Implement only the approved slice with minimal, explicit, review-friendly changes, then persist execution evidence in slice notes and TASK_STATE.md. The single official execution path of the workflow. Supports an opt-in test-first mode, per slice or via --tdd, that writes the failing test before the code. Use when the plan is valid, the current slice is defined and approved, correctness-critical ambiguity is resolved, and the files in scope are known well enough to edit safely. Do not use during discovery, contract refinement or planning, when unresolved ambiguity affects correctness, when the next step is only to sync memory or close the slice (use sync-task-state or sli…
