Use when creating new skills, editing existing skills, or verifying skills work before deployment
Writing skills IS Test-Driven Development applied to process documentation.
Write test cases (pressure scenarios with subagents), watch them fail (baseline behavior), write the skill, watch tests pass (agents comply), refactor (close loopholes).
Core principle: If you didn't watch an agent fail without the skill, you don't know if the skill teaches the right thing.
A skill is a reference guide for proven techniques, patterns, or tools.
Skills are: Reusable techniques, patterns, tools, reference guides. Skills are NOT: Narratives about how you solved a problem once.
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