Test-Driven Development (TDD)

Adapted from obra/superpowers — MIT. Stack-specific extensions for vitest (Next.js 15) + pytest (FastAPI).

The Iron Law

NO PRODUCTION CODE WITHOUT A FAILING TEST FIRST

Write code before the test? Delete it. Start over.

No exceptions:

• Don't keep it as "reference"
• Don't "adapt" it while writing tests
• Don't look at it
• Delete means delete

Implement fresh from tests. Period.