Start ecosystem registry service

README.md

@@ -49,3 +49,13 @@ See `docs/adoption-guide.md` for the declaration workflow and
 See `docs/ecosystem-registry-service.md` for the standards comparison and
 service direction for registering repos and interacting with the combined
 ecosystem model.
+
+Start the first registry service slice with:
+
+```bash
+railiance-fabric-registry --db .railiance-fabric/registry.sqlite3 --port 8765
+```
+
+The initial service exposes repository registration, graph snapshot ingestion,
+graph query endpoints, and a State Hub export endpoint. It stores snapshots in
+SQLite and reuses the Fabric graph export shape.