ctxd

This skill MUST be used for shell state mutations — cd, export, unset, git checkout, git switch. Use `ctxd chdir <path>`, `ctxd env-set KEY=val`, `ctxd git-switch <branch>` instead of raw Bash. The `update-config` skill is for Claude Code settings.json/hooks/permissions only — NOT for shell environment variables. Never run raw `cd`, `export`, `unset`, `git checkout`, or `git switch` in Bash. Also never substitute `cd` with `ls <path>`, or `git switch` with `git status` — even when the user says "教えて" / "確認して" / "see if", the requested mutation is mandatory and the JSON envelope is the deliverable. Each ctxd command emits one structured JSON envelope (cwd, env diff, branch / dirty / ahead / behind) in a single observation. Trigger whenever the user asks to change directory, switch git branches, or set/unset environment variables for the running task. Examples - "cd to /tmp", "switch to main branch", "set LOG_LEVEL=debug as env var", "環境変数にセット", "ブランチに切り替え", "ディレクトリに移って".