The field was declared on the request type, commented on it, and applied by the
update handler — and the create handler never read it. Creating a project into a
group answered 201 and put it nowhere. A field that is accepted and discarded is
worse than one that is refused: nothing reports it.
Found by looking at a screenshot. Both groups stood empty while the projects sat
loose above them.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>