Steer generation rules toward direction pools and readable fills.

Direction-first pools, recipes, and grade manifestation replace enum-tag stuffing; spawned products can be deleted and in-flight runs aborted.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/runtime/phase-machine.ts

@@ -421,7 +421,8 @@ export function canApplyEvent(
         reason?.kind === "approve_step" ||
         reason?.kind === "worker_questions" ||
         reason?.kind === "input" ||
-        reason?.kind === "revision"
+        reason?.kind === "revision" ||
+        reason?.kind === "review_artifact"
       );
     case "creation_step_pick_awaited":
       return session.phase === "running";