coderdevang · google-labs-jules · Jan 16, 2026
diff --git a/src/App.jsx b/src/App.jsx
@@ -1,5 +1,5 @@
 // 📦 Imports
-import React, { useState, useRef } from 'react';
+import React, { useState, useRef, useEffect } from 'react';
 import ReactFlow, {
   Background,
   Controls,
@@ -11,12 +11,25 @@ import 'reactflow/dist/style.css';
 import axios from 'axios';
 import html2canvas from 'html2canvas';
 import { saveAs } from 'file-saver';
+import SettingsModal from './SettingsModal';
 
 // 🧠 Initial State & Helpers
 const initialNodes = [];
 const initialEdges = [];
 let nodeId = 1;
 
+const defaultSystemPrompt = `You are an expert in cause-and-effect analysis.
+
+Given a news headline or event, break it down into a chain of consequences, like a domino effect.
+
+Each node must:
+- Be short (max 15 words)
+- Represent one specific consequence
+- Be categorized as either: 'positive', 'neutral', or 'negative'
+- Be logically linked to the prompt
+
+Return only 3 outputs: one of each type.`;
+
 const getColor = (type) => {
   switch (type) {
     case 'positive': return '#00c853';
@@ -27,7 +40,7 @@ const getColor = (type) => {
 };
 
 // 🤖 AI Logic with Domino Effect Thinking (Updated: Using Puter AI API)
-const createAIChildren = async (text, parentId, setNodes, setEdges, stopGenerationRef) => {
+const createAIChildren = async (text, parentId, setNodes, setEdges, stopGenerationRef, systemPrompt) => {
   try {
     if (stopGenerationRef.current) return;
     const res = await axios.post(
@@ -37,17 +50,7 @@ const createAIChildren = async (text, parentId, setNodes, setEdges, stopGenerati
         messages: [
           {
             role: 'system',
-            content: `You are an expert in cause-and-effect analysis.
-
-Given a news headline or event, break it down into a chain of consequences, like a domino effect.
-
-Each node must:
-- Be short (max 15 words)
-- Represent one specific consequence
-- Be categorized as either: 'positive', 'neutral', or 'negative'
-- Be logically linked to the prompt
-
-Return only 3 outputs: one of each type.`
+            content: systemPrompt,
           },
           { role: 'user', content: text }
         ]
@@ -96,7 +99,7 @@ Return only 3 outputs: one of each type.`
     // Recursively expand each child one level deep
     for (const n of newNodes) {
       if (stopGenerationRef.current) break;
-      await createAIChildren(n.data.label, n.id, setNodes, setEdges, stopGenerationRef);
+      await createAIChildren(n.data.label, n.id, setNodes, setEdges, stopGenerationRef, systemPrompt);
     }
 
   } catch (err) {
@@ -113,9 +116,20 @@ export default function App() {
   const [edges, setEdges] = useState(initialEdges);
   const [prompt, setPrompt] = useState('');
   const [loading, setLoading] = useState(false);
+  const [isSettingsOpen, setIsSettingsOpen] = useState(false);
+  const [systemPrompt, setSystemPrompt] = useState(defaultSystemPrompt);
+  const [tempPrompt, setTempPrompt] = useState(systemPrompt);
   const stopGenerationRef = useRef(false);
   const reactFlowWrapper = useRef(null);
 
+  useEffect(() => {
+    const storedPrompt = localStorage.getItem('systemPrompt');
+    if (storedPrompt) {
+      setSystemPrompt(storedPrompt);
+      setTempPrompt(storedPrompt);
+    }
+  }, []);
+
   const handleExport = () => {
     if (reactFlowWrapper.current) {
       html2canvas(reactFlowWrapper.current).then((canvas) => {
@@ -150,7 +164,7 @@ export default function App() {
     setNodes([rootNode]);
     setEdges([]);
 
-    await createAIChildren(prompt, rootId, setNodes, setEdges, stopGenerationRef);
+    await createAIChildren(prompt, rootId, setNodes, setEdges, stopGenerationRef, systemPrompt);
 
     setPrompt('');
     setLoading(false);
@@ -164,10 +178,20 @@ export default function App() {
   const onNodeClick = async (_event, node) => {
     stopGenerationRef.current = false;
     setLoading(true);
-    await createAIChildren(node.data.label, node.id, setNodes, setEdges, stopGenerationRef);
+    await createAIChildren(node.data.label, node.id, setNodes, setEdges, stopGenerationRef, systemPrompt);
     setLoading(false);
   };
 
+  const handleSavePrompt = () => {
+    setSystemPrompt(tempPrompt);
+    localStorage.setItem('systemPrompt', tempPrompt);
+    setIsSettingsOpen(false);
+  };
+
+  const handleRestoreDefault = () => {
+    setTempPrompt(defaultSystemPrompt);
+  };
+
   return (
     <div style={{ height: '100vh', width: '100vw', backgroundColor: '#111', display: 'flex', flexDirection: 'column' }}>
       {/* 🔝 Header */}
@@ -246,6 +270,20 @@ export default function App() {
           >
             Export as PNG
           </button>
+          <button
+            onClick={() => setIsSettingsOpen(true)}
+            style={{
+              padding: '10px 20px',
+              backgroundColor: '#666',
+              color: 'white',
+              border: 'none',
+              borderRadius: '8px',
+              fontWeight: 'bold',
+              cursor: 'pointer',
+            }}
+          >
+            Settings
+          </button>
         </div>
       </div>
 
@@ -265,6 +303,15 @@ export default function App() {
           <Background variant="dots" gap={12} size={1} />
         </ReactFlow>
       </div>
+
+      <SettingsModal
+        isOpen={isSettingsOpen}
+        onClose={() => setIsSettingsOpen(false)}
+        systemPrompt={tempPrompt}
+        setSystemPrompt={setTempPrompt}
+        handleSave={handleSavePrompt}
+        handleRestoreDefault={handleRestoreDefault}
+      />
     </div>
   );
 }
diff --git a/src/SettingsModal.jsx b/src/SettingsModal.jsx
@@ -0,0 +1,110 @@
+// ⚙️ SettingsModal.jsx
+import React from 'react';
+
+const SettingsModal = ({ isOpen, onClose, systemPrompt, setSystemPrompt, handleSave, handleRestoreDefault }) => {
+  if (!isOpen) return null;
+
+  return (
+    <div style={styles.overlay}>
+      <div style={styles.modal}>
+        <h2 style={styles.title}>Settings</h2>
+        <p style={styles.description}>
+          Customize the AI's instructions to tailor its responses for your specific needs.
+        </p>
+        <textarea
+          value={systemPrompt}
+          onChange={(e) => setSystemPrompt(e.target.value)}
+          style={styles.textarea}
+        />
+        <div style={styles.buttonContainer}>
+          <button onClick={handleSave} style={styles.saveButton}>
+            Save
+          </button>
+          <button onClick={handleRestoreDefault} style={styles.restoreButton}>
+            Restore Default
+          </button>
+          <button onClick={onClose} style={styles.closeButton}>
+            Close
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+};
+
+// 🎨 Styles
+const styles = {
+  overlay: {
+    position: 'fixed',
+    top: 0,
+    left: 0,
+    right: 0,
+    bottom: 0,
+    backgroundColor: 'rgba(0, 0, 0, 0.7)',
+    display: 'flex',
+    justifyContent: 'center',
+    alignItems: 'center',
+    zIndex: 1000,
+  },
+  modal: {
+    backgroundColor: '#333',
+    padding: '2rem',
+    borderRadius: '12px',
+    width: '500px',
+    boxShadow: '0 5px 15px rgba(0, 0, 0, 0.5)',
+    color: '#fff',
+  },
+  title: {
+    margin: '0 0 1rem 0',
+  },
+  description: {
+    margin: '0 0 1.5rem 0',
+    color: '#ccc',
+  },
+  textarea: {
+    width: '100%',
+    height: '150px',
+    padding: '10px',
+    borderRadius: '8px',
+    border: '1px solid #555',
+    backgroundColor: '#222',
+    color: '#fff',
+    fontSize: '14px',
+    resize: 'vertical',
+  },
+  buttonContainer: {
+    display: 'flex',
+    justifyContent: 'flex-end',
+    marginTop: '1.5rem',
+    gap: '0.75rem',
+  },
+  saveButton: {
+    padding: '10px 20px',
+    backgroundColor: '#00bcd4',
+    color: '#fff',
+    border: 'none',
+    borderRadius: '8px',
+    fontWeight: 'bold',
+    cursor: 'pointer',
+  },
+  restoreButton: {
+    padding: '10px 20px',
+    backgroundColor: '#ff9800',
+    color: '#fff',
+    border: 'none',
+    borderRadius: '8px',
+    fontWeight: 'bold',
+    cursor: 'pointer',
+  },
+  closeButton: {
+    padding: '10px 20px',
+    backgroundColor: '#555',
+    color: '#fff',
+    border: 'none',
+    borderRadius: '8px',
+    fontWeight: 'bold',
+    cursor: 'pointer',
+  },
+};
+
+export default SettingsModal;