Review a branch or PR you didn't write¶

The reviewer subagents don't care who wrote the diff. The work loop points them at your own working tree, but you can point them at anyone's.

Prompt your agent:

Use the work-loop to review branch <their-branch>.

Name whatever your agent can reach. A local branch always works; if the agent has the tooling (gh, glab, an MCP server), point it straight at a hosted change instead — "review GitHub PR #123", "review this GitLab MR".

It resolves the diff and runs adversarial-reviewer (plus security-reviewer / quality-engineer if the diff warrants) — the same REVIEW step described in Plan and execute non-trivial work.

Two things worth saying out loud:

• No spec? Say so. An in-flight branch usually has no spec, so the reviewer falls back to the spec-less self-review lens. If the branch does carry a docs/specs/<feature>/spec.md, name it — the reviewer then checks the diff against the spec instead.
• It's a throwaway review. You want the findings, not a loop run. Don't expect state.json or stasis detection; read the severity-tagged output and hand it to the author.

See also¶

• The core pack — why the reviewers read the diff cold, and what each lens covers.