specrail-check-impl-against-speclisted

# SpecRail Check Implementation Against Spec Use this skill when the question is whether implementation matches the spec. ## Steps 1. Read the linked issue, `product.md`, `tech.md`, `tasks.md`, and the diff or PR under review. 2. Map every acceptance criterion and task ID to implementation evidence, verification evidence, or a missing item. 3. Identify extra behavior not requested by the spec. 4. Check that stable IDs, paths, JSON keys, states, and commands remain in English. 5. Report results as: - covered - missing - mismatched - extra scope - needs human decision 6. Recommend the smallest corrective action for each gap. ## Boundaries - Do not treat partial coverage as approval. - Do not rewrite the spec to match an implementation unless the user asks for a spec revision. - Do not merge or provide final approval.