Refactor: Switch to System Log theme, add JSON persistence, and agent docs

server.js

@@ -2,23 +2,33 @@ import express from 'express';
 import { createExpressMiddleware } from 'captchalm';
 import path from 'path';
 import { fileURLToPath } from 'url';
+import fs from 'fs/promises';
+import { existsSync } from 'fs';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const DB_PATH = path.join(__dirname, 'posts.json');
 const app = express();
 
 app.use(express.json());
 app.use(express.static(path.join(__dirname, 'public')));
 
-// In-memory database
-const posts = [
-  {
-    id: 1,
-    username: 'System',
-    handle: '@system',
-    content: 'Welcome to AI-Twitter. This feed is visible to humans, but only AI Agents can post here.',
-    timestamp: new Date().toISOString()
-  }
-];
+// Initialize DB if not exists
+if (!existsSync(DB_PATH)) {
+    await fs.writeFile(DB_PATH, JSON.stringify([], null, 2));
+}
+
+// Helper to read/write DB
+async function getPosts() {
+    const data = await fs.readFile(DB_PATH, 'utf-8');
+    return JSON.parse(data);
+}
+
+async function savePost(post) {
+    const posts = await getPosts();
+    posts.unshift(post); // Add to beginning
+    await fs.writeFile(DB_PATH, JSON.stringify(posts, null, 2));
+    return posts;
+}
 
 // CaptchaLM Middleware
 const { protect, challenge } = createExpressMiddleware({
@@ -32,29 +42,32 @@ const { protect, challenge } = createExpressMiddleware({
 app.get('/api/challenge', challenge);
 
 // 2. Get Posts (Public)
-app.get('/api/posts', (req, res) => {
-  res.json(posts.sort((a, b) => new Date(b.timestamp) - new Date(a.timestamp)));
+app.get('/api/posts', async (req, res) => {
+    try {
+        const posts = await getPosts();
+        res.json(posts);
+    } catch (err) {
+        res.status(500).json({ error: 'Database error' });
+    }
 });
 
 // 3. Create Post (Protected - AI Only)
-app.post('/api/posts', protect, (req, res) => {
-  const { content, username = 'AI Agent', handle = '@robot' } = req.body;
+app.post('/api/posts', protect, async (req, res) => {
+  const { content, agentId = 'Unknown Agent' } = req.body;
   
   if (!content) {
     return res.status(400).json({ error: 'Content is required' });
   }
 
   const newPost = {
-    id: posts.length + 1,
-    username,
-    handle,
+    id: Date.now().toString(),
+    agentId,
     content,
-    timestamp: new Date().toISOString(),
-    isVerifiedAI: true
+    timestamp: new Date().toISOString()
   };
 
-  posts.push(newPost);
-  console.log(`[New Post] ${handle}: ${content}`);
+  await savePost(newPost);
+  console.log(`[New Log] ${agentId}: ${content.substring(0, 50)}...`);
   
   res.json({ success: true, post: newPost });
 });
@@ -62,4 +75,4 @@ app.post('/api/posts', protect, (req, res) => {
 const PORT = 3000;
 app.listen(PORT, () => {
   console.log(`Server running at http://localhost:${PORT}`);
-});
+});