refactor: centralize group sender identity

extensions/matrix/src/matrix/monitor/index.ts

@@ -328,20 +328,21 @@ export async function monitorMatrixProvider(opts: MonitorMatrixOpts = {}): Promi
 
       const messageId = event.getId() ?? "";
       const threadRootId = resolveMatrixThreadRootId({ event, content });
-      const threadTarget = resolveMatrixThreadTarget({
-        threadReplies,
-        messageId,
-        threadRootId,
-        isThreadRoot: event.isThreadRoot,
-      });
+	      const threadTarget = resolveMatrixThreadTarget({
+	        threadReplies,
+	        messageId,
+	        threadRootId,
+	        isThreadRoot: event.isThreadRoot,
+	      });
 
-      const textWithId = `${bodyText}\n[matrix event id: ${messageId} room: ${roomId}]`;
-      const body = formatAgentEnvelope({
-        channel: "Matrix",
-        from: senderName,
-        timestamp: event.getTs() ?? undefined,
-        body: textWithId,
-      });
+	      const envelopeFrom = isDirectMessage ? senderName : (roomName ?? roomId);
+	      const textWithId = `${bodyText}\n[matrix event id: ${messageId} room: ${roomId}]`;
+	      const body = formatAgentEnvelope({
+	        channel: "Matrix",
+	        from: envelopeFrom,
+	        timestamp: event.getTs() ?? undefined,
+	        body: textWithId,
+	      });
 
       const route = resolveAgentRoute({
         cfg,

extensions/msteams/src/monitor-handler/message-handler.ts

@@ -352,15 +352,16 @@ export function createMSTeamsMessageHandler(deps: MSTeamsMessageHandlerDeps) {
         channelData: activity.channelData,
       },
       log,
-    });
+	    });
 
-    const mediaPayload = buildMSTeamsMediaPayload(mediaList);
-    const body = formatAgentEnvelope({
-      channel: "Teams",
-      from: senderName,
-      timestamp,
-      body: rawBody,
-    });
+	    const mediaPayload = buildMSTeamsMediaPayload(mediaList);
+	    const envelopeFrom = isDirectMessage ? senderName : conversationType;
+	    const body = formatAgentEnvelope({
+	      channel: "Teams",
+	      from: envelopeFrom,
+	      timestamp,
+	      body: rawBody,
+	    });
     let combinedBody = body;
     const isRoomish = !isDirectMessage;
     const historyKey = isRoomish ? conversationId : undefined;

extensions/zalo/src/monitor.ts

@@ -495,13 +495,13 @@ async function processMessageWithPipeline(params: {
     },
   });
 
-  const rawBody = text?.trim() || (mediaPath ? "<media:image>" : "");
-  const fromLabel = isGroup
-    ? `group:${chatId} from ${senderName || senderId}`
-    : senderName || `user:${senderId}`;
-  const body = deps.formatAgentEnvelope({
-    channel: "Zalo",
-    from: fromLabel,
+	  const rawBody = text?.trim() || (mediaPath ? "<media:image>" : "");
+	  const fromLabel = isGroup
+	    ? `group:${chatId}`
+	    : senderName || `user:${senderId}`;
+	  const body = deps.formatAgentEnvelope({
+	    channel: "Zalo",
+	    from: fromLabel,
     timestamp: date ? date * 1000 : undefined,
     body: rawBody,
   });

extensions/zalouser/src/monitor.ts

@@ -170,13 +170,13 @@ async function processMessage(
     },
   });
 
-  const rawBody = content.trim();
-  const fromLabel = isGroup
-    ? `group:${chatId} from ${senderName || senderId}`
-    : senderName || `user:${senderId}`;
-  const body = deps.formatAgentEnvelope({
-    channel: "Zalo Personal",
-    from: fromLabel,
+	  const rawBody = content.trim();
+	  const fromLabel = isGroup
+	    ? `group:${chatId}`
+	    : senderName || `user:${senderId}`;
+	  const body = deps.formatAgentEnvelope({
+	    channel: "Zalo Personal",
+	    from: fromLabel,
     timestamp: timestamp ? timestamp * 1000 : undefined,
     body: rawBody,
   });