What problem does it solve? It provides an explicit, isolated way to verify that the Task Implementer skill works correctly, running deterministic contract checks and optionally exercising a real disposable frontend/API/PostgreSQL fixture without touching user projects. ## Core Features & Use Cases - Deterministic Verification: Run the no-flag suite to validate Task Implementer metadata, public interface parity, workspace, scheduler, and Git wave contracts without Docker or real projects. - Disposable Live Lifecycle: Use --create to seed a local-only brownfield fixture, drive the real Task Implementer workflow, launch a labeled Docker Compose stack, and validate application and database semantics. - Owned Cleanup and Retention: Use --create --keep to retain one generation for inspection and --destroy to remove exactly that owned generation, with generation-fenced state and sanitized stage-matrix reports. - Use Case: After modifying Task Implementer, run the verifier to confirm worker isolation, digest-bound handoffs, fast-forward promotion, and an unchanged-prompt ALREADY_COMPLETE rerun before releasing. ## Quick Start Ask the agent to run $task-implementer-test to execute the deterministic verification suite and produce a sanitized report.