Test-driven development. Use when the user wants to build features or fix bugs test-first, mentions "red-green-refactor", or wants integration tests.
Install
npx skills add mattpocock/skills --skill tddnpx skills add mattpocock/skills --skill tdd -a claude-code -gnpx skills add mattpocock/skills --skill tdd -a codex -ggemini skills install https://github.com/mattpocock/skills.git --path skills/engineering/tddgh skill install mattpocock/skills tddgit clone --depth 1 https://github.com/mattpocock/skills /tmp/mattpocock__skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/mattpocock__skills/skills/engineering/tdd ~/.claude/skills/tdd # Claude Code
cp -R /tmp/mattpocock__skills/skills/engineering/tdd ~/.agents/skills/tdd # Codex, Cursor, Gemini CLI, Copilot, OpenCode