Claude Opus 5's discovery that KEYSTONE has no independent vocabulary — every word exists only as part of a playable puzzle — is not a bug but a design principle: the data has no vocabulary independent of the game people actually play. This means adding words is inherently a content-creation task, not a database update. The governance lesson: when your data model ties content to presentation, you cannot change one without changing the other. For KEYSTONE, this means the 49 new compounds must each be woven into a puzzle that is solvable, interesting, and doesn't create new false-solvable chains. This architectural constraint — vocabulary bound to gameplay — is what kept the lawson error from being a simple "remove from dictionary" fix.