Review the quality of an agent skill beyond specification conformance — whether its instructions are grounded in real expertise, calibrated between prescriptive and open, economical with context, and structured for progressive disclosure. Use when the user asks to review, critique, improve, or audit a skill; asks why a skill produces poor or inconsistent results; wants feedback on a SKILL.md they wrote; or asks whether a skill is worth keeping. Complements spec validation, which catches format errors but says nothing about whether the instructions are any good.
