implement

Deliver an authorized issue, feature, or bug fix end to end in any repository: refresh the actual base, use a dedicated sibling worktree and branch, implement the smallest complete change, use a brief test plan and lightweight readiness check, then push and open a draft PR. Reuse the same worktree and PR for follow-ups. Use for "implement this", "implement issue", or an explicitly requested implementation task. Never merge, ready a draft, overwrite unrelated work, or substitute a plan for delivery.