auto-reply: support multi-text RPC outputs

src/agents/pi.ts

@@ -13,36 +13,50 @@ type PiAssistantMessage = {
 
 function parsePiJson(raw: string): AgentParseResult {
   const lines = raw.split(/\n+/).filter((l) => l.trim().startsWith("{"));
-  let lastMessage: PiAssistantMessage | undefined;
+
+  // Collect every assistant message we see; Tau in RPC mode can emit multiple
+  // assistant payloads in one run (e.g., queued turns, heartbeats). We concatenate
+  // all text blocks so users see everything instead of only the last message_end.
+  const texts: string[] = [];
+  let lastAssistant: PiAssistantMessage | undefined;
+
   for (const line of lines) {
     try {
       const ev = JSON.parse(line) as {
         type?: string;
         message?: PiAssistantMessage;
       };
-      // Pi emits a stream; we only care about the terminal assistant message_end.
-      if (ev.type === "message_end" && ev.message?.role === "assistant") {
-        lastMessage = ev.message;
+      const msg = ev.message;
+      if (msg?.role === "assistant" && Array.isArray(msg.content)) {
+        const msgText = msg.content
+          .filter((c) => c?.type === "text" && typeof c.text === "string")
+          .map((c) => c.text)
+          .join("\n")
+          .trim();
+        if (msgText) texts.push(msgText);
+        // keep meta from the most recent assistant message
+        lastAssistant = msg;
       }
     } catch {
-      // ignore
+      // ignore malformed lines
     }
   }
-  const text =
-    lastMessage?.content
-      ?.filter((c) => c?.type === "text" && typeof c.text === "string")
-      .map((c) => c.text)
-      .join("\n")
-      ?.trim() ?? undefined;
-  const meta: AgentMeta | undefined = lastMessage
-    ? {
-        model: lastMessage.model,
-        provider: lastMessage.provider,
-        stopReason: lastMessage.stopReason,
-        usage: lastMessage.usage,
-      }
-    : undefined;
-  return { text, meta };
+
+  // Combine all assistant text messages (ignore tool calls/partials). This keeps
+  // multi-message replies intact while dropping non-text events.
+  const text = texts.length ? texts.join("\n\n").trim() : undefined;
+
+  const meta: AgentMeta | undefined =
+    text && lastAssistant
+      ? {
+          model: lastAssistant.model,
+          provider: lastAssistant.provider,
+          stopReason: lastAssistant.stopReason,
+          usage: lastAssistant.usage,
+        }
+      : undefined;
+
+  return { texts, meta };
 }
 
 export const piSpec: AgentSpec = {