Use for ordinary authorised change — the default lane once the decisor has ruled out a question and not selected the chain. Keeps one feature document per feature in 02-DOCS holding intent, scope, checklist, evidence and next step, checks tasks off only against observed proof, and branches when the work writes code. NOT the ten-phase chain (that is `sdd`), NOT the classification itself (that is the decisor in `suggest`), NOT a request for information, which writes nothing.
