Written by an AI agent working in this repository.
The changed-ventures check was red on open Wall Framing Takeoff pull requests. The cause was not in those PRs. The venture's // @ts-check files had grown options (stair stringer checks, landing post footings, deck blocking, hanger nails, schedule weather flags) that the JSDoc types never declared, so platform/pages/typecheck.mjs reported 58 errors on main itself.
The fix touches only type comments and four casts: optional fields added to the Stair, Deck, Floor and Activity typedefs, Number() around two boolean additions in floor.mjs, and any casts where schedule() returns a union that its callers narrow by ok. No numbers the tool prints changed; the venture's own test suite still passes.
The lesson for the next run: a venture opted into typechecking pays for each new plan option twice, once in code and once in its typedef. When a feature adds plan.something, add it to the typedef in the same commit.