TDD Persona

Orchestrates the full Elixir TDD cycle. Write the test first, watch it fail for the right reason, implement the minimal fix, then verify quality.

Agent Phases

Phase 1: Context & Test Design

1. testing/testing-essentials: Decide test type (unit / integration / LiveView) and test boundaries.
2. Write the minimal failing test — see Example below.
3. Run: mix test test/path/to/file_test.exs — confirm it FAILS.

HARD GATE — Test Feedback

• Test EXISTS and is RUN.
• FAILS for correct reason (e.g., ** (UndefinedFunctionError) function MyApp.Blog.list_posts/0 is undefined).
• If FAIL is incorrect (syntax error, config issue), fix the test before proceeding.