Add all backend files

.env.example

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+STRIPE_SECRET_KEY=sk_test_your_key_here
+STRIPE_WEBHOOK_SECRET=whsec_your_secret_here
+GITHUB_TOKEN=ghp_your_token_here
+BASE_URL=https://context-bridge-ten.vercel.app
+PORT=3000

.gitignore

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-.vercel
+node_modules/
+.env

.vercel/README.txt

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+> Why do I have a folder named ".vercel" in my project?
+The ".vercel" folder is created when you link a directory to a Vercel project.
+
+> What does the "project.json" file contain?
+The "project.json" file contains:
+- The ID of the Vercel project that you linked ("projectId")
+- The ID of the user or team your Vercel project is owned by ("orgId")
+
+> Should I commit the ".vercel" folder?
+No, you should not share the ".vercel" folder with anyone.
+Upon creation, it will be automatically added to your ".gitignore" file.

.vercel/project.json

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+{"projectId":"prj_KL07uJYKBqS1Wpl6qrvpCPa5b7V9","orgId":"team_TRzkNju2fGETspZKM2AkELHe","projectName":"context-bridge"}

package.json

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+{
+  "name": "context-bridge",
+  "version": "1.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node server.js",
+    "dev": "nodemon server.js"
+  },
+  "dependencies": {
+    "express": "^4.18.2",
+    "stripe": "^14.0.0",
+    "@octokit/rest": "^20.0.2"
+  },
+  "devDependencies": {
+    "nodemon": "^3.0.2"
+  }
+}

server.js

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+const express = require('express');
+const Stripe = require('stripe');
+const { Octokit } = require('@octokit/rest');
+
+const app = express();
+const stripe = Stripe(process.env.STRIPE_SECRET_KEY);
+const octokit = new Octokit({ auth: process.env.GITHUB_TOKEN });
+
+app.use(express.json());
+app.use(express.static('public'));
+
+// Create context gist for user
+app.post('/api/create-context', async (req, res) => {
+  const { email, name } = req.body;
+  
+  const contextTemplate = `# ${name}'s Context
+
+**Last Updated**: ${new Date().toISOString()}
+**Email**: ${email}
+
+## Current Work
+
+[Add what you're working on]
+
+## Active Projects
+
+- [Project 1]
+- [Project 2]
+
+## Context for AI Assistants
+
+When starting a conversation, I'm currently focused on: [Fill this in]
+
+## Instructions
+
+Give this URL to any AI assistant: [This gist URL]
+Update using: gh gist edit [gist-id] CURRENT_CONTEXT.md
+`;
+
+  try {
+    const gist = await octokit.gists.create({
+      description: `${name}'s Context Bridge`,
+      public: true,
+      files: {
+        'CURRENT_CONTEXT.md': {
+          content: contextTemplate
+        }
+      }
+    });
+
+    res.json({ 
+      gistUrl: gist.data.html_url,
+      gistId: gist.data.id,
+      rawUrl: gist.data.files['CURRENT_CONTEXT.md'].raw_url
+    });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Create Stripe checkout
+app.post('/api/create-checkout', async (req, res) => {
+  const { email, priceId } = req.body;
+  
+  try {
+    const session = await stripe.checkout.sessions.create({
+      payment_method_types: ['card'],
+      line_items: [{
+        price: priceId,
+        quantity: 1,
+      }],
+      mode: 'subscription',
+      success_url: `${process.env.BASE_URL}/success?session_id={CHECKOUT_SESSION_ID}`,
+      cancel_url: `${process.env.BASE_URL}/`,
+      customer_email: email,
+    });
+
+    res.json({ url: session.url });
+  } catch (error) {
+    res.status(500).json({ error: error.message });
+  }
+});
+
+// Webhook handler
+app.post('/api/webhook', express.raw({ type: 'application/json' }), async (req, res) => {
+  const sig = req.headers['stripe-signature'];
+  
+  try {
+    const event = stripe.webhooks.constructEvent(req.body, sig, process.env.STRIPE_WEBHOOK_SECRET);
+    
+    if (event.type === 'checkout.session.completed') {
+      const session = event.data.object;
+      // Create gist for customer
+      // Send welcome email with gist URL
+    }
+    
+    res.json({ received: true });
+  } catch (error) {
+    res.status(400).send(`Webhook Error: ${error.message}`);
+  }
+});
+
+const PORT = process.env.PORT || 3000;
+app.listen(PORT, () => console.log(`Server running on port ${PORT}`));

success.html

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Success - Context Bridge</title>
+    <style>
+        body {
+            font-family: Georgia, Times, serif;
+            max-width: 700px;
+            margin: 50px auto;
+            padding: 20px;
+            line-height: 1.6;
+        }
+        .success-box {
+            border: 2px solid #0645ad;
+            padding: 30px;
+            background: #f8f9fa;
+        }
+        h1 {
+            color: #0645ad;
+            border-bottom: 1px solid #a2a9b1;
+            padding-bottom: 10px;
+        }
+        code {
+            background: #eee;
+            padding: 2px 6px;
+            border-radius: 3px;
+            font-family: monospace;
+        }
+        .gist-url {
+            background: #fff;
+            border: 1px solid #a2a9b1;
+            padding: 15px;
+            margin: 20px 0;
+            font-family: monospace;
+            word-break: break-all;
+        }
+    </style>
+</head>
+<body>
+    <div class="success-box">
+        <h1>Welcome to Context Bridge!</h1>
+        
+        <p><strong>Your context file has been created.</strong></p>
+        
+        <div class="gist-url" id="gist-url">Loading your context URL...</div>
+        
+        <h2>How to use it</h2>
+        
+        <ol>
+            <li>Copy the URL above</li>
+            <li>When starting any AI conversation, say: <code>Read [your URL] first</code></li>
+            <li>The AI will understand your context immediately</li>
+            <li>Update your context anytime: <code>gh gist edit [gist-id] CURRENT_CONTEXT.md</code></li>
+        </ol>
+        
+        <h2>Next steps</h2>
+        
+        <ul>
+            <li>Edit your context file to add your current projects</li>
+            <li>Try it with Claude, ChatGPT, or GitHub Copilot</li>
+            <li>Update weekly (or whenever your focus changes)</li>
+        </ul>
+        
+        <p><a href="/">← Back to home</a></p>
+    </div>
+    
+    <script>
+        const urlParams = new URLSearchParams(window.location.search);
+        const sessionId = urlParams.get('session_id');
+        
+        if (sessionId) {
+            fetch(`/api/get-context?session=${sessionId}`)
+                .then(r => r.json())
+                .then(data => {
+                    document.getElementById('gist-url').textContent = data.gistUrl;
+                })
+                .catch(() => {
+                    document.getElementById('gist-url').textContent = 'Check your email for your context URL';
+                });
+        }
+    </script>
+</body>
+</html>