The edge caddy @gateway matcher was missing /dict/*, so the client's dictionary
fetch fell to the static landing catch-all: it received a non-dawg blob (200 OK),
which the reader parsed into a bogus finder that reports every word missing — a
valid first move showed as illegal with no network fallback. Add /dict/* to the
gateway route.
Hardening + the cross-test that would have caught it:
- reader: reject a blob whose 32-bit size header != its byte length, so a
non-dawg page or a truncated download now throws and the loader falls back to
the network preview instead of silently validating against garbage.
- eval.parity: an adapter conformance suite that drives evaluateLocal through the
real letter-space path (the server alphabet table, a letter board and letter
placements) against the engine — the algorithm-level validate.parity did not
exercise the adapter. validategen now emits the alphabet table for it.
- a CI deploy probe asserts {edge}/dict reaches the gateway (401), not the landing.
- the DebugPanel reports the feature flag, the bad-connection breaker and the
cached dictionaries with their sizes; its reset also clears the dict cache.
Score and validate a tentative move on-device instead of a per-arrangement
network round trip. The dawg reader and the validate/score/direction slice of the
scrabble-solver engine are ported to TypeScript (ui/src/lib/dict), pinned
byte-for-byte to the Go engine by a new `conformance` CI job. The server stays
authoritative — submit_play re-validates — so the local result is an advisory
accelerator only; any cache miss, storage eviction or a bad-connection breaker
falls back to the network evaluate.
- backend: Registry.DictBytes + an authed GET /api/v1/user/dict/{variant}/{version}
(immutable) streaming the pinned per-game dawg.
- gateway: a session-gated /dict edge route proxying it; fetchDict on the transport.
- client: an IndexedDB blob cache (best-effort, storage.persist()) + a loader
(memory -> IndexedDB -> network, session-scoped bad-connection breaker) + a lobby
prefetch (your-turn first); an adapter over the existing premiums/alphabet; a
DictWarmup overlay while a cold dictionary loads (120ms flash-guard, 5s cap ->
network); a ?nolocal flag; the DebugPanel reset also clears the dict cache.
- parity: generators backend/cmd/{dictgen,validategen} + gated Vitest suites, run
in CI against the release dictionaries.
- docs: ARCHITECTURE §5, TESTING, UI_DESIGN, FUNCTIONAL (+ru).
Ilia Denisov