# treebox doctor --repo __ROOT__/repo --isolation docker
# exit: 0
# --- stdout ---

  ● doctor   isolation: docker

    ✓ git                 __GITVER__
    ✓ repo                __ROOT__/repo
    ✓ uid/gid             __UID__:__GID__
    ✓ login: claude       __ROOT__/home/.claude
    ✓ login: codex        __ROOT__/home/.codex
    ✓ .env                __ROOT__/repo/.env
    ✓ git auth            authenticated · fresh fetch will succeed
    ✓ isolation: docker   docker daemon ok

  ✓ everything looks good

# --- stderr ---
  runner: docker (daemon reachable)
