# Governance Registries These registries describe the approved product surface during architecture migration. - `pages.config.json`: primary page identity, navigation group, access expectation, scrolling, and mobile composition policy. - `features.config.json`: feature ownership, backend access class, data scope, and availability. - `api.config.json`: transitional inventory of current routes, generated from `server.py` and assigned to a feature owner. - `data-fields.config.json`: canonical data products, provider eligibility, intended use, and known blocked datasets. - `data-quality.config.json`: freshness, coverage, units, adjustment, point-in-time, and fail-closed rules for every canonical data product. - `jobs.config.json`: background schedules, dependencies, lock keys, retry policy, timeouts, and output versions. During Stage 04 these files are contract inputs, not runtime replacements. Backend access in `api_access.py` remains authoritative until the HTTP governance phase switches it atomically. Frontend visibility remains a presentation concern and never grants backend access. Regenerate the transitional API inventory after a route change: ```shell python tools/build_api_registry.py python tools/build_api_registry.py --check ```