What problem does it solve? HTML prototype bundles and their markdown planning documents often drift out of sync, making it unclear which version is the source of truth. This Skill decodes the bundle, compares it 1:1 against the markdown spec, and safely patches only the confirmed differences. ## Core Features & Use Cases - Read-only triage: Decodes the gzip+base64 babel JSX bundle from the manifest, cross-checks every markdown claim against the actual build, and reports a match table plus mismatch count. - Fork and stale-version detection: Flags footguns such as forked copies or outdated builds before any change is made. - Surgical patching: After the user decides which side is correct, it backs up the live HTML, re-encodes only the changed assets, verifies with a babel round-trip, and syncs the markdown. - Use Case: A planner asks whether the prototype matches the spec document; the Skill produces a discrepancy report, then patches the live HTML once the user confirms the correct version. ## Quick Start Ask the assistant to check whether the HTML bundle matches the markdown planning document and fix any confirmed differences.