- hand-derived vectors from the plan's <polyline_vectors> block - external live-OSRM demo geometry (RESEARCH Finding 1) as ground truth - P7 pins the truncated-varint refusal law (T-05-02)
- types.ts: the D-01 backend-ladder seam (fixture -> wasm-router -> valhalla), D-03 null contract documented on the interface, D-07 day-one fields (RouteStep typed + RouteGeometry.cumulativeDistanceM, GUID-05/06 obligation) - route-fixtures.json: committed EMPTY seed with the ODbL header (license/attribution/notice, T-05-06) — plan 05-02 populates it
- fifth npm workspace @araharah/routing (buildless TS, search/ precedent) - root delegates routing:test / routing:typecheck / routing:corpus - C1-C6 RED: contract gates fail while src/types.ts + seed are absent