fix(telegram): honor session activation overrides

CHANGELOG.md

@@ -48,6 +48,7 @@
 - Telegram: include sender identity in group envelope headers. (#336)
 - Telegram: support forum topics with topic-isolated sessions and message_thread_id routing. Thanks @HazAT, @nachoiacovino, @RandyVentures for PR #321/#333/#334.
 - Telegram: add draft streaming via `sendMessageDraft` with `telegram.streamMode`, plus `/reasoning stream` for draft-only reasoning.
+- Telegram: honor `/activation` session mode for group mention gating and clarify group activation docs. Thanks @julianengel for PR #377.
 - iMessage: ignore disconnect errors during shutdown (avoid unhandled promise rejections). Thanks @antons for PR #359.
 - Messages: stop defaulting ack reactions to 👀 when identity emoji is missing.
 - Auto-reply: require slash for control commands to avoid false triggers in normal text.

src/telegram/bot.ts

@@ -860,7 +860,7 @@ export function createTelegramBot(opts: TelegramBotOptions) {
             kind: isGroup ? "group" : "dm",
             id: isGroup
               ? buildTelegramGroupPeerId(chatId, messageThreadId)
-              : buildTelegramDmPeerId(chatId, messageThreadId),
+              : String(chatId),
           },
         });
         const skillFilter = firstDefined(
@@ -1251,15 +1251,6 @@ function buildTelegramGroupPeerId(
     : String(chatId);
 }
 
-function buildTelegramDmPeerId(
-  chatId: number | string,
-  messageThreadId?: number,
-) {
-  return messageThreadId != null
-    ? `${chatId}:topic:${messageThreadId}`
-    : String(chatId);
-}
-
 function buildTelegramGroupFrom(
   chatId: number | string,
   messageThreadId?: number,