What problem does it solve? Design documentation drifts out of sync with the actual codebase as repositories evolve, leaving agents and engineers with contradictory or outdated engineering context. This Skill reconciles MINE-managed design with repository reality using a code-first authority model. ## Core Features & Use Cases - Code-first synchronization: Rewrites docs/design/ to match observable code, schemas, and configuration, with code winning by default unless the user explicitly protects a design decision. - Mandatory verified backup: Creates a verified local backup of the design tree before any mutation, blocking synchronization if backup verification fails. - Discrepancy classification and reporting: Classifies drift (missing design, removed behavior, protected decisions, suspicious code) and writes a sync report under .mine/runtime/sync/ with a final status of SYNCHRONIZED, SYNCHRONIZED_WITH_WARNINGS, or BLOCKED. - Use Case: After onboarding an existing repository or making substantial out-of-band changes, run a sync to audit the codebase, update the design tree, and receive a report of unresolved risks before a stable release. ## Quick Start Ask the agent to run mine-sync to audit this repository and update the design documents to match the current code.