Update app.py

app.py

@@ -224,21 +224,20 @@ def debug_cw():
 
 @app.route("/slack/events", methods=["POST"])
 def slack_events():
-    data = request.get_json()
+    data = request.get_json(force=True, silent=True) or {}
 
-    # URL verification handshake
+    # Slack URL verification
     if data.get("type") == "url_verification":
-        return jsonify({"challenge": data.get("challenge")})
+        return jsonify({"challenge": data["challenge"]})
 
-    # ── Deduplicate: drop retries of the same event ────────────────────────
-    event_id = data.get("event_id", "")
+    # Deduplicate Slack retries
+    event_id = data.get("event_id")
     if event_id and already_seen(event_id):
-        logger.info("Duplicate event %s — ignored", event_id)
+        logger.info(f"Duplicate event {event_id} ignored")
         return "", 200
 
-    # ── Return 200 immediately so Slack stops retrying ─────────────────────
-    thread = threading.Thread(target=handle_event, args=(data,), daemon=True)
-    thread.start()
+    # Process event in background thread
+    threading.Thread(target=handle_event, args=(data,), daemon=True).start()
 
     return "", 200