Agent Skills: skill-management

IMPORTANT: Activate this skill BEFORE modifying any skill in ~/.claude/skills/. Guide for creating, updating, and maintaining Claude Code skills following best practices. Use proactively when: (1) creating a new skill, (2) modifying an existing skill in ~/.claude/skills/, (3) user requests to create, improve, update, review, or refactor a skill, (4) discussing skill quality or effectiveness. Always commit skill changes to the skills git repository after making modifications.