feat(telegram/acp): Topic Binding, Pin Binding Message, Fix Spawn Param Parsing (#36683)

* fix(acp): normalize unicode flags and Telegram topic binding

* feat(telegram/acp): restore topic-bound ACP and session bindings

* fix(acpx): clarify permission-denied guidance

* feat(telegram/acp): pin spawn bind notice in topics

* docs(telegram): document ACP topic thread binding behavior

* refactor(reply): share Telegram conversation-id resolver

* fix(telegram/acp): preserve bound session routing semantics

* fix(telegram): respect binding persistence and expiry reporting

* refactor(telegram): simplify binding lifecycle persistence

* fix(telegram): bind acp spawns in direct messages

* fix: document telegram ACP topic binding changelog (#36683) (thanks @huntharo)

---------

Co-authored-by: Onur <2453968+osolmaz@users.noreply.github.com>

src/telegram/thread-bindings.ts

@@ -0,0 +1,741 @@
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+import { formatThreadBindingDurationLabel } from "../channels/thread-bindings-messages.js";
+import { resolveStateDir } from "../config/paths.js";
+import { logVerbose } from "../globals.js";
+import { writeJsonAtomic } from "../infra/json-files.js";
+import {
+  registerSessionBindingAdapter,
+  unregisterSessionBindingAdapter,
+  type BindingTargetKind,
+  type SessionBindingRecord,
+} from "../infra/outbound/session-binding-service.js";
+import { normalizeAccountId } from "../routing/session-key.js";
+
+const DEFAULT_THREAD_BINDING_IDLE_TIMEOUT_MS = 24 * 60 * 60 * 1000;
+const DEFAULT_THREAD_BINDING_MAX_AGE_MS = 0;
+const THREAD_BINDINGS_SWEEP_INTERVAL_MS = 60_000;
+const STORE_VERSION = 1;
+
+type TelegramBindingTargetKind = "subagent" | "acp";
+
+export type TelegramThreadBindingRecord = {
+  accountId: string;
+  conversationId: string;
+  targetKind: TelegramBindingTargetKind;
+  targetSessionKey: string;
+  agentId?: string;
+  label?: string;
+  boundBy?: string;
+  boundAt: number;
+  lastActivityAt: number;
+  idleTimeoutMs?: number;
+  maxAgeMs?: number;
+};
+
+type StoredTelegramBindingState = {
+  version: number;
+  bindings: TelegramThreadBindingRecord[];
+};
+
+export type TelegramThreadBindingManager = {
+  accountId: string;
+  shouldPersistMutations: () => boolean;
+  getIdleTimeoutMs: () => number;
+  getMaxAgeMs: () => number;
+  getByConversationId: (conversationId: string) => TelegramThreadBindingRecord | undefined;
+  listBySessionKey: (targetSessionKey: string) => TelegramThreadBindingRecord[];
+  listBindings: () => TelegramThreadBindingRecord[];
+  touchConversation: (conversationId: string, at?: number) => TelegramThreadBindingRecord | null;
+  unbindConversation: (params: {
+    conversationId: string;
+    reason?: string;
+    sendFarewell?: boolean;
+  }) => TelegramThreadBindingRecord | null;
+  unbindBySessionKey: (params: {
+    targetSessionKey: string;
+    reason?: string;
+    sendFarewell?: boolean;
+  }) => TelegramThreadBindingRecord[];
+  stop: () => void;
+};
+
+const MANAGERS_BY_ACCOUNT_ID = new Map<string, TelegramThreadBindingManager>();
+const BINDINGS_BY_ACCOUNT_CONVERSATION = new Map<string, TelegramThreadBindingRecord>();
+
+function normalizeDurationMs(raw: unknown, fallback: number): number {
+  if (typeof raw !== "number" || !Number.isFinite(raw)) {
+    return fallback;
+  }
+  return Math.max(0, Math.floor(raw));
+}
+
+function normalizeConversationId(raw: unknown): string | undefined {
+  if (typeof raw !== "string") {
+    return undefined;
+  }
+  const trimmed = raw.trim();
+  return trimmed || undefined;
+}
+
+function resolveBindingKey(params: { accountId: string; conversationId: string }): string {
+  return `${params.accountId}:${params.conversationId}`;
+}
+
+function toSessionBindingTargetKind(raw: TelegramBindingTargetKind): BindingTargetKind {
+  return raw === "subagent" ? "subagent" : "session";
+}
+
+function toTelegramTargetKind(raw: BindingTargetKind): TelegramBindingTargetKind {
+  return raw === "subagent" ? "subagent" : "acp";
+}
+
+function resolveEffectiveBindingExpiresAt(params: {
+  record: TelegramThreadBindingRecord;
+  defaultIdleTimeoutMs: number;
+  defaultMaxAgeMs: number;
+}): number | undefined {
+  const idleTimeoutMs =
+    typeof params.record.idleTimeoutMs === "number"
+      ? Math.max(0, Math.floor(params.record.idleTimeoutMs))
+      : params.defaultIdleTimeoutMs;
+  const maxAgeMs =
+    typeof params.record.maxAgeMs === "number"
+      ? Math.max(0, Math.floor(params.record.maxAgeMs))
+      : params.defaultMaxAgeMs;
+
+  const inactivityExpiresAt =
+    idleTimeoutMs > 0
+      ? Math.max(params.record.lastActivityAt, params.record.boundAt) + idleTimeoutMs
+      : undefined;
+  const maxAgeExpiresAt = maxAgeMs > 0 ? params.record.boundAt + maxAgeMs : undefined;
+
+  if (inactivityExpiresAt != null && maxAgeExpiresAt != null) {
+    return Math.min(inactivityExpiresAt, maxAgeExpiresAt);
+  }
+  return inactivityExpiresAt ?? maxAgeExpiresAt;
+}
+
+function toSessionBindingRecord(
+  record: TelegramThreadBindingRecord,
+  defaults: { idleTimeoutMs: number; maxAgeMs: number },
+): SessionBindingRecord {
+  return {
+    bindingId: resolveBindingKey({
+      accountId: record.accountId,
+      conversationId: record.conversationId,
+    }),
+    targetSessionKey: record.targetSessionKey,
+    targetKind: toSessionBindingTargetKind(record.targetKind),
+    conversation: {
+      channel: "telegram",
+      accountId: record.accountId,
+      conversationId: record.conversationId,
+    },
+    status: "active",
+    boundAt: record.boundAt,
+    expiresAt: resolveEffectiveBindingExpiresAt({
+      record,
+      defaultIdleTimeoutMs: defaults.idleTimeoutMs,
+      defaultMaxAgeMs: defaults.maxAgeMs,
+    }),
+    metadata: {
+      agentId: record.agentId,
+      label: record.label,
+      boundBy: record.boundBy,
+      lastActivityAt: record.lastActivityAt,
+      idleTimeoutMs:
+        typeof record.idleTimeoutMs === "number"
+          ? Math.max(0, Math.floor(record.idleTimeoutMs))
+          : defaults.idleTimeoutMs,
+      maxAgeMs:
+        typeof record.maxAgeMs === "number"
+          ? Math.max(0, Math.floor(record.maxAgeMs))
+          : defaults.maxAgeMs,
+    },
+  };
+}
+
+function fromSessionBindingInput(params: {
+  accountId: string;
+  input: {
+    targetSessionKey: string;
+    targetKind: BindingTargetKind;
+    conversationId: string;
+    metadata?: Record<string, unknown>;
+  };
+}): TelegramThreadBindingRecord {
+  const now = Date.now();
+  const metadata = params.input.metadata ?? {};
+  const existing = BINDINGS_BY_ACCOUNT_CONVERSATION.get(
+    resolveBindingKey({
+      accountId: params.accountId,
+      conversationId: params.input.conversationId,
+    }),
+  );
+
+  const record: TelegramThreadBindingRecord = {
+    accountId: params.accountId,
+    conversationId: params.input.conversationId,
+    targetKind: toTelegramTargetKind(params.input.targetKind),
+    targetSessionKey: params.input.targetSessionKey,
+    agentId:
+      typeof metadata.agentId === "string" && metadata.agentId.trim()
+        ? metadata.agentId.trim()
+        : existing?.agentId,
+    label:
+      typeof metadata.label === "string" && metadata.label.trim()
+        ? metadata.label.trim()
+        : existing?.label,
+    boundBy:
+      typeof metadata.boundBy === "string" && metadata.boundBy.trim()
+        ? metadata.boundBy.trim()
+        : existing?.boundBy,
+    boundAt: now,
+    lastActivityAt: now,
+  };
+
+  if (typeof metadata.idleTimeoutMs === "number" && Number.isFinite(metadata.idleTimeoutMs)) {
+    record.idleTimeoutMs = Math.max(0, Math.floor(metadata.idleTimeoutMs));
+  } else if (typeof existing?.idleTimeoutMs === "number") {
+    record.idleTimeoutMs = existing.idleTimeoutMs;
+  }
+
+  if (typeof metadata.maxAgeMs === "number" && Number.isFinite(metadata.maxAgeMs)) {
+    record.maxAgeMs = Math.max(0, Math.floor(metadata.maxAgeMs));
+  } else if (typeof existing?.maxAgeMs === "number") {
+    record.maxAgeMs = existing.maxAgeMs;
+  }
+
+  return record;
+}
+
+function resolveBindingsPath(accountId: string, env: NodeJS.ProcessEnv = process.env): string {
+  const stateDir = resolveStateDir(env, os.homedir);
+  return path.join(stateDir, "telegram", `thread-bindings-${accountId}.json`);
+}
+
+function summarizeLifecycleForLog(
+  record: TelegramThreadBindingRecord,
+  defaults: {
+    idleTimeoutMs: number;
+    maxAgeMs: number;
+  },
+) {
+  const idleTimeoutMs =
+    typeof record.idleTimeoutMs === "number" ? record.idleTimeoutMs : defaults.idleTimeoutMs;
+  const maxAgeMs = typeof record.maxAgeMs === "number" ? record.maxAgeMs : defaults.maxAgeMs;
+  const idleLabel = formatThreadBindingDurationLabel(Math.max(0, Math.floor(idleTimeoutMs)));
+  const maxAgeLabel = formatThreadBindingDurationLabel(Math.max(0, Math.floor(maxAgeMs)));
+  return `idle=${idleLabel} maxAge=${maxAgeLabel}`;
+}
+
+function loadBindingsFromDisk(accountId: string): TelegramThreadBindingRecord[] {
+  const filePath = resolveBindingsPath(accountId);
+  try {
+    const raw = fs.readFileSync(filePath, "utf-8");
+    const parsed = JSON.parse(raw) as StoredTelegramBindingState;
+    if (parsed?.version !== STORE_VERSION || !Array.isArray(parsed.bindings)) {
+      return [];
+    }
+    const bindings: TelegramThreadBindingRecord[] = [];
+    for (const entry of parsed.bindings) {
+      const conversationId = normalizeConversationId(entry?.conversationId);
+      const targetSessionKey =
+        typeof entry?.targetSessionKey === "string" ? entry.targetSessionKey.trim() : "";
+      const targetKind = entry?.targetKind === "subagent" ? "subagent" : "acp";
+      if (!conversationId || !targetSessionKey) {
+        continue;
+      }
+      const boundAt =
+        typeof entry?.boundAt === "number" && Number.isFinite(entry.boundAt)
+          ? Math.floor(entry.boundAt)
+          : Date.now();
+      const lastActivityAt =
+        typeof entry?.lastActivityAt === "number" && Number.isFinite(entry.lastActivityAt)
+          ? Math.floor(entry.lastActivityAt)
+          : boundAt;
+      const record: TelegramThreadBindingRecord = {
+        accountId,
+        conversationId,
+        targetSessionKey,
+        targetKind,
+        boundAt,
+        lastActivityAt,
+      };
+      if (typeof entry?.idleTimeoutMs === "number" && Number.isFinite(entry.idleTimeoutMs)) {
+        record.idleTimeoutMs = Math.max(0, Math.floor(entry.idleTimeoutMs));
+      }
+      if (typeof entry?.maxAgeMs === "number" && Number.isFinite(entry.maxAgeMs)) {
+        record.maxAgeMs = Math.max(0, Math.floor(entry.maxAgeMs));
+      }
+      if (typeof entry?.agentId === "string" && entry.agentId.trim()) {
+        record.agentId = entry.agentId.trim();
+      }
+      if (typeof entry?.label === "string" && entry.label.trim()) {
+        record.label = entry.label.trim();
+      }
+      if (typeof entry?.boundBy === "string" && entry.boundBy.trim()) {
+        record.boundBy = entry.boundBy.trim();
+      }
+      bindings.push(record);
+    }
+    return bindings;
+  } catch (err) {
+    const code = (err as { code?: string }).code;
+    if (code !== "ENOENT") {
+      logVerbose(`telegram thread bindings load failed (${accountId}): ${String(err)}`);
+    }
+    return [];
+  }
+}
+
+async function persistBindingsToDisk(params: {
+  accountId: string;
+  persist: boolean;
+}): Promise<void> {
+  if (!params.persist) {
+    return;
+  }
+  const bindings = [...BINDINGS_BY_ACCOUNT_CONVERSATION.values()].filter(
+    (entry) => entry.accountId === params.accountId,
+  );
+  const payload: StoredTelegramBindingState = {
+    version: STORE_VERSION,
+    bindings,
+  };
+  await writeJsonAtomic(resolveBindingsPath(params.accountId), payload, {
+    mode: 0o600,
+    trailingNewline: true,
+    ensureDirMode: 0o700,
+  });
+}
+
+function resolveThreadIdFromBindingId(params: {
+  accountId: string;
+  bindingId?: string;
+}): string | undefined {
+  const bindingId = params.bindingId?.trim();
+  if (!bindingId) {
+    return undefined;
+  }
+  const prefix = `${params.accountId}:`;
+  if (!bindingId.startsWith(prefix)) {
+    return undefined;
+  }
+  const conversationId = bindingId.slice(prefix.length).trim();
+  return conversationId || undefined;
+}
+
+function normalizeTimestampMs(raw: unknown): number {
+  if (typeof raw !== "number" || !Number.isFinite(raw)) {
+    return Date.now();
+  }
+  return Math.max(0, Math.floor(raw));
+}
+
+function shouldExpireByIdle(params: {
+  now: number;
+  record: TelegramThreadBindingRecord;
+  defaultIdleTimeoutMs: number;
+}): boolean {
+  const idleTimeoutMs =
+    typeof params.record.idleTimeoutMs === "number"
+      ? Math.max(0, Math.floor(params.record.idleTimeoutMs))
+      : params.defaultIdleTimeoutMs;
+  if (idleTimeoutMs <= 0) {
+    return false;
+  }
+  return (
+    params.now >= Math.max(params.record.lastActivityAt, params.record.boundAt) + idleTimeoutMs
+  );
+}
+
+function shouldExpireByMaxAge(params: {
+  now: number;
+  record: TelegramThreadBindingRecord;
+  defaultMaxAgeMs: number;
+}): boolean {
+  const maxAgeMs =
+    typeof params.record.maxAgeMs === "number"
+      ? Math.max(0, Math.floor(params.record.maxAgeMs))
+      : params.defaultMaxAgeMs;
+  if (maxAgeMs <= 0) {
+    return false;
+  }
+  return params.now >= params.record.boundAt + maxAgeMs;
+}
+
+export function createTelegramThreadBindingManager(
+  params: {
+    accountId?: string;
+    persist?: boolean;
+    idleTimeoutMs?: number;
+    maxAgeMs?: number;
+    enableSweeper?: boolean;
+  } = {},
+): TelegramThreadBindingManager {
+  const accountId = normalizeAccountId(params.accountId);
+  const existing = MANAGERS_BY_ACCOUNT_ID.get(accountId);
+  if (existing) {
+    return existing;
+  }
+
+  const persist = params.persist ?? true;
+  const idleTimeoutMs = normalizeDurationMs(
+    params.idleTimeoutMs,
+    DEFAULT_THREAD_BINDING_IDLE_TIMEOUT_MS,
+  );
+  const maxAgeMs = normalizeDurationMs(params.maxAgeMs, DEFAULT_THREAD_BINDING_MAX_AGE_MS);
+
+  const loaded = loadBindingsFromDisk(accountId);
+  for (const entry of loaded) {
+    const key = resolveBindingKey({
+      accountId,
+      conversationId: entry.conversationId,
+    });
+    BINDINGS_BY_ACCOUNT_CONVERSATION.set(key, {
+      ...entry,
+      accountId,
+    });
+  }
+
+  const listBindingsForAccount = () =>
+    [...BINDINGS_BY_ACCOUNT_CONVERSATION.values()].filter((entry) => entry.accountId === accountId);
+
+  let sweepTimer: NodeJS.Timeout | null = null;
+
+  const manager: TelegramThreadBindingManager = {
+    accountId,
+    shouldPersistMutations: () => persist,
+    getIdleTimeoutMs: () => idleTimeoutMs,
+    getMaxAgeMs: () => maxAgeMs,
+    getByConversationId: (conversationIdRaw) => {
+      const conversationId = normalizeConversationId(conversationIdRaw);
+      if (!conversationId) {
+        return undefined;
+      }
+      return BINDINGS_BY_ACCOUNT_CONVERSATION.get(
+        resolveBindingKey({
+          accountId,
+          conversationId,
+        }),
+      );
+    },
+    listBySessionKey: (targetSessionKeyRaw) => {
+      const targetSessionKey = targetSessionKeyRaw.trim();
+      if (!targetSessionKey) {
+        return [];
+      }
+      return listBindingsForAccount().filter(
+        (entry) => entry.targetSessionKey === targetSessionKey,
+      );
+    },
+    listBindings: () => listBindingsForAccount(),
+    touchConversation: (conversationIdRaw, at) => {
+      const conversationId = normalizeConversationId(conversationIdRaw);
+      if (!conversationId) {
+        return null;
+      }
+      const key = resolveBindingKey({ accountId, conversationId });
+      const existing = BINDINGS_BY_ACCOUNT_CONVERSATION.get(key);
+      if (!existing) {
+        return null;
+      }
+      const nextRecord: TelegramThreadBindingRecord = {
+        ...existing,
+        lastActivityAt: normalizeTimestampMs(at ?? Date.now()),
+      };
+      BINDINGS_BY_ACCOUNT_CONVERSATION.set(key, nextRecord);
+      void persistBindingsToDisk({ accountId, persist: manager.shouldPersistMutations() });
+      return nextRecord;
+    },
+    unbindConversation: (unbindParams) => {
+      const conversationId = normalizeConversationId(unbindParams.conversationId);
+      if (!conversationId) {
+        return null;
+      }
+      const key = resolveBindingKey({ accountId, conversationId });
+      const removed = BINDINGS_BY_ACCOUNT_CONVERSATION.get(key) ?? null;
+      if (!removed) {
+        return null;
+      }
+      BINDINGS_BY_ACCOUNT_CONVERSATION.delete(key);
+      void persistBindingsToDisk({ accountId, persist: manager.shouldPersistMutations() });
+      return removed;
+    },
+    unbindBySessionKey: (unbindParams) => {
+      const targetSessionKey = unbindParams.targetSessionKey.trim();
+      if (!targetSessionKey) {
+        return [];
+      }
+      const removed: TelegramThreadBindingRecord[] = [];
+      for (const entry of listBindingsForAccount()) {
+        if (entry.targetSessionKey !== targetSessionKey) {
+          continue;
+        }
+        const key = resolveBindingKey({
+          accountId,
+          conversationId: entry.conversationId,
+        });
+        BINDINGS_BY_ACCOUNT_CONVERSATION.delete(key);
+        removed.push(entry);
+      }
+      if (removed.length > 0) {
+        void persistBindingsToDisk({ accountId, persist: manager.shouldPersistMutations() });
+      }
+      return removed;
+    },
+    stop: () => {
+      if (sweepTimer) {
+        clearInterval(sweepTimer);
+        sweepTimer = null;
+      }
+      unregisterSessionBindingAdapter({ channel: "telegram", accountId });
+      const existingManager = MANAGERS_BY_ACCOUNT_ID.get(accountId);
+      if (existingManager === manager) {
+        MANAGERS_BY_ACCOUNT_ID.delete(accountId);
+      }
+    },
+  };
+
+  registerSessionBindingAdapter({
+    channel: "telegram",
+    accountId,
+    capabilities: {
+      placements: ["current"],
+    },
+    bind: async (input) => {
+      if (input.conversation.channel !== "telegram") {
+        return null;
+      }
+      if (input.placement === "child") {
+        return null;
+      }
+      const conversationId = normalizeConversationId(input.conversation.conversationId);
+      const targetSessionKey = input.targetSessionKey.trim();
+      if (!conversationId || !targetSessionKey) {
+        return null;
+      }
+      const record = fromSessionBindingInput({
+        accountId,
+        input: {
+          targetSessionKey,
+          targetKind: input.targetKind,
+          conversationId,
+          metadata: input.metadata,
+        },
+      });
+      BINDINGS_BY_ACCOUNT_CONVERSATION.set(
+        resolveBindingKey({ accountId, conversationId }),
+        record,
+      );
+      void persistBindingsToDisk({ accountId, persist: manager.shouldPersistMutations() });
+      logVerbose(
+        `telegram: bound conversation ${conversationId} -> ${targetSessionKey} (${summarizeLifecycleForLog(
+          record,
+          {
+            idleTimeoutMs,
+            maxAgeMs,
+          },
+        )})`,
+      );
+      return toSessionBindingRecord(record, {
+        idleTimeoutMs,
+        maxAgeMs,
+      });
+    },
+    listBySession: (targetSessionKeyRaw) => {
+      const targetSessionKey = targetSessionKeyRaw.trim();
+      if (!targetSessionKey) {
+        return [];
+      }
+      return manager.listBySessionKey(targetSessionKey).map((entry) =>
+        toSessionBindingRecord(entry, {
+          idleTimeoutMs,
+          maxAgeMs,
+        }),
+      );
+    },
+    resolveByConversation: (ref) => {
+      if (ref.channel !== "telegram") {
+        return null;
+      }
+      const conversationId = normalizeConversationId(ref.conversationId);
+      if (!conversationId) {
+        return null;
+      }
+      const record = manager.getByConversationId(conversationId);
+      return record
+        ? toSessionBindingRecord(record, {
+            idleTimeoutMs,
+            maxAgeMs,
+          })
+        : null;
+    },
+    touch: (bindingId, at) => {
+      const conversationId = resolveThreadIdFromBindingId({
+        accountId,
+        bindingId,
+      });
+      if (!conversationId) {
+        return;
+      }
+      manager.touchConversation(conversationId, at);
+    },
+    unbind: async (input) => {
+      if (input.targetSessionKey?.trim()) {
+        const removed = manager.unbindBySessionKey({
+          targetSessionKey: input.targetSessionKey,
+          reason: input.reason,
+          sendFarewell: false,
+        });
+        return removed.map((entry) =>
+          toSessionBindingRecord(entry, {
+            idleTimeoutMs,
+            maxAgeMs,
+          }),
+        );
+      }
+      const conversationId = resolveThreadIdFromBindingId({
+        accountId,
+        bindingId: input.bindingId,
+      });
+      if (!conversationId) {
+        return [];
+      }
+      const removed = manager.unbindConversation({
+        conversationId,
+        reason: input.reason,
+        sendFarewell: false,
+      });
+      return removed
+        ? [
+            toSessionBindingRecord(removed, {
+              idleTimeoutMs,
+              maxAgeMs,
+            }),
+          ]
+        : [];
+    },
+  });
+
+  const sweeperEnabled = params.enableSweeper !== false;
+  if (sweeperEnabled) {
+    sweepTimer = setInterval(() => {
+      const now = Date.now();
+      for (const record of listBindingsForAccount()) {
+        const idleExpired = shouldExpireByIdle({
+          now,
+          record,
+          defaultIdleTimeoutMs: idleTimeoutMs,
+        });
+        const maxAgeExpired = shouldExpireByMaxAge({
+          now,
+          record,
+          defaultMaxAgeMs: maxAgeMs,
+        });
+        if (!idleExpired && !maxAgeExpired) {
+          continue;
+        }
+        manager.unbindConversation({
+          conversationId: record.conversationId,
+          reason: idleExpired ? "idle-expired" : "max-age-expired",
+          sendFarewell: false,
+        });
+      }
+    }, THREAD_BINDINGS_SWEEP_INTERVAL_MS);
+    sweepTimer.unref?.();
+  }
+
+  MANAGERS_BY_ACCOUNT_ID.set(accountId, manager);
+  return manager;
+}
+
+export function getTelegramThreadBindingManager(
+  accountId?: string,
+): TelegramThreadBindingManager | null {
+  return MANAGERS_BY_ACCOUNT_ID.get(normalizeAccountId(accountId)) ?? null;
+}
+
+function updateTelegramBindingsBySessionKey(params: {
+  manager: TelegramThreadBindingManager;
+  targetSessionKey: string;
+  update: (entry: TelegramThreadBindingRecord, now: number) => TelegramThreadBindingRecord;
+}): TelegramThreadBindingRecord[] {
+  const targetSessionKey = params.targetSessionKey.trim();
+  if (!targetSessionKey) {
+    return [];
+  }
+  const now = Date.now();
+  const updated: TelegramThreadBindingRecord[] = [];
+  for (const entry of params.manager.listBySessionKey(targetSessionKey)) {
+    const key = resolveBindingKey({
+      accountId: params.manager.accountId,
+      conversationId: entry.conversationId,
+    });
+    const next = params.update(entry, now);
+    BINDINGS_BY_ACCOUNT_CONVERSATION.set(key, next);
+    updated.push(next);
+  }
+  if (updated.length > 0) {
+    void persistBindingsToDisk({
+      accountId: params.manager.accountId,
+      persist: params.manager.shouldPersistMutations(),
+    });
+  }
+  return updated;
+}
+
+export function setTelegramThreadBindingIdleTimeoutBySessionKey(params: {
+  targetSessionKey: string;
+  accountId?: string;
+  idleTimeoutMs: number;
+}): TelegramThreadBindingRecord[] {
+  const manager = getTelegramThreadBindingManager(params.accountId);
+  if (!manager) {
+    return [];
+  }
+  const idleTimeoutMs = normalizeDurationMs(params.idleTimeoutMs, 0);
+  return updateTelegramBindingsBySessionKey({
+    manager,
+    targetSessionKey: params.targetSessionKey,
+    update: (entry, now) => ({
+      ...entry,
+      idleTimeoutMs,
+      lastActivityAt: now,
+    }),
+  });
+}
+
+export function setTelegramThreadBindingMaxAgeBySessionKey(params: {
+  targetSessionKey: string;
+  accountId?: string;
+  maxAgeMs: number;
+}): TelegramThreadBindingRecord[] {
+  const manager = getTelegramThreadBindingManager(params.accountId);
+  if (!manager) {
+    return [];
+  }
+  const maxAgeMs = normalizeDurationMs(params.maxAgeMs, 0);
+  return updateTelegramBindingsBySessionKey({
+    manager,
+    targetSessionKey: params.targetSessionKey,
+    update: (entry, now) => ({
+      ...entry,
+      maxAgeMs,
+      lastActivityAt: now,
+    }),
+  });
+}
+
+export const __testing = {
+  resetTelegramThreadBindingsForTests() {
+    for (const manager of MANAGERS_BY_ACCOUNT_ID.values()) {
+      manager.stop();
+    }
+    MANAGERS_BY_ACCOUNT_ID.clear();
+    BINDINGS_BY_ACCOUNT_CONVERSATION.clear();
+  },
+};