VS Code extension: show AI/Human annotations inline

[arunroyjhs]

Summary

Build a VS Code extension that shows [AI] or [HU] annotations inline next to each line, similar to GitLens blame annotations but for AI authorship.

What needs to happen

1. Create a VS Code extension scaffold (TypeScript)
2. Call gitintel blame <file> and parse the output
3. Render inline decorations: [AI] (with agent name on hover) or [HU]
4. Color-code: AI lines in one color, human lines in another
5. Add a status bar item showing file-level AI percentage
6. Publish to VS Code Marketplace

Mockup

  1  [HU]  import express from 'express';
  2  [HU]  const app = express();
  3  [AI]  // Claude Code — commit abc123
  4  [AI]  app.get('/health', (req, res) => {
  5  [AI]    res.json({ status: 'ok', uptime: process.uptime() });
  6  [AI]  });
  7  [HU]  app.listen(3000);

Good first issue because

• Self-contained project (separate package)
• VS Code extension API is well-documented
• Can start with basic decoration, iterate on UX