TDD with AI: Claude Writes Tests First, Then the Implementation

Most teams know TDD works. Few actually practice it. The friction is real: writing a test before the implementation means thinking through the API, edge cases, and module contract before a single line of logic exists. That's cognitively expensive. An AI assistant removes this barrier. Claude Code turns test-first from a discipline exercise into a natural development workflow. Tests become the specification, and the implementation is generated against them. Why TDD Stalls Without AI The classic TDD cycle: Red → Green → Refactor.