Review other people's (or other agents') changes with rigor and proportion. Auto-load when asked to "review this PR / diff / change / patch", when acting as a reviewer on someone else's work, when reviewing AI-generated code, or when writing/receiving review comments. Covers intent-before-diff reading, review order (tests → contracts → logic → style), severity taxonomy (blocking/important/nit), per-change-type checks, actionable comment craft, and the silence rule (no genuine issues → approve, never invent nits). NOT for making the change yourself (change-control) and NOT for security-focused audits (security-review-playbook).
