evaluate-skill

Use when you want to behaviorally evaluate a Claude Code skill — measure whether it auto-activates on the prompts it should and stays quiet on near-misses (trigger recall and specificity), whether its output actually satisfies its own discipline (correct-usage), and whether it beats the no-skill baseline (with/without) — producing a scorecard with confidence intervals. Triggers on "evaluate this skill", "test my skill", "does my skill fire", "measure or benchmark skill performance", "is my description triggering", "build an eval for this skill", or running "/evaluate-skill". Claude Code only — it spawns many headless claude -p runs, so it is cost-gated; show the plan first. Not for a one-off manual spot-check, for judging a skill's design qualitatively (that is a fresh-eyes panel, not a behavioral eval), or for listing which skills are installed (that is toolkit-awareness).