from dotfiles33
Guides an agent through a strict red–green–refactor TDD cycle: write a failing test, implement the minimal change, and refactor with verification.
This skill embeds a disciplined Test-Driven Development workflow into agent work: identify the smallest observable behavior change, write a failing test, make the minimal production change to pass, then refactor while keeping tests green. It forces incremental, verifiable progress so agents avoid speculative or broad changes without test coverage.
Use this skill when implementing new features, fixing reproducible bugs, adding regression coverage, or changing public business logic where tests can verify behavior. Do NOT use for documentation-only edits, purely mechanical renames, or when no test harness exists.
Best suited to coding-capable agents that can run project tests and edit code (Copilot-style agents, Codex, GitHub Copilot Chat, or similar). The skill assumes access to the repository's test tooling and the ability to run test commands and edit files.
This skill has not been reviewed by our automated audit pipeline yet.
