Agent Skills: skill-creator

Build, review, and improve agent skills. Validates against the agentskills.io spec, evaluates quality via a dimensional rubric, detects description drift, produces numbered improvements, and applies them with approval. Use when: creating a new skill, reviewing/auditing/judging a skill or prompt, updating/fixing a skill, evaluating prompt quality, 'skillify this', 'make this proper', 'audit all skills', 'grade report'. Triggers: skill, SKILL.md, prompt quality, knowledge delta, skill review, skill audit, judge prompt, skill creation.