Build new Claude skills from scratch or supercharge existing ones through rigorous evaluation and iterative improvement. Use when the user wants to create, build, improve, evaluate, audit, enhance, benchmark, test, or package a skill. Also trigger for "turn this into a skill", "make this reusable", "I keep repeating this workflow", or references to SKILL.md, skill frontmatter, description optimization, or skill packaging. Do NOT use for general coding tasks, document creation, or other non-skill workflows. Even if the user just says "skill" in the context of Claude capabilities, this is likely the right skill to load.