Claude Code Skills·Claude Skills·The open SKILL.md registry for Claude
ClaudSkillsSkill of the Day › 2026-06-25

Thursday, 25 June 2026

mutate

Run mutation testing to verify test effectiveness by analyzing killed, survived, and uncovered mutants.

Install with one command:

/add-skill mutate
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How the daily pick works

Each UTC day, ClaudSkills picks one skill from the top-quality bucket of the catalog via a deterministic date-hash. Install ClaudSkills to your home screen (see the install guide) and opt in below to get a daily push notification with the new pick.

Pool source for this date: daily_eligible. Catalog count at render time: see /stats/.

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