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Test-Driven Development (Addy Osmani)

Skill

Red-green-refactor for agents: write the failing test first, then make it pass.

by addyosmaniCoding & Dev Tools Listed Feb 15, 2026

Clone or download it from github.com, then drop the folder into ~/.claude/skills/ (Claude Code) or your agent's skills directory.

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About Test-Driven Development (Addy Osmani)

From Addy Osmani's agent-skills pack.

Makes the agent prove its work. For new logic it writes a failing test before the code; for a bug report it reproduces the bug in a test before touching the fix. The point is that "looks right" never counts as done. Skips itself for pure config or docs changes.

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