feat: Add customizable AI system prompt

src/App.jsx

@@ -1,5 +1,6 @@
 // 📦 Imports
 import React, { useState, useRef } from 'react';
+import SettingsModal from './SettingsModal';
 import ReactFlow, {
   Background,
   Controls,
@@ -16,6 +17,17 @@ import { saveAs } from 'file-saver';
 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) {
@@ -27,7 +39,7 @@ 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 +49,7 @@ 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 +98,7 @@ 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 +115,18 @@ export default function App() {
   const [edges, setEdges] = useState(initialEdges);
   const [prompt, setPrompt] = useState('');
   const [loading, setLoading] = useState(false);
+  const [isSettingsModalOpen, setIsSettingsModalOpen] = useState(false);
+  const [systemPrompt, setSystemPrompt] = useState(
+    localStorage.getItem('systemPrompt') || defaultSystemPrompt
+  );
   const stopGenerationRef = useRef(false);
   const reactFlowWrapper = useRef(null);
 
+  const handleSaveSystemPrompt = (newPrompt) => {
+    setSystemPrompt(newPrompt);
+    localStorage.setItem('systemPrompt', newPrompt);
+  };
+
   const handleExport = () => {
     if (reactFlowWrapper.current) {
       html2canvas(reactFlowWrapper.current).then((canvas) => {
@@ -150,7 +161,7 @@ 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);
@@ -164,12 +175,18 @@ 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);
   };
 
   return (
     <div style={{ height: '100vh', width: '100vw', backgroundColor: '#111', display: 'flex', flexDirection: 'column' }}>
+      <SettingsModal
+        isOpen={isSettingsModalOpen}
+        onClose={() => setIsSettingsModalOpen(false)}
+        systemPrompt={systemPrompt}
+        onSave={handleSaveSystemPrompt}
+      />
       {/* 🔝 Header */}
       <div style={{
         padding: '1rem 2rem',
@@ -184,7 +201,21 @@ export default function App() {
         </div>
 
         {/* 🔍 Prompt Input */}
-        <div style={{ display: 'flex', gap: '0.75rem' }}>
+        <div style={{ display: 'flex', gap: '0.75rem', alignItems: 'center' }}>
+        <button
+            onClick={() => setIsSettingsModalOpen(true)}
+            style={{
+              padding: '10px 20px',
+              backgroundColor: '#777',
+              color: 'white',
+              border: '1px solid #ccc',
+              borderRadius: '8px',
+              fontWeight: 'bold',
+              cursor: 'pointer',
+            }}
+          >
+            Settings
+          </button>
           <input
             type="text"
             value={prompt}

src/SettingsModal.jsx

@@ -0,0 +1,94 @@
+// 📦 Imports
+import React, { useState } from 'react';
+
+// ⚙️ SettingsModal Component
+export default function SettingsModal({
+  isOpen,
+  onClose,
+  systemPrompt,
+  onSave,
+}) {
+  const [prompt, setPrompt] = useState(systemPrompt);
+
+  const handleSave = () => {
+    onSave(prompt);
+    onClose();
+  };
+
+  if (!isOpen) {
+    return null;
+  }
+
+  return (
+    <div style={{
+      position: 'fixed',
+      top: 0,
+      left: 0,
+      right: 0,
+      bottom: 0,
+      backgroundColor: 'rgba(0, 0, 0, 0.7)',
+      display: 'flex',
+      alignItems: 'center',
+      justifyContent: 'center',
+      zIndex: 1000,
+    }}>
+      <div style={{
+        backgroundColor: '#333',
+        padding: '2rem',
+        borderRadius: '12px',
+        width: '500px',
+        color: '#fff',
+      }}>
+        <h2>Custom AI Instructions</h2>
+        <p style={{ color: '#ccc', fontSize: '0.9rem', marginBottom: '1rem' }}>
+          Tweak the AI's "system prompt" to change its behavior. For example, you could ask it to be a specific character, or to generate different kinds of ideas.
+        </p>
+        <textarea
+          value={prompt}
+          onChange={(e) => setPrompt(e.target.value)}
+          style={{
+            width: '100%',
+            height: '200px',
+            backgroundColor: '#222',
+            color: '#fff',
+            border: '1px solid #555',
+            borderRadius: '8px',
+            padding: '10px',
+            fontSize: '1rem',
+            marginBottom: '1rem',
+          }}
+        />
+        <div style={{ display: 'flex', justifyContent: 'flex-end', gap: '1rem' }}>
+          <button
+            onClick={onClose}
+            style={{
+              padding: '10px 20px',
+              backgroundColor: '#555',
+              color: 'white',
+              border: 'none',
+              borderRadius: '8px',
+              fontWeight: 'bold',
+              cursor: 'pointer',
+            }}
+          >
+            Cancel
+          </button>
+          <button
+            onClick={handleSave}
+            style={{
+              padding: '10px 20px',
+              backgroundColor: '#00bcd4',
+              color: 'white',
+              border: 'none',
+              borderRadius: '8px',
+              fontWeight: 'bold',
+              cursor: 'pointer',
+            }}
+          >
+            Save
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+}