diff --git a/backend/apps/settings/models.py b/backend/apps/settings/models.py
index 7eb6bbb0..fe7d6b07 100644
--- a/backend/apps/settings/models.py
+++ b/backend/apps/settings/models.py
@@ -3,21 +3,31 @@ from typing import Optional, Any
 
 DEFAULT_SYSTEM_PROMPT = (
     "You are a personal AI assistant running inside OpenSwarm.\n\n"
+    "## Core Behavior\n"
+    "Act, don't ask. When a tool can accomplish the task, call it immediately — "
+    "do not describe what you would do, do not ask for confirmation, just execute. "
+    "The user expects results, not plans.\n"
+    "If ANY available tool is relevant to the user's request, use it. Never respond "
+    'with "I can do X for you" or "Would you like me to..." — just do it. '
+    "A tool call is always better than a text explanation of what the tool would do.\n"
+    "For multi-step tasks, chain tool calls in sequence — don't stop after one step "
+    "to ask if you should continue. Complete the entire task, then report the results.\n"
+    "Be adaptable. If one approach fails, try a different tool or strategy instead of "
+    "giving up or repeating the same action. Always stay focused on what the user "
+    "actually wants to accomplish — their intent matters more than the specific method.\n\n"
     "## Tool Priority\n"
-    "ALWAYS use MCP tools when they can handle the task. NEVER use the browser or WebSearch for something a connected MCP tool can do.\n"
-    "1. MCP tools — MUST be used when available and capable. They are faster, more reliable, and purpose-built.\n"
-    "2. WebSearch / WebFetch — only when no MCP tool covers the task\n"
-    "3. BrowserAgent — last resort, only when you need to visually interact with a website, fill forms, or do something no other tool can handle\n\n"
-    "## Tool Call Style\n"
-    "Default: do not narrate routine tool calls — just call the tool.\n"
-    "Narrate only when it helps: multi-step work, complex problems, or when the user explicitly asks.\n"
-    "Keep narration brief. Use plain language.\n\n"
-    "## Interaction Style\n"
-    "Be direct and action-oriented. Do not ask clarifying questions unless genuinely ambiguous — "
-    "make reasonable assumptions and act.\n"
-    "If you ever need to ask the user a question, you MUST use the AskUserQuestion tool. "
-    "Never ask questions inline in plain text — always go through AskUserQuestion.\n"
-    "Do not over-explain what you are about to do. Just do it and show the results.\n"
+    "1. Connected MCP tools — fastest and most reliable. Use ToolSearch to discover "
+    "what integrations are available if you're unsure.\n"
+    "2. WebSearch / WebFetch — for general web lookups when no MCP tool fits.\n"
+    "3. BrowserAgent — last resort, only for visual interaction with websites, "
+    "filling forms, or tasks no other tool can handle.\n\n"
+    "## Style\n"
+    "Do not narrate routine tool calls — just call the tool.\n"
+    "After tool calls complete, present the results directly. Do not recap which "
+    "tools you called or why — the user can see tool calls in the UI.\n"
+    "Keep responses brief and direct. Use plain language.\n"
+    "If you genuinely need clarification on something ambiguous, use the "
+    "AskUserQuestion tool. Never ask questions inline in plain text.\n"
 )
 
 
diff --git a/electron/main.js b/electron/main.js
index a0edf6ca..c28dc4c4 100644
--- a/electron/main.js
+++ b/electron/main.js
@@ -8,6 +8,22 @@ const fs = require('fs');
 const getPort = require('get-port');
 const http = require('http');
 
+// Prevent duplicate instances. Without this, double-clicking the app icon
+// (or macOS auto-launch + manual launch overlapping) spawns two independent
+// processes — each with its own backend on a different port — resulting in
+// one populated window and one empty window.
+const gotLock = app.requestSingleInstanceLock();
+if (!gotLock) {
+  app.quit();
+} else {
+  app.on('second-instance', () => {
+    if (mainWindow) {
+      if (mainWindow.isMinimized()) mainWindow.restore();
+      mainWindow.focus();
+    }
+  });
+}
+
 app.commandLine.appendSwitch('disable-features', 'HardwareMediaKeyHandling');
 app.commandLine.appendSwitch('ignore-gpu-blocklist');
 app.commandLine.appendSwitch('enable-gpu-rasterization');