Update router.py

router.py

@@ -32,12 +32,25 @@ def _get_sender_role(user_id: str) -> str:
     return "unknown"
 
 
+def _is_managed_channel(channel_id: str) -> bool:
+    """
+    Returns True if the message comes from a channel
+    that has at least one registered candidate.
+    """
+    candidates = sheets.get_active_candidates()
+    managed = {c.get("channel_id", "") for c in candidates if c.get("channel_id")}
+    # Also allow the default env channel for backwards compatibility
+    managed.add(os.environ.get("SLACK_CHANNEL_ID", ""))
+    return channel_id in managed
+
+
 def route_event(event: dict) -> None:
     """
-    Entry point for every Slack message event in #ai_vidya.
-    Called by the Slack event listener in main.py.
+    Entry point for every Slack message event.
+    Handles messages from any registered department channel.
     """
     user_id = event.get("user", "")
+    channel_id = event.get("channel", "")
 
     # Ignore bot messages (including our own)
     if event.get("bot_id") or event.get("subtype") == "bot_message":
@@ -48,6 +61,10 @@ def route_event(event: dict) -> None:
     if not text:
         return
 
+    # Only process messages from managed department channels
+    if not _is_managed_channel(channel_id):
+        return
+
     sender_role = _get_sender_role(user_id)
 
     if sender_role == "unknown":