## Review

_Congratulations, you've completed this exercise!_

You built and modernized a **multi-tier application** using GitHub Copilot agent mode.

### What you accomplished

- Prepared a Codespaces environment for a multi-tier application.
- Implemented a React 19 presentation tier.
- Built a Node.js + Express + TypeScript logic tier.
- Connected a MongoDB data tier with Mongoose.
- Practiced pull request summarization and review with Copilot.

### What's next?

- Add authentication and role-based authorization.
- Add tests for API routes and React components.
- Add CI checks for linting and automated tests.
- Explore other GitHub Skills exercises.