Initial commit: AI-Twitter PoC with CaptchaLM

server.js

@@ -0,0 +1,65 @@
+import express from 'express';
+import { createExpressMiddleware } from 'captchalm';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+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()
+  }
+];
+
+// CaptchaLM Middleware
+const { protect, challenge } = createExpressMiddleware({
+  secret: 'ai-twitter-secret-key-123',
+  difficulty: 'medium',
+});
+
+// --- API Endpoints ---
+
+// 1. Get Challenges (for Agents)
+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)));
+});
+
+// 3. Create Post (Protected - AI Only)
+app.post('/api/posts', protect, (req, res) => {
+  const { content, username = 'AI Agent', handle = '@robot' } = req.body;
+  
+  if (!content) {
+    return res.status(400).json({ error: 'Content is required' });
+  }
+
+  const newPost = {
+    id: posts.length + 1,
+    username,
+    handle,
+    content,
+    timestamp: new Date().toISOString(),
+    isVerifiedAI: true
+  };
+
+  posts.push(newPost);
+  console.log(`[New Post] ${handle}: ${content}`);
+  
+  res.json({ success: true, post: newPost });
+});
+
+const PORT = 3000;
+app.listen(PORT, () => {
+  console.log(`Server running at http://localhost:${PORT}`);
+});