Claude Code Skill scope。Personal Skills(~/.claude/commands/*.md)・全project共通使用・Personal preferences(coding style/tone)・gitignore対象・他PC同期: dotfiles管理(GitHub repo $HOME/.dotfiles bash setup)・Project Skills(.claude/commands/*.md・project root)・project local・git commit可能・チーム共有・project specific workflows・両方YAML frontmatter同format・priority: project skill > personal skill同名時・use case: Personal = Daily quick commands/Personal style/Personal API key・Project = Team workflow/Architecture rules/CI integration・例: Personal /loop /todo /note・Project /deploy /test-suite /code-review・2026年 双方使い分け確立。