Execute Phase

Step executor for units. The unit doc (created by unit-lane) owns Tasks P1…Pn, Evidence rows, and a Progress log — these replace PLAN.md, TASKS.md, progress.md, and ACCEPTANCE.md. Each step runs as an atomic gate/commit.

Argument resolution (first match):

• <NN-slug> P<k> — exactly the step named by the triage order (P1, P2, …)
• <NN-slug> (no step) — all remaining steps, one commit each
• P<k> alone — the step by position in the current unit (last-known NN-slug)

Never infer a step ID absent from the triage block in the unit doc.

Turn contract

Tick every box before ending the turn; an unchecked box means the turn is not done: