fix: require triggers for paired bot messages

src/message-runtime.ts

@@ -126,6 +126,21 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
       channel?.isOwnMessage?.bind(channel),
     );
 
+  const filterTriggeredPairedBotMessages = (
+    chatJid: string,
+    messages: Parameters<typeof filterProcessableMessages>[0],
+  ) => {
+    if (!isPairedRoomJid(chatJid)) return messages;
+
+    // In paired rooms, require an explicit trigger before reacting to another
+    // bot's message. This keeps the room usable without reintroducing bot loops.
+    return messages.filter(
+      (message) =>
+        !message.is_bot_message ||
+        deps.triggerPattern.test(message.content.trim()),
+    );
+  };
+
   const deliverOpenWorkItem = async (
     channel: Channel,
     item: WorkItem,
@@ -575,10 +590,9 @@ export function createMessageRuntime(deps: MessageRuntimeDeps): {
         sinceSeqCursor,
         deps.assistantName,
       );
-      const missedMessages = getProcessableMessages(
+      const missedMessages = filterTriggeredPairedBotMessages(
         chatJid,
-        rawMissedMessages,
-        channel,
+        getProcessableMessages(chatJid, rawMissedMessages, channel),
       );
 
       if (missedMessages.length === 0) {