add-contributor

# Add a contributor Approve the requested GitHub account for PRs in `get-bb/bb`. The default workflow includes committing, opening a PR, and closing it out with SlopCop review and CI skipped. Honor narrower user instructions, such as opening a PR for review only. Loading this skill without a request to approve someone does not authorize changes. ## Resolve the account Accept a GitHub login, `@login`, or GitHub profile URL. If the request contains only a display name or an unfilled placeholder such as `{}`, ask for the GitHub login. Verify the account with `gh api users/<login> --jq .login` and use the returned canonical login. Treat the login as data and quote shell arguments. If the lookup fails, resolve the error before changing approval; do not guess a different account. ## Edit the allowlist Paths below are relative to the repository root: - Edit `.github/APPROVED_CONTRIBUTORS`: one GitHub login per line, without `@`. Match existing entries case-insensitively after removing whitespace, as the gate does. Append a missing login, preserving existing entries and a final newline. - Read `.github/workflows/pr-gate.yml` to confirm the current enforcement behavior. It reads the allowlist from the PR's base branch, so approval takes effect only after the allowlist change lands there. - `.github/workflows/approve-contributor.yml` implements the separate `/approve` comment path. `CONTRIBUTING.md` describes the approval policy. Neither needs an edit for a routine co...