,
} from "../../serverSettings.ts";
import { VcsStatusBroadcaster } from "../../vcs/VcsStatusBroadcaster.ts";
import { GitWorkflowService } from "../../git/GitWorkflowService.ts";
const isProviderAdapterRequestError = Schema.is(ProviderAdapterRequestError);
const isProviderDriverKind = Schema.is(ProviderDriverKind);
type ProviderIntentEvent = Extract<
OrchestrationEvent,
{
type:
| "thread.meta-updated"
| "thread.runtime-mode-set"
| "thread.turn-start-requested"
| "thread.turn-interrupt-requested"
| "thread.approval-response-requested"
| "thread.user-input-response-requested"
| "thread.session-stop-requested"
| "thread.settled";
}
>;
function toNonEmptyProviderInput(value: string | undefined): string | undefined {
const normalized = value?.trim();
return normalized && normalized.length > 0 ? normalized : undefined;
}
function mapProviderSessionStatusToOrchestrationStatus(
status: "connecting" | "ready" | "running" | "error" | "closed",
): OrchestrationSession["status"] {
switch (status) {
case "connecting":
return "starting";
case "running":
return "running";
case "error":
return "error";
case "closed":
return "stopped";
case "ready":
default:
return "ready";
}
}
const turnStartKeyForEvent = (event: ProviderIntentEvent): string =>
event.commandId !== null ? `command:${event.commandId}` : `event:${event.eventId}`;
const HANDLED_TURN_START_KEY_MAX = 10_000;
const HANDLED_TURN_START_KEY_TTL = Duration.minutes(30);
const DEFAULT_RUNTIME_MODE: RuntimeMode = "full-access";
const MAX_REGENERATION_ATTACHMENTS = 4;
const MAX_THREAD_TITLE_CONTEXT_CHARS = 8_000;
const MAX_FIRST_USER_TITLE_CONTEXT_CHARS = 2_000;
const THREAD_TITLE_CONTEXT_TRUNCATION_MARKER = "[Earlier content truncated]\n\n";
const FIRST_USER_CONTEXT_TRUNCATION_MARKER = "\n[First user message truncated]";
type ThreadTitleMessage = {
readonly role: "user" | "assistant" | "system";
readonly text: string;
readonly attachments?: ReadonlyArray<ChatAttachment> | undefined;
};
function formatThreadTitleSection(message: ThreadTitleMessage): string | undefined {
if (message.role === "system") {
return undefined;
}
const text = assistantCitationsToPlainText(message.text).trim();
const attachmentSummary = (message.attachments ?? [])
.map((attachment) => attachment.name)
.join(", ");
const contents = [
...(text.length > 0 ? [text] : []),
...(attachmentSummary.length > 0 ? [`[Attachments: ${attachmentSummary}]`] : []),
].join("\n");
return contents.length > 0 ? `${message.role.toUpperCase()}:\n${contents}` : undefined;
}
function limitFirstUserSection(section: string): string {
if (section.length <= MAX_FIRST_USER_TITLE_CONTEXT_CHARS) {
return section;
}
return `${section.slice(
0,
MAX_FIRST_USER_TITLE_CONTEXT_CHARS - FIRST_USER_CONTEXT_TRUNCATION_MARKER.length,
)}${FIRST_USER_CONTEXT_TRUNCATION_MARKER}`;
}
function collectRecentThreadTitleContext(
messages: ReadonlyArray<ThreadTitleMessage>,
maxChars: number,
): {
readonly context: string;
readonly attachments: ReadonlyArray<ChatAttachment>;
readonly truncated: boolean;
} {
let context = "";
let truncated = false;
const retainedAttachments: Array<ChatAttachment> = [];
for (const message of messages.toReversed()) {
const section = formatThreadTitleSection(message);
if (section === undefined) {
continue;
}
const separator = context.length > 0 ? "\n\n" : "";
const available = maxChars - context.length - separator.length;
if (section.length > available) {
if (available > 0) {
context = `${section.slice(-available)}${separator}${context}`;
retainedAttachments.unshift(...(message.attachments ?? []));
}
truncated = true;
break;
}
context = `${section}${separator}${context}`;
retainedAttachments.unshift(...(message.attachments ?? []));
}
return { context, attachments: retainedAttachments, truncated };
}
function formatThreadTitleContext(messages: ReadonlyArray<ThreadTitleMessage>): {
readonly message: string;
readonly attachments: ReadonlyArray<ChatAttachment>;
} {
const recent = collectRecentThreadTitleContext(messages, MAX_THREAD_TITLE_CONTEXT_CHARS);
if (!recent.truncated) {
return {
message: recent.context,
attachments: recent.attachments.slice(-MAX_REGENERATION_ATTACHMENTS),
};
}
const firstUserMessage = messages.find(
(message) => message.role === "user" && formatThreadTitleSection(message),
);
const firstUserSection = firstUserMessage
? formatThreadTitleSection(firstUserMessage)
: undefined;
if (!firstUserMessage || !firstUserSection) {
return {
message: `${THREAD_TITLE_CONTEXT_TRUNCATION_MARKER}${recent.context}`,
attachments: recent.attachments.slice(-MAX_REGENERATION_ATTACHMENTS),
};
}
const pinnedSection = limitFirstUserSection(firstUserSection);
const recentContextBudget =
MAX_THREAD_TITLE_CONTEXT_CHARS -
pinnedSection.length -
"\n\n".length -
THREAD_TITLE_CONTEXT_TRUNCATION_MARKER.length;
const retainedRecent = collectRecentThreadTitleContext(messages, recentContextBudget);
const pinnedAttachment = firstUserMessage.attachments?.[0];
const recentAttachments = retainedRecent.attachments.filter(
(attachment) => attachment.id !== pinnedAttachment?.id,
);
return {
message: `${pinnedSection}\n\n${THREAD_TITLE_CONTEXT_TRUNCATION_MARKER}${retainedRecent.context}`,
attachments: [
...(pinnedAttachment ? [pinnedAttachment] : []),
...recentAttachments.slice(
-(MAX_REGENERATION_ATTACHMENTS - (pinnedAttachment === undefined ? 0 : 1)),
),
],
};
}
export function providerErrorLabel(value: string | undefined): string {
const normalized = value?.trim();
return normalized && normalized.length > 0 ? normalized : "unknown";
}
export function providerErrorLabelFromInstanceHint(input: {
readonly instanceId?: string | undefined;
readonly modelSelectionInstanceId?: string | undefined;
readonly sessionProvider?: string | undefined;
}): string {
return providerErrorLabel(
input.instanceId ?? input.modelSelectionInstanceId ?? input.sessionProvider,
);
}
function findProviderAdapterRequestError(
cause: Cause.Cause<ProviderServiceError>,
): ProviderAdapterRequestError | undefined {
const failReason = cause.reasons.find(Cause.isFailReason);
return isProviderAdapterRequestError(failReason?.error) ? failReason.error : undefined;
}
function isUnknownPendingApprovalRequestError(cause: Cause.Cause<ProviderServiceError>): boolean {
const error = findProviderAdapterRequestError(cause);
if (error) {
const detail = error.detail.toLowerCase();
return (
detail.includes("unknown pending approval request") ||
detail.includes("unknown pending permission request") ||
detail.includes("unknown pending codex approval request")
);
}
const message = Cause.pretty(cause).toLowerCase();
return (
message.includes("unknown pending approval request") ||
message.includes("unknown pending permission request") ||
message.includes("unknown pending codex approval request")
);
}
function isUnknownPendingUserInputRequestError(cause: Cause.Cause<ProviderServiceError>): boolean {
const error = findProviderAdapterRequestError(cause);
if (error) {
const detail = error.detail.toLowerCase();
return (
detail.includes("unknown pending user-input request") ||
detail.includes("unknown pending user input request") ||
detail.includes("unknown pending codex user input request")
);
}
const message = Cause.pretty(cause).toLowerCase();
return (
message.includes("unknown pending user-input request") ||
message.includes("unknown pending user input request") ||
message.includes("unknown pending codex user input request")
);
}
function stalePendingRequestDetail(
requestKind: "approval" | "user-input",
requestId: string,
): string {
return `Stale pending ${requestKind} request: ${requestId}. Provider callback state does not survive app restarts or recovered sessions. Restart the turn to continue.`;
}
function buildGeneratedWorktreeBranchName(raw: string): string {
const normalized = raw
.trim()
.toLowerCase()
.replace(/^refs\/heads\//, "")
.replace(/['"`]/g, "");
const withoutPrefix = normalized.startsWith(`${WORKTREE_BRANCH_PREFIX}/`)
? normalized.slice(`${WORKTREE_BRANCH_PREFIX}/`.length)
: normalized;
const branchFragment = withoutPrefix
.replace(/[^a-z0-9/_-]+/g, "-")
.replace(/\/+/g, "/")
.replace(/-+/g, "-")
.replace(/^[./_-]+|[./_-]+$/g, "")
.slice(0, 64)
.replace(/[./_-]+$/g, "");
const safeFragment = branchFragment.length > 0 ? branchFragment : "update";
return `${WORKTREE_BRANCH_PREFIX}/${safeFragment}`;
}
const make = Effect.gen(function* () {
const crypto = yield* Crypto.Crypto;
const orchestrationEngine = yield* OrchestrationEngineService;
const projectionSnapshotQuery = yield* ProjectionSnapshotQuery;
const providerAuthService = yield* ProviderAuthService;
const providerService = yield* ProviderService;
const providerRegistry = yield* ProviderRegistry;
const gitWorkflow = yield* GitWorkflowService;
const fileSystem = yield* FileSystem.FileSystem;
const vcsStatusBroadcaster = yield* VcsStatusBroadcaster;
const textGeneration = yield* TextGeneration;
const serverSettingsService = yield* ServerSettingsService;
const serverCommandId = (tag: string) =>
crypto.randomUUIDv4.pipe(Effect.map((uuid) => CommandId.make(`server:${tag}:${uuid}`)));
const serverEventId = () => crypto.randomUUIDv4.pipe(Effect.map(EventId.make));
const handledTurnStartKeys = yield* Cache.make<string, true>({
capacity: HANDLED_TURN_START_KEY_MAX,
timeToLive: HANDLED_TURN_START_KEY_TTL,
lookup: () => Effect.succeed(true),
});
const hasHandledTurnStartRecently = (key: string) =>
Cache.getOption(handledTurnStartKeys, key).pipe(
Effect.flatMap((cached) =>
Cache.set(handledTurnStartKeys, key, true).pipe(Effect.as(Option.isSome(cached))),
),
);
const threadModelSelections = new Map<string, ModelSelection>();
const appendProviderFailureActivity = (input: {
readonly threadId: ThreadId;
readonly kind:
| "provider.turn.start.failed"
| "provider.turn.interrupt.failed"
| "provider.approval.respond.failed"
| "provider.user-input.respond.failed"
| "provider.session.stop.failed";
readonly summary: string;
readonly detail: string;
readonly turnId: TurnId | null;
readonly createdAt: string;
readonly requestId?: string;
}) =>
Effect.all({
commandId: serverCommandId("provider-failure-activity"),
eventId: serverEventId(),
}).pipe(
Effect.flatMap(({ commandId, eventId }) =>
orchestrationEngine.dispatch({
type: "thread.activity.append",
commandId,
threadId: input.threadId,
activity: {
id: eventId,
tone: "error",
kind: input.kind,
summary: input.summary,
payload: {
detail: input.detail,
...(input.requestId ? { requestId: input.requestId } : {}),
},
turnId: input.turnId,
createdAt: input.createdAt,
},
createdAt: input.createdAt,
}),
),
);
const formatFailureDetail = (cause: Cause.Cause<unknown>): string => {
const failReason = cause.reasons.find(Cause.isFailReason);
const providerError = isProviderAdapterRequestError(failReason?.error)
? failReason.error
: undefined;
if (providerError) {
return providerError.detail;
}
return Cause.pretty(cause);
};
const setThreadSession = (input: {
readonly threadId: ThreadId;
readonly session: OrchestrationSession;
readonly createdAt: string;
}) =>
serverCommandId("provider-session-set").pipe(
Effect.flatMap((commandId) =>
orchestrationEngine.dispatch({
type: "thread.session.set",
commandId,
threadId: input.threadId,
session: input.session,
createdAt: input.createdAt,
}),
),
);
const setThreadSessionErrorOnTurnStartFailure = Effect.fnUntraced(function* (input: {
readonly threadId: ThreadId;
readonly detail: string;
readonly createdAt: string;
}) {
const thread = yield* resolveThread(input.threadId);
if (!thread) {
return;
}
const session = thread.session;
yield* setThreadSession({
threadId: input.threadId,
session: {
...(session ?? {
threadId: input.threadId,
providerName: null,
providerInstanceId: thread.modelSelection.instanceId,
runtimeMode: thread.runtimeMode,
}),
status: session?.status === "stopped" ? "stopped" : "error",
activeTurnId: null,
lastError: input.detail,
updatedAt: input.createdAt,
},
createdAt: input.createdAt,
});
});
const resolveProject = Effect.fnUntraced(function* (projectId: ProjectId) {
return yield* projectionSnapshotQuery
.getProjectShellById(projectId)
.pipe(Effect.map(Option.getOrUndefined));
});
/**
* Recreates a thread's worktree from its branch when the directory has
* disappeared. Provider sessions resume into the persisted cwd, so a missing
* worktree makes every later turn fail as a bogus "session not found".
* Best-effort: on failure the turn proceeds and reports the real error.
*/
const ensureThreadWorktree = Effect.fnUntraced(function* (thread: {
readonly id: ThreadId;
readonly projectId: ProjectId;
readonly branch: string | null;
readonly worktreePath: string | null;
}) {
const { worktreePath, branch } = thread;
if (!worktreePath || !branch) {
return;
}
const exists = yield* fileSystem.exists(worktreePath).pipe(Effect.orElseSucceed(() => true));
if (exists) {
return;
}
const project = yield* resolveProject(thread.projectId);
if (!project) {
return;
}
const cwd = project.workspaceRoot;
yield* Effect.logWarning("provider command reactor recreating missing worktree", {
threadId: thread.id,
worktreePath,
branch,
});
// A directory deleted without `git worktree remove` leaves an admin entry
// that makes `git worktree add` refuse the path; prune clears it.
yield* gitWorkflow.pruneWorktrees({ cwd }).pipe(
Effect.andThen(gitWorkflow.createWorktree({ cwd, refName: branch, path: worktreePath })),
Effect.catchCause((cause) =>
Cause.hasInterruptsOnly(cause)
? Effect.failCause(cause)
: Effect.logWarning("provider command reactor failed to recreate worktree", {
threadId: thread.id,
worktreePath,
cause: Cause.pretty(cause),
}),
),
);
});
const resolveThread = Effect.fnUntraced(function* (threadId: ThreadId) {
return yield* projectionSnapshotQuery
.getThreadDetailById(threadId, { activityKinds: [] })
.pipe(Effect.map(Option.getOrUndefined));
});
const rejectStartedThreadModelChangeIfRequired = Effect.fnUntraced(function* (input: {
readonly threadId: ThreadId;
readonly currentModelSelection: ModelSelection;
readonly requestedModelSelection: ModelSelection | undefined;
}) {
const requestedModelSelection = input.requestedModelSelection;
if (
requestedModelSelection === undefined ||
(input.currentModelSelection.instanceId === requestedModelSelection.instanceId &&
input.currentModelSelection.model === requestedModelSelection.model)
) {
return;
}
const providers = yield* providerRegistry.getProviders;
const requiresNewThread =
providers.find((snapshot) => snapshot.instanceId === input.currentModelSelection.instanceId)
?.requiresNewThreadForModelChange === true ||
providers.find((snapshot) => snapshot.instanceId === requestedModelSelection.instanceId)
?.requiresNewThreadForModelChange === true;
if (!requiresNewThread) {
return;
}
return yield* new ProviderAdapterRequestError({
provider: providerErrorLabelFromInstanceHint({
instanceId: String(requestedModelSelection.instanceId),
modelSelectionInstanceId: String(input.currentModelSelection.instanceId),
}),
method: "thread.turn.start",
detail: `Thread '${input.threadId}' cannot switch models after the conversation has started. Start a new thread to use '${requestedModelSelection.model}'.`,
});
});
const ensureSessionForThread = Effect.fn("ensureSessionForThread")(function* (
threadId: ThreadId,
createdAt: string,
options?: {
readonly modelSelection?: ModelSelection;
readonly pendingTurnStart?: boolean;
},
) {
const thread = yield* resolveThread(threadId);
if (!thread) {
return yield* Effect.die(new Error(`Thread '${threadId}' was not found in read model.`));
}
const desiredRuntimeMode = thread.runtimeMode;
const requestedModelSelection = options?.modelSelection;
const resolveActiveSession = (threadId: ThreadId) =>
providerService
.listSessions()
.pipe(Effect.map((sessions) => sessions.find((session) => session.threadId === threadId)));
const activeSession = yield* resolveActiveSession(threadId);
const activeThreadSession =
thread.session !== null && thread.session.status !== "stopped" && activeSession
? thread.session
: null;
if (
activeThreadSession !== null &&
activeSession !== undefined &&
(activeThreadSession.providerInstanceId === undefined ||
activeSession.providerInstanceId === undefined)
) {
return yield* new ProviderAdapterRequestError({
provider: providerErrorLabel(activeThreadSession.providerName ?? undefined),
method: "thread.turn.start",
detail: `Thread '${threadId}' has an active provider session without a provider instance id.`,
});
}
const currentInstanceId =
activeThreadSession !== null &&
activeSession !== undefined &&
activeSession.providerInstanceId !== undefined
? activeSession.providerInstanceId
: thread.modelSelection.instanceId;
const desiredModelSelection = requestedModelSelection ?? thread.modelSelection;
const desiredInstanceId = desiredModelSelection.instanceId;
const currentInfo = yield* providerService.getInstanceInfo(currentInstanceId).pipe(
Effect.mapError(
() =>
new ProviderAdapterRequestError({
provider: providerErrorLabelFromInstanceHint({
instanceId: String(currentInstanceId),
modelSelectionInstanceId: String(thread.modelSelection.instanceId),
sessionProvider: thread.session?.providerName ?? undefined,
}),
method: "thread.turn.start",
detail: `Thread '${threadId}' references unknown provider instance '${currentInstanceId}'. The instance is not configured in this build.`,
}),
),
);
const desiredInfo = yield* providerService.getInstanceInfo(desiredInstanceId).pipe(
Effect.mapError(
() =>
new ProviderAdapterRequestError({
provider: providerErrorLabelFromInstanceHint({
instanceId: String(desiredModelSelection.instanceId),
}),
method: "thread.turn.start",
detail: `Requested provider instance '${desiredInstanceId}' is not configured in this build.`,
}),
),
);
const desiredDriverKind = desiredInfo.driverKind;
if (!isProviderDriverKind(desiredDriverKind)) {
return yield* new ProviderAdapterRequestError({
provider: providerErrorLabel(String(desiredDriverKind)),
method: "thread.turn.start",
detail: `Requested provider instance '${desiredInstanceId}' uses unknown provider driver '${desiredDriverKind}'. The driver is not installed in this build.`,
});
}
const preferredProvider: ProviderDriverKind = desiredDriverKind;
if (options?.pendingTurnStart === true && thread.session?.status !== "running") {
yield* setThreadSession({
threadId,
session: {
threadId,
status: "starting",
providerName: activeSession?.provider ?? preferredProvider,
providerInstanceId: activeSession?.providerInstanceId ?? desiredInstanceId,
runtimeMode: desiredRuntimeMode,
activeTurnId: null,
lastError: null,
updatedAt: createdAt,
},
createdAt,
});
}
if (thread.session !== null) {
yield* rejectStartedThreadModelChangeIfRequired({
threadId,
currentModelSelection:
activeSession?.model !== undefined
? {
...thread.modelSelection,
instanceId: currentInstanceId,
model: activeSession.model,
}
: thread.modelSelection,
requestedModelSelection,
});
}
if (
thread.session !== null &&
requestedModelSelection !== undefined &&
requestedModelSelection.instanceId !== currentInstanceId
) {
if (currentInfo.driverKind !== desiredInfo.driverKind) {
return yield* new ProviderAdapterRequestError({
provider: preferredProvider,
method: "thread.turn.start",
detail: `Thread '${threadId}' is bound to driver '${currentInfo.driverKind}' and cannot switch to '${desiredInfo.driverKind}'.`,
});
}
if (
currentInfo.continuationIdentity.continuationKey !==
desiredInfo.continuationIdentity.continuationKey
) {
return yield* new ProviderAdapterRequestError({
provider: preferredProvider,
method: "thread.turn.start",
detail: `Thread '${threadId}' cannot switch from instance '${currentInstanceId}' to '${desiredInstanceId}' because their provider resume state is incompatible.`,
});
}
}
const project = yield* resolveProject(thread.projectId);
const effectiveCwd = resolveThreadWorkspaceCwd({
thread,
projects: project ? [project] : [],
});
const refreshWorkspaceSnapshot = effectiveCwd
? providerRegistry
.refreshWorkspaceSnapshot({ instanceId: desiredInstanceId, cwd: effectiveCwd })
.pipe(Effect.forkDetach)
: Effect.void;
const startProviderSession = (input?: {
readonly resumeCursor?: unknown;
readonly provider?: ProviderDriverKind;
}) =>
providerService
.startSession(threadId, {
threadId,
...(preferredProvider ? { provider: preferredProvider } : {}),
providerInstanceId: desiredInstanceId,
...(effectiveCwd ? { cwd: effectiveCwd } : {}),
...(thread.title ? { title: thread.title } : {}),
modelSelection: desiredModelSelection,
...(input?.resumeCursor !== undefined ? { resumeCursor: input.resumeCursor } : {}),
runtimeMode: desiredRuntimeMode,
})
.pipe(Effect.tap(() => refreshWorkspaceSnapshot));
const bindSessionToThread = (session: ProviderSession) =>
Effect.gen(function* () {
if (session.providerInstanceId === undefined) {
return yield* new ProviderAdapterRequestError({
provider: providerErrorLabel(session.provider),
method: "thread.turn.start",
detail: `Provider session '${session.threadId}' started without a provider instance id.`,
});
}
yield* setThreadSession({
threadId,
session: {
threadId,
status:
options?.pendingTurnStart === true && session.status === "ready"
? "starting"
: mapProviderSessionStatusToOrchestrationStatus(session.status),
providerName: session.provider,
providerInstanceId: session.providerInstanceId,
runtimeMode: desiredRuntimeMode,
// Provider turn ids are not orchestration turn ids.
activeTurnId: null,
lastError: session.lastError ?? null,
updatedAt: session.updatedAt,
},
createdAt,
});
});
const existingSessionThreadId =
thread.session && thread.session.status !== "stopped" && activeSession ? thread.id : null;
if (existingSessionThreadId) {
const runtimeModeChanged = thread.runtimeMode !== thread.session?.runtimeMode;
const cwdChanged = effectiveCwd !== activeSession?.cwd;
const sessionModelSwitch = (yield* providerService.getCapabilities(desiredInstanceId))
.sessionModelSwitch;
const modelChanged =
requestedModelSelection !== undefined &&
requestedModelSelection.model !== activeSession?.model;
const instanceChanged =
requestedModelSelection !== undefined &&
activeSession?.providerInstanceId !== requestedModelSelection.instanceId;
const shouldRestartForModelChange = modelChanged && sessionModelSwitch === "unsupported";
const previousModelSelection = threadModelSelections.get(threadId);
const shouldRestartForModelSelectionChange =
preferredProvider === "claudeAgent" &&
requestedModelSelection !== undefined &&
!Equal.equals(previousModelSelection, requestedModelSelection);
if (
!runtimeModeChanged &&
!cwdChanged &&
!instanceChanged &&
!shouldRestartForModelChange &&
!shouldRestartForModelSelectionChange
) {
yield* refreshWorkspaceSnapshot;
return existingSessionThreadId;
}
const resumeCursor = shouldRestartForModelChange
? undefined
: (activeSession?.resumeCursor ?? undefined);
yield* Effect.logInfo("provider command reactor restarting provider session", {
threadId,
existingSessionThreadId,
currentProvider: activeSession?.provider,
currentInstanceId,
desiredInstanceId,
desiredProvider: desiredModelSelection.instanceId,
currentRuntimeMode: thread.session?.runtimeMode,
desiredRuntimeMode: thread.runtimeMode,
runtimeModeChanged,
previousCwd: activeSession?.cwd,
desiredCwd: effectiveCwd,
cwdChanged,
modelChanged,
instanceChanged,
shouldRestartForModelChange,
shouldRestartForModelSelectionChange,
hasResumeCursor: resumeCursor !== undefined,
});
const restartedSession = yield* startProviderSession(
resumeCursor !== undefined ? { resumeCursor } : undefined,
);
yield* Effect.logInfo("provider command reactor restarted provider session", {
threadId,
previousSessionId: existingSessionThreadId,
restartedSessionThreadId: restartedSession.threadId,
provider: restartedSession.provider,
runtimeMode: restartedSession.runtimeMode,
cwd: restartedSession.cwd,
});
yield* bindSessionToThread(restartedSession);
return restartedSession.threadId;
}
const startedSession = yield* startProviderSession(undefined);
yield* bindSessionToThread(startedSession);
return startedSession.threadId;
});
const buildSendTurnRequestForThread = Effect.fnUntraced(function* (input: {
readonly threadId: ThreadId;
readonly messageText: string;
readonly attachments?: ReadonlyArray<ChatAttachment>;
readonly modelSelection?: ModelSelection;
readonly interactionMode?: "default" | "plan";
readonly createdAt: string;
}) {
const thread = yield* resolveThread(input.threadId);
if (!thread) {
return yield* Effect.die(
new Error(`Thread '${input.threadId}' was not found in read model.`),
);
}
yield* ensureSessionForThread(input.threadId, input.createdAt, {
...(input.modelSelection !== undefined ? { modelSelection: input.modelSelection } : {}),
pendingTurnStart: true,
});
if (input.modelSelection !== undefined) {
threadModelSelections.set(input.threadId, input.modelSelection);
}
const normalizedInput = toNonEmptyProviderInput(input.messageText);
const normalizedAttachments = input.attachments ?? [];
const activeSession = yield* providerService
.listSessions()
.pipe(
Effect.map((sessions) => sessions.find((session) => session.threadId === input.threadId)),
);
const sessionModelSwitch =
activeSession === undefined
? "in-session"
: activeSession.providerInstanceId === undefined
? yield* new ProviderAdapterRequestError({
provider: providerErrorLabel(activeSession.provider),
method: "thread.turn.start",
detail: `Active provider session '${activeSession.threadId}' is missing a provider instance id.`,
})
: (yield* providerService.getCapabilities(activeSession.providerInstanceId))
.sessionModelSwitch;
const requestedModelSelection =
input.modelSelection ?? threadModelSelections.get(input.threadId) ?? thread.modelSelection;
const modelForTurn =
sessionModelSwitch === "unsupported" && input.modelSelection === undefined
? activeSession?.model !== undefined
? {
...requestedModelSelection,
model: activeSession.model,
}
: requestedModelSelection
: input.modelSelection;
return {
threadId: input.threadId,
...(normalizedInput ? { input: normalizedInput } : {}),
...(normalizedAttachments.length > 0 ? { attachments: normalizedAttachments } : {}),
...(modelForTurn !== undefined ? { modelSelection: modelForTurn } : {}),
...(input.interactionMode !== undefined ? { interactionMode: input.interactionMode } : {}),
};
});
const maybeGenerateAndRenameWorktreeBranchForFirstTurn = Effect.fn(
"maybeGenerateAndRenameWorktreeBranchForFirstTurn",
)(function* (input: {
readonly threadId: ThreadId;
readonly branch: string | null;
readonly worktreePath: string | null;
readonly messageText: string;
readonly attachments?: ReadonlyArray<ChatAttachment>;
}) {
if (!input.branch || !input.worktreePath) {
return;
}
if (!isTemporaryWorktreeBranch(input.branch)) {
return;
}
const oldBranch = input.branch;
const cwd = input.worktreePath;
const attachments = input.attachments ?? [];
yield* Effect.gen(function* () {
const settings = yield* serverSettingsService.getSettings;
const modelSelection =
settings.sourceControlWriterModelSelection === null
? settings.textGenerationModelSelection
: resolveSourceControlWriterModelSelection(
settings,
yield* providerRegistry.getProviders,
);
const generated = yield* textGeneration.generateBranchName({
cwd,
message: input.messageText,
...(attachments.length > 0 ? { attachments } : {}),
modelSelection,
});
if (!generated) return;
const targetBranch = buildGeneratedWorktreeBranchName(generated.branch);
if (targetBranch === oldBranch) return;
const renamed = yield* gitWorkflow.renameBranch({ cwd, oldBranch, newBranch: targetBranch });
yield* orchestrationEngine.dispatch({
type: "thread.meta.update",
commandId: yield* serverCommandId("worktree-branch-rename"),
threadId: input.threadId,
branch: renamed.branch,
worktreePath: cwd,
});
yield* vcsStatusBroadcaster.refreshStatus(cwd).pipe(Effect.ignoreCause({ log: true }));
}).pipe(
Effect.catchCause((cause) =>
Effect.logWarning("provider command reactor failed to generate or rename worktree branch", {
threadId: input.threadId,
cwd,
oldBranch,
cause: Cause.pretty(cause),
}),
),
);
});
const maybeGenerateThreadTitleForFirstTurn = Effect.fn("maybeGenerateThreadTitleForFirstTurn")(
function* (input: {
readonly threadId: ThreadId;
readonly cwd: string;
readonly messageText: string;
readonly attachments?: ReadonlyArray<ChatAttachment>;
readonly titleSeed?: string;
}) {
const attachments = input.attachments ?? [];
yield* Effect.gen(function* () {
const { textGenerationModelSelection: modelSelection } =
yield* serverSettingsService.getSettings;
const generated = yield* textGeneration
.generateThreadTitle({
cwd: input.cwd,
message: input.messageText,
...(attachments.length > 0 ? { attachments } : {}),
modelSelection,
})
.pipe(
Effect.retry({
times: 2,
schedule: Schedule.exponential("2 seconds"),
}),
);
if (!generated) return;
const thread = yield* resolveThread(input.threadId);
if (!thread) return;
if (!canReplaceThreadTitle(thread.title, input.titleSeed)) {
return;
}
yield* orchestrationEngine.dispatch({
type: "thread.meta.update",
commandId: yield* serverCommandId("thread-title-rename"),
threadId: input.threadId,
title: generated.title,
});
}).pipe(
Effect.catchCause((cause) =>
Effect.logWarning("provider command reactor failed to generate or rename thread title", {
threadId: input.threadId,
cwd: input.cwd,
cause: Cause.pretty(cause),
}),
),
);
},
);
const regenerateThreadTitle = Effect.fn("regenerateThreadTitle")(function* (
event: Extract<ProviderIntentEvent, { type: "thread.meta-updated" }>,
requestId: CommandId,
) {
if (event.payload.regenerateTitle !== true) {
return { _tag: "Superseded" } as const;
}
const thread = yield* resolveThread(event.payload.threadId);
if (!thread || thread.titleRegeneration?.requestId !== requestId) {
return { _tag: "Superseded" } as const;
}
const { message, attachments } = formatThreadTitleContext(thread.messages);
if (message.length === 0) {
return { _tag: "Completed", title: undefined } as const;
}
const previousTitle = event.payload.previousTitle ?? thread.title;
if (thread.title !== previousTitle) {
return { _tag: "Superseded" } as const;
}
const project = yield* resolveProject(thread.projectId);
const cwd =
resolveThreadWorkspaceCwd({
thread,
projects: project ? [project] : [],
}) ?? process.cwd();
const { textGenerationModelSelection: modelSelection } =
yield* serverSettingsService.getSettings;
const generated = yield* textGeneration.generateThreadTitle({
cwd,
message,
previousTitle,
...(attachments.length > 0 ? { attachments } : {}),
modelSelection,
});
if (generated.title === DEFAULT_THREAD_TITLE || generated.title === previousTitle) {
return { _tag: "Completed", title: undefined } as const;
}
const latestThread = yield* resolveThread(event.payload.threadId);
if (
!latestThread ||
latestThread.titleRegeneration?.requestId !== requestId ||
latestThread.title !== previousTitle
) {
return { _tag: "Superseded" } as const;
}
return { _tag: "Completed", title: generated.title } as const;
});
const dispatchThreadTitleRegenerationCompletion = Effect.fn(
"dispatchThreadTitleRegenerationCompletion",
)(function* (input: {
readonly threadId: ThreadId;
readonly requestId: CommandId;
readonly title?: string;
}) {
yield* orchestrationEngine.dispatch({
type: "thread.title.regeneration.complete",
commandId: yield* serverCommandId("thread-title-regeneration-complete"),
threadId: input.threadId,
requestId: input.requestId,
...(input.title !== undefined ? { title: input.title } : {}),
});
});
const findInterruptedThreadTitleRegenerations = Effect.fn(
"findInterruptedThreadTitleRegenerations",
)(function* () {
const readModel = yield* projectionSnapshotQuery.getCommandReadModel();
return readModel.threads.flatMap((thread) => {
const requestId = thread.titleRegeneration?.requestId;
return requestId === undefined ? [] : [{ threadId: thread.id, requestId }];
});
});
const clearInterruptedThreadTitleRegenerations = Effect.fn(
"clearInterruptedThreadTitleRegenerations",
)(function* (
interrupted: ReadonlyArray<{ readonly threadId: ThreadId; readonly requestId: CommandId }>,
) {
yield* Effect.forEach(
interrupted,
({ threadId, requestId }) => {
return dispatchThreadTitleRegenerationCompletion({
threadId,
requestId,
}).pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.interrupt;
}
return Effect.logWarning(
"provider command reactor failed to clear interrupted title regeneration",
{
threadId,
cause: Cause.pretty(cause),
},
);
}),
);
},
{ discard: true },
);
});
const processThreadTitleRegenerationSafely = Effect.fn("processThreadTitleRegenerationSafely")(
function* (event: Extract<ProviderIntentEvent, { type: "thread.meta-updated" }>) {
if (event.payload.regenerateTitle !== true) {
return;
}
const requestId = event.payload.titleRegeneration?.requestId ?? event.commandId;
if (requestId === null) {
return;
}
const result = yield* regenerateThreadTitle(event, requestId).pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.failCause(cause);
}
return Effect.logWarning("provider command reactor failed to regenerate thread title", {
threadId: event.payload.threadId,
cause: Cause.pretty(cause),
}).pipe(Effect.as({ _tag: "Completed", title: undefined } as const));
}),
);
if (result._tag === "Superseded") {
return;
}
const completion = {
threadId: event.payload.threadId,
requestId,
...(result.title !== undefined ? { title: result.title } : {}),
};
yield* dispatchThreadTitleRegenerationCompletion(completion).pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.failCause(cause);
}
return Effect.logWarning(
"provider command reactor retrying title regeneration completion",
{
threadId: event.payload.threadId,
cause: Cause.pretty(cause),
},
).pipe(Effect.andThen(dispatchThreadTitleRegenerationCompletion(completion)));
}),
);
},
(effect, event) =>
effect.pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.failCause(cause);
}
return Effect.logWarning(
"provider command reactor failed to complete title regeneration",
{
threadId: event.payload.threadId,
cause: Cause.pretty(cause),
},
);
}),
),
);
const threadTitleRegenerationWorker = yield* makeDrainableWorker(
processThreadTitleRegenerationSafely,
);
const processTurnStartRequested = Effect.fn("processTurnStartRequested")(function* (
event: Extract<ProviderIntentEvent, { type: "thread.turn-start-requested" }>,
) {
const key = turnStartKeyForEvent(event);
if (yield* hasHandledTurnStartRecently(key)) {
return;
}
const thread = yield* resolveThread(event.payload.threadId);
if (!thread) {
return;
}
const message = thread.messages.find((entry) => entry.id === event.payload.messageId);
if (!message || message.role !== "user") {
yield* appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.turn.start.failed",
summary: "Provider turn start failed",
detail: `User message '${event.payload.messageId}' was not found for turn start request.`,
turnId: null,
createdAt: event.payload.createdAt,
});
return;
}
const handleTurnStartFailure = (cause: Cause.Cause<unknown>) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.void;
}
const detail = formatFailureDetail(cause);
return setThreadSessionErrorOnTurnStartFailure({
threadId: event.payload.threadId,
detail,
createdAt: event.payload.createdAt,
}).pipe(
Effect.flatMap(() =>
appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.turn.start.failed",
summary: "Provider turn start failed",
detail,
turnId: null,
createdAt: event.payload.createdAt,
}),
),
Effect.asVoid,
);
};
const recoverTurnStartFailure = (cause: Cause.Cause<unknown>) =>
handleTurnStartFailure(cause).pipe(
Effect.catchCause((recoveryCause) =>
Effect.logWarning("provider command reactor failed to recover turn start failure", {
eventType: event.type,
threadId: event.payload.threadId,
cause: Cause.pretty(recoveryCause),
originalCause: Cause.pretty(cause),
}),
),
);
const authCommandHandled = yield* Effect.gen(function* () {
// Native account commands belong to the thread's existing provider session.
const instanceId =
thread.session?.providerInstanceId ??
event.payload.modelSelection?.instanceId ??
thread.modelSelection.instanceId;
const handled = yield* providerAuthService.tryHandlePromptCommand({
instanceId,
text: message.text,
hasAttachments: (message.attachments?.length ?? 0) > 0,
});
if (!handled) {
return false;
}
const instanceInfo = yield* providerService.getInstanceInfo(instanceId);
yield* setThreadSession({
threadId: thread.id,
session: {
threadId: thread.id,
status: "stopped",
providerName: instanceInfo.driverKind,
providerInstanceId: instanceId,
runtimeMode: thread.runtimeMode,
activeTurnId: null,
lastError: null,
updatedAt: event.payload.createdAt,
},
createdAt: event.payload.createdAt,
});
yield* orchestrationEngine.dispatch({
type: "thread.activity.append",
commandId: yield* serverCommandId("provider-sign-out"),
threadId: thread.id,
activity: {
id: yield* serverEventId(),
tone: "info",
kind: "provider.auth.signed-out",
summary: "Provider signed out",
payload: { providerInstanceId: instanceId },
turnId: null,
createdAt: event.payload.createdAt,
},
createdAt: event.payload.createdAt,
});
return true;
}).pipe(Effect.catchCause((cause) => recoverTurnStartFailure(cause).pipe(Effect.as(true))));
if (authCommandHandled) {
return;
}
yield* ensureThreadWorktree(thread);
const isFirstUserMessageTurn =
thread.messages.filter((entry) => entry.role === "user").length === 1;
if (isFirstUserMessageTurn) {
const project = yield* resolveProject(thread.projectId);
const generationCwd =
resolveThreadWorkspaceCwd({
thread,
projects: project ? [project] : [],
}) ?? process.cwd();
const generationInput = {
messageText: assistantCitationsToPlainText(message.text),
...(message.attachments !== undefined ? { attachments: message.attachments } : {}),
...(event.payload.titleSeed !== undefined ? { titleSeed: event.payload.titleSeed } : {}),
};
yield* maybeGenerateAndRenameWorktreeBranchForFirstTurn({
threadId: event.payload.threadId,
branch: thread.branch,
worktreePath: thread.worktreePath,
...generationInput,
}).pipe(Effect.forkScoped);
if (canReplaceThreadTitle(thread.title, event.payload.titleSeed)) {
yield* maybeGenerateThreadTitleForFirstTurn({
threadId: event.payload.threadId,
cwd: generationCwd,
...generationInput,
}).pipe(Effect.forkScoped);
}
}
const sendTurnRequest = yield* buildSendTurnRequestForThread({
threadId: event.payload.threadId,
messageText: message.text,
...(message.attachments !== undefined ? { attachments: message.attachments } : {}),
...(event.payload.modelSelection !== undefined
? { modelSelection: event.payload.modelSelection }
: {}),
interactionMode: event.payload.interactionMode,
createdAt: event.payload.createdAt,
}).pipe(
Effect.map(Option.some),
Effect.catchCause((cause) => handleTurnStartFailure(cause).pipe(Effect.as(Option.none()))),
);
if (Option.isNone(sendTurnRequest)) {
return;
}
yield* providerService
.sendTurn(sendTurnRequest.value)
.pipe(Effect.catchCause(recoverTurnStartFailure), Effect.forkScoped);
});
const processTurnInterruptRequested = Effect.fn("processTurnInterruptRequested")(function* (
event: Extract<ProviderIntentEvent, { type: "thread.turn-interrupt-requested" }>,
) {
const thread = yield* resolveThread(event.payload.threadId);
if (!thread) {
return;
}
const session = thread.session;
if (!session || session.status === "stopped") {
return yield* appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.turn.interrupt.failed",
summary: "Provider turn interrupt failed",
detail: "No active provider session is bound to this thread.",
turnId: event.payload.turnId ?? null,
createdAt: event.payload.createdAt,
});
}
const recoverInterruptFailure = (cause: Cause.Cause<unknown>) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.interrupt;
}
const detail = formatFailureDetail(cause);
return Effect.gen(function* () {
const latestThread = yield* resolveThread(event.payload.threadId);
const latestSession = latestThread?.session;
if (
!latestSession ||
latestSession.status === "stopped" ||
latestSession.status === "ready" ||
(event.payload.turnId !== undefined &&
latestSession.activeTurnId !== null &&
latestSession.activeTurnId !== event.payload.turnId)
) {
return;
}
yield* providerService.stopSession({ threadId: event.payload.threadId }).pipe(
Effect.catchCause((stopCause) => {
if (Cause.hasInterruptsOnly(stopCause)) {
return Effect.interrupt;
}
return Effect.logWarning(
"provider command reactor failed to stop session after interrupt failure",
{
threadId: event.payload.threadId,
cause: Cause.pretty(stopCause),
originalCause: Cause.pretty(cause),
},
);
}),
);
const stoppedThread = yield* resolveThread(event.payload.threadId);
const stoppedSession = stoppedThread?.session;
if (
!stoppedSession ||
stoppedSession.status === "stopped" ||
stoppedSession.status === "ready" ||
(event.payload.turnId !== undefined &&
stoppedSession.activeTurnId !== null &&
stoppedSession.activeTurnId !== event.payload.turnId)
) {
return;
}
yield* setThreadSession({
threadId: event.payload.threadId,
session: {
...stoppedSession,
status: "stopped",
activeTurnId: null,
lastError: detail,
updatedAt: event.payload.createdAt,
},
createdAt: event.payload.createdAt,
});
yield* appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.turn.interrupt.failed",
summary: "Provider turn interrupt failed",
detail,
turnId: event.payload.turnId ?? null,
createdAt: event.payload.createdAt,
});
});
};
// Orchestration turn ids are not provider turn ids, so interrupt by session.
yield* providerService
.interruptTurn({ threadId: event.payload.threadId })
.pipe(Effect.catchCause(recoverInterruptFailure));
});
const processApprovalResponseRequested = Effect.fn("processApprovalResponseRequested")(function* (
event: Extract<ProviderIntentEvent, { type: "thread.approval-response-requested" }>,
) {
const thread = yield* resolveThread(event.payload.threadId);
if (!thread) {
return;
}
const hasSession = thread.session && thread.session.status !== "stopped";
if (!hasSession) {
return yield* appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.approval.respond.failed",
summary: "Provider approval response failed",
detail: "No active provider session is bound to this thread.",
turnId: null,
createdAt: event.payload.createdAt,
requestId: event.payload.requestId,
});
}
yield* providerService
.respondToRequest({
threadId: event.payload.threadId,
requestId: event.payload.requestId,
decision: event.payload.decision,
})
.pipe(
Effect.catchCause((cause) =>
appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.approval.respond.failed",
summary: "Provider approval response failed",
detail: isUnknownPendingApprovalRequestError(cause)
? stalePendingRequestDetail("approval", event.payload.requestId)
: Cause.pretty(cause),
turnId: null,
createdAt: event.payload.createdAt,
requestId: event.payload.requestId,
}),
),
);
});
const processUserInputResponseRequested = Effect.fn("processUserInputResponseRequested")(
function* (
event: Extract<ProviderIntentEvent, { type: "thread.user-input-response-requested" }>,
) {
const thread = yield* resolveThread(event.payload.threadId);
if (!thread) {
return;
}
const hasSession = thread.session && thread.session.status !== "stopped";
if (!hasSession) {
return yield* appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.user-input.respond.failed",
summary: "Provider user input response failed",
detail: "No active provider session is bound to this thread.",
turnId: null,
createdAt: event.payload.createdAt,
requestId: event.payload.requestId,
});
}
yield* providerService
.respondToUserInput({
threadId: event.payload.threadId,
requestId: event.payload.requestId,
answers: event.payload.answers,
})
.pipe(
Effect.catchCause((cause) =>
appendProviderFailureActivity({
threadId: event.payload.threadId,
kind: "provider.user-input.respond.failed",
summary: "Provider user input response failed",
detail: isUnknownPendingUserInputRequestError(cause)
? stalePendingRequestDetail("user-input", event.payload.requestId)
: Cause.pretty(cause),
turnId: null,
createdAt: event.payload.createdAt,
requestId: event.payload.requestId,
}),
),
);
},
);
const processSessionStopRequested = Effect.fn("processSessionStopRequested")(function* (
event: Extract<ProviderIntentEvent, { type: "thread.session-stop-requested" }>,
) {
const thread = yield* resolveThread(event.payload.threadId);
if (!thread) {
return;
}
const now = event.payload.createdAt;
if (thread.session && thread.session.status !== "stopped") {
yield* providerService.stopSession({ threadId: thread.id });
}
yield* setThreadSession({
threadId: thread.id,
session: {
threadId: thread.id,
status: "stopped",
providerName: thread.session?.providerName ?? null,
...(thread.session?.providerInstanceId !== undefined
? { providerInstanceId: thread.session.providerInstanceId }
: {}),
runtimeMode: thread.session?.runtimeMode ?? DEFAULT_RUNTIME_MODE,
activeTurnId: null,
lastError: thread.session?.lastError ?? null,
updatedAt: now,
},
createdAt: now,
});
});
const processDomainEvent = Effect.fn("processDomainEvent")(function* (
event: ProviderIntentEvent,
) {
yield* Effect.annotateCurrentSpan({
"orchestration.event_type": event.type,
"orchestration.thread_id": event.payload.threadId,
...(event.commandId ? { "orchestration.command_id": event.commandId } : {}),
});
yield* increment(orchestrationEventsProcessedTotal, {
eventType: event.type,
});
switch (event.type) {
case "thread.meta-updated":
yield* threadTitleRegenerationWorker.enqueue(event);
return;
case "thread.runtime-mode-set": {
const thread = yield* resolveThread(event.payload.threadId);
if (!thread?.session || thread.session.status === "stopped") {
return;
}
const cachedModelSelection = threadModelSelections.get(event.payload.threadId);
yield* ensureSessionForThread(
event.payload.threadId,
event.occurredAt,
cachedModelSelection !== undefined ? { modelSelection: cachedModelSelection } : {},
);
return;
}
case "thread.turn-start-requested":
yield* processTurnStartRequested(event);
return;
case "thread.turn-interrupt-requested":
yield* processTurnInterruptRequested(event);
return;
case "thread.approval-response-requested":
yield* processApprovalResponseRequested(event);
return;
case "thread.user-input-response-requested":
yield* processUserInputResponseRequested(event);
return;
case "thread.session-stop-requested":
yield* processSessionStopRequested(event);
return;
case "thread.settled": {
const thread = yield* projectionSnapshotQuery.getThreadShellById(event.payload.threadId);
if (
Option.isNone(thread) ||
thread.value.session == null ||
thread.value.session.status === "stopped"
) {
return;
}
yield* orchestrationEngine.dispatch({
type: "thread.session.stop",
commandId: CommandId.make(`session-stop-for-settle:${event.commandId ?? event.eventId}`),
threadId: event.payload.threadId,
createdAt: event.occurredAt,
onlyIfSettled: true,
});
return;
}
}
});
const processDomainEventSafely = (event: ProviderIntentEvent) =>
processDomainEvent(event).pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.interrupt;
}
return Effect.logWarning("provider command reactor failed to process event", {
eventType: event.type,
cause: Cause.pretty(cause),
});
}),
);
const worker = yield* makeDrainableWorker(processDomainEventSafely);
const start: ProviderCommandReactorShape["start"] = Effect.fn("start")(function* () {
const interruptedTitleRegenerations = yield* findInterruptedThreadTitleRegenerations().pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.interrupt;
}
return Effect.logWarning(
"provider command reactor failed to find interrupted title regenerations",
{ cause: Cause.pretty(cause) },
).pipe(Effect.as([]));
}),
);
const processEvent = Effect.fn("processEvent")(function* (event: OrchestrationEvent) {
if (
(event.type === "thread.meta-updated" && event.payload.regenerateTitle === true) ||
event.type === "thread.runtime-mode-set" ||
event.type === "thread.turn-start-requested" ||
event.type === "thread.turn-interrupt-requested" ||
event.type === "thread.approval-response-requested" ||
event.type === "thread.user-input-response-requested" ||
event.type === "thread.session-stop-requested" ||
event.type === "thread.settled"
) {
return yield* worker.enqueue(event);
}
});
// Subscribe before returning, even while event handling waits for server activation.
const domainEvents = yield* orchestrationEngine.subscribeDomainEvents;
yield* forkParked(Stream.runForEach(domainEvents, processEvent));
// The domain event stream is hot, so work pending before this reactor
// starts cannot be resumed. Correlated completions only clear the request
// captured here, leaving any newer request untouched.
const clearInterrupted = clearInterruptedThreadTitleRegenerations(
interruptedTitleRegenerations,
).pipe(
Effect.catchCause((cause) => {
if (Cause.hasInterruptsOnly(cause)) {
return Effect.interrupt;
}
return Effect.logWarning(
"provider command reactor failed to clear interrupted title regenerations",
{
cause: Cause.pretty(cause),
},
);
}),
);
const activation = yield* ServerActivation;
if (activation === undefined) {
yield* clearInterrupted;
} else {
yield* forkParked(clearInterrupted);
}
});
return {
start,
drain: Effect.gen(function* () {
yield* worker.drain;
yield* threadTitleRegenerationWorker.drain;
}),
} satisfies ProviderCommandReactorShape;
});
export const ProviderCommandReactorLive = Layer.effect(ProviderCommandReactor, make);
