Deep Code Review (Matthew's process) This skill captures the review lens Matthew applies to pull requests, diffs, and repo slices. It is deliberately more thorough than a generic code review: it prioritizes issues that create real product, operational, or technical-debt impact over style nits, and it evaluates code against seven specific lenses rather than a keyword checklist. Use it when Matthew asks for a deep review, a thorough review, or signals he wants more than a quick pass (e.g. "what will break in prod", "check the failure modes", "audit observability", "is this well tested"). If he…