assistant

Use when creating, changing, testing, or reviewing Ruby service objects, especially Assistant::Service subclasses, service inputs, validation, execution, logs, or Minitest coverage.

Use when opening a GitHub pull request for the assistant gem (e.g. `gh pr create`, "open a PR", "ship this branch"). Ensures local checks pass, only intended files are committed, commit/PR follow the M<num> convention, and the PR is assigned to the GitHub user before returning the URL.