Review someone else's GitHub PR - checkout locally, deep read-only review, output copyable findings. Never posts, approves, or merges. Invoke when Josh says things like 'review this PR', 'can you look at Dave's PR', 'take a look at #12', 'review PR 340 for me', 'what do you think of this pull request', 'look over their changes', or drops a PR link and asks for a look. Disambiguation with pr-feedback: authorship decides. A PR authored by someone else belongs here. A PR Josh authored that has review comments to act on belongs to pr-feedback - cues for that are 'our PR', 'my PR', 'feedback we got', 'address the review', 'reviewer said'. When the phrasing is ambiguous ('look at PR 12'), check the PR author with gh before choosing. Takes a PR ref plus an optional note; with no ref, resolves the PR from the conversation or the current branch.