ACP: add persistent Discord channel and Telegram topic bindings (#34873)

* docs: add ACP persistent binding experiment plan

* docs: align ACP persistent binding spec to channel-local config

* docs: scope Telegram ACP bindings to forum topics only

* docs: lock bound /new and /reset behavior to in-place ACP reset

* ACP: add persistent discord/telegram conversation bindings

* ACP: fix persistent binding reuse and discord thread parent context

* docs: document channel-specific persistent ACP bindings

* ACP: split persistent bindings and share conversation id helpers

* ACP: defer configured binding init until preflight passes

* ACP: fix discord thread parent fallback and explicit disable inheritance

* ACP: keep bound /new and /reset in-place

* ACP: honor configured bindings in native command flows

* ACP: avoid configured fallback after runtime bind failure

* docs: refine ACP bindings experiment config examples

* acp: cut over to typed top-level persistent bindings

* ACP bindings: harden reset recovery and native command auth

* Docs: add ACP bound command auth proposal

* Tests: normalize i18n registry zh-CN assertion encoding

* ACP bindings: address review findings for reset and fallback routing

* ACP reset: gate hooks on success and preserve /new arguments

* ACP bindings: fix auth and binding-priority review findings

* Telegram ACP: gate ensure on auth and accepted messages

* ACP bindings: fix session-key precedence and unavailable handling

* ACP reset/native commands: honor fallback targets and abort on bootstrap failure

* Config schema: validate ACP binding channel and Telegram topic IDs

* Discord ACP: apply configured DM bindings to native commands

* ACP reset tails: dispatch through ACP after command handling

* ACP tails/native reset auth: fix target dispatch and restore full auth

* ACP reset detection: fallback to active ACP keys for DM contexts

* Tests: type runTurn mock input in ACP dispatch test

* ACP: dedup binding route bootstrap and reset target resolution

* reply: align ACP reset hooks with bound session key

* docs: replace personal discord ids with placeholders

* fix: add changelog entry for ACP persistent bindings (#34873) (thanks @dutifulbob)

---------

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

src/acp/conversation-id.ts

@@ -0,0 +1,80 @@
+export type ParsedTelegramTopicConversation = {
+  chatId: string;
+  topicId: string;
+  canonicalConversationId: string;
+};
+
+function normalizeText(value: unknown): string {
+  if (typeof value === "string") {
+    return value.trim();
+  }
+  if (typeof value === "number" || typeof value === "bigint" || typeof value === "boolean") {
+    return `${value}`.trim();
+  }
+  return "";
+}
+
+export function parseTelegramChatIdFromTarget(raw: unknown): string | undefined {
+  const text = normalizeText(raw);
+  if (!text) {
+    return undefined;
+  }
+  const match = text.match(/^telegram:(-?\d+)$/);
+  if (!match?.[1]) {
+    return undefined;
+  }
+  return match[1];
+}
+
+export function buildTelegramTopicConversationId(params: {
+  chatId: string;
+  topicId: string;
+}): string | null {
+  const chatId = params.chatId.trim();
+  const topicId = params.topicId.trim();
+  if (!/^-?\d+$/.test(chatId) || !/^\d+$/.test(topicId)) {
+    return null;
+  }
+  return `${chatId}:topic:${topicId}`;
+}
+
+export function parseTelegramTopicConversation(params: {
+  conversationId: string;
+  parentConversationId?: string;
+}): ParsedTelegramTopicConversation | null {
+  const conversation = params.conversationId.trim();
+  const directMatch = conversation.match(/^(-?\d+):topic:(\d+)$/);
+  if (directMatch?.[1] && directMatch[2]) {
+    const canonicalConversationId = buildTelegramTopicConversationId({
+      chatId: directMatch[1],
+      topicId: directMatch[2],
+    });
+    if (!canonicalConversationId) {
+      return null;
+    }
+    return {
+      chatId: directMatch[1],
+      topicId: directMatch[2],
+      canonicalConversationId,
+    };
+  }
+  if (!/^\d+$/.test(conversation)) {
+    return null;
+  }
+  const parent = params.parentConversationId?.trim();
+  if (!parent || !/^-?\d+$/.test(parent)) {
+    return null;
+  }
+  const canonicalConversationId = buildTelegramTopicConversationId({
+    chatId: parent,
+    topicId: conversation,
+  });
+  if (!canonicalConversationId) {
+    return null;
+  }
+  return {
+    chatId: parent,
+    topicId: conversation,
+    canonicalConversationId,
+  };
+}