also no idea, from monorepo

src/apps/officer-web/Screens/Dashboard/Chat/usePiMono.ts

@@ -1,10 +1,7 @@
 import { useState, useEffect, useRef } from 'react';
 import { useChatWebSocket } from 'hooks/useChatWebSocket';
-import { useChatSessions } from '@/state/useChatSessions';
 import type { ChatMessage, ServerMessage, TaskInfo } from 'apps/Chat';
 
-const SAVE_DEBOUNCE_MS = 1000;
-
 type UsePiMonoOptions = {
   replaceUrl?: boolean;
   taskInfo?: TaskInfo;
@@ -22,9 +19,6 @@ export const usePiMono = (initialSessionId?: string, initialModel?: string | nul
   const streamingRef = useRef('');
   const rafRef = useRef<number | null>(null);
   const sessionIdRef = useRef<string | null>(initialSessionId ?? null);
-  const saveTimerRef = useRef<number | null>(null);
-
-  const { getMessages, saveMessages } = useChatSessions();
 
   const token = localStorage.getItem('BEARER_TOKEN');
   const protocol = window.location.protocol === 'https:' ? 'wss:' : 'ws:';
@@ -56,8 +50,11 @@ export const usePiMono = (initialSessionId?: string, initialModel?: string | nul
         if (replaceUrl) window.history.replaceState(null, '', `/chat/${msg.sessionId}`);
         break;
 
-      case 'system:prompt':
-        setMessages((prev) => [...prev, { role: 'system', text: msg.text }]);
+      case 'messages:sync':
+        setMessages(msg.messages);
+        streamingRef.current = msg.streamingText;
+        setStreamingText(msg.streamingText);
+        setIsGenerating(msg.isGenerating);
         break;
 
       case 'assistant:partial':
@@ -125,37 +122,6 @@ export const usePiMono = (initialSessionId?: string, initialModel?: string | nul
     }
   }, [isConnected, initialSessionId]);
 
-  // Load messages from server on mount when resuming a session
-  useEffect(() => {
-    if (!initialSessionId) return;
-    getMessages('pi-mono', initialSessionId)
-      .then((data) => {
-        if (Array.isArray(data) && data.length > 0) setMessages(data);
-      })
-      .catch(() => {});
-  }, [initialSessionId]);
-
-  // Debounced save messages to server
-  useEffect(() => {
-    if (!sessionIdRef.current || messages.length === 0) return;
-
-    if (saveTimerRef.current !== null) clearTimeout(saveTimerRef.current);
-
-    const sid = sessionIdRef.current;
-    const snapshot = messages;
-    saveTimerRef.current = window.setTimeout(() => {
-      saveMessages('pi-mono', sid, snapshot).catch(() => {});
-      saveTimerRef.current = null;
-    }, SAVE_DEBOUNCE_MS);
-
-    return () => {
-      if (saveTimerRef.current !== null) {
-        clearTimeout(saveTimerRef.current);
-        saveTimerRef.current = null;
-      }
-    };
-  }, [messages]);
-
   // Clean up RAF on unmount
   useEffect(() => {
     return () => {
@@ -184,7 +150,7 @@ export const usePiMono = (initialSessionId?: string, initialModel?: string | nul
     send({
       type: 'chat',
       prompt: text,
-      sessionId: sessionIdRef.current,
+      ...(sessionIdRef.current ? { sessionId: sessionIdRef.current } : {}),
       ...(selectedModel ? { model: selectedModel } : {}),
       ...(cwd ? { cwd } : {}),
       ...(attachmentIds?.length ? { attachmentIds } : {}),