PrepmatrixAI for VS Code and Cursor

Practice and take-home coding review in your own editor. Select code, get an interview walkthrough: approach, complexity, issues, and a speakable answer.

This extension does not sit on HireVue, CodeSignal, or HackerRank. The coach panel is an ordinary editor view. It will appear if you share the window.

Install

PrepmatrixAI on the Visual Studio Marketplace — in VS Code or Cursor, open Extensions and search PrepmatrixAI, or:

ext install PrepmatrixAI.prepmatrixai

To package from this repo instead:

npm run editor:package

Then Extensions → Install from VSIX on vscode-extension/prepmatrixai-0.1.1.vsix.

Sign in

1. Command Palette → PrepmatrixAI: Sign in
2. API origin: http://127.0.0.1:8013 locally, or https://prepmatrixai-live.onrender.com when using the hosted live API
3. Local API token — PREPMATRIX_LOCAL_AUTH_TOKEN from backend/.env
4. Firebase ID token — on the desk, Practice Studio → Copy editor token. It expires in about an hour.

The token is stored in the editor's secret storage, not in settings.json.

Commands

Answers land in the PrepmatrixAI activity-bar panel.

What it calls

GET /api/editor/status and POST /api/editor/review on the PrepmatrixAI realtime API. Same auth as the desk: x-prepmatrix-token or Authorization: Bearer.