Check implementation against spec Use this skill only when exists during PR review. Goal Determine whether the implementation in the checked-out PR materially matches the approved spec context. This is a supplement to the normal code review, not a separate output. Inputs - contains the spec context to compare against. It may include both product spec content (intended behavior, acceptance criteria) and tech spec content (implementation details, file changes). - contains the annotated diff for the PR. - may contain additional scope or rationale. - The working tree contains the PR branch conten…