Every address lookup is really a point-in-polygon query against district shapes. You can't ship that endpoint without these — and serving GeoJSON directly is a standalone product for Mapbox / Felt / ArcGIS users.
Precincts, council wards, school zones, water districts — all keyed on the same OCD-IDs as every other PoliAPI object.
GET /v1/districts/{ocd_id}.geojson