Fix race condition in message debouncer

Guard against empty debouncedMessages array which caused
"Cannot read properties of undefined (reading 'message_id')" error
when concurrent requests cleared the debouncer before retrieval.

Also add .wrangler and .turbo to biome ignore list.

Author: caelinsutch

apps/interaction-worker/src/services/loop/loop-message-inbound-handler.ts

@@ -25,7 +25,7 @@ const waitFor = (ms: number): Promise<void> =>
 export const handleMessageInbound = async (
   options: MessageInboundHandlerOptions,
 ): Promise<void> => {
-  const { payload, doNamespace, db, ctx, env } = options;
+  const { payload, doNamespace, db, env } = options;
 
   if (payload.alert_type !== "message_inbound") {
     throw new Error(
@@ -65,6 +65,18 @@ export const handleMessageInbound = async (
     messageIds: debouncedMessages.map((m) => m.message_id),
   });
 
+  // Guard against empty debounced messages (race condition or cleared state)
+  if (debouncedMessages.length === 0) {
+    logger.warn(
+      "Debounced messages empty - possible race condition or cleared state",
+      {
+        conversationId,
+        currentMessageId: payload.message_id,
+      },
+    );
+    return;
+  }
+
   // Check if we're the last message (should process)
   const lastMessage = debouncedMessages[debouncedMessages.length - 1];
 

biome.json

@@ -6,7 +6,8 @@
     "useIgnoreFile": false
   },
   "files": {
-    "ignoreUnknown": false
+    "ignoreUnknown": false,
+    "includes": ["**", "!.wrangler", "!.turbo"]
   },
   "formatter": {
     "enabled": true,