Check implementation against spec

Use this skill only when spec_context.md 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

• spec_context.md 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).
• pr_diff.txt contains the annotated diff for the PR.
• pr_description.md may contain additional scope or rationale.
• The working tree contains the PR branch contents.

Process