Phase A (A4): prove the ported move generator (#188) against the FULL shipped
dictionaries, not just the tiny samples — the deep graphs and complete 26/33-letter
alphabets the samples cannot reach.
- backend/cmd/movegen: add a -dawg-dir mode that emits per-variant golden move-gen
vectors from the real dawgs (a bounded first-move + a blank case + a deep 7-tile
mid-game position). Regenerated in CI to /tmp, never committed (like the
dictgen/validategen vectors), so no dictionary version is pinned into the repo.
- ui/src/lib/dict/generate.realparity.test.ts: env-gated (DICT_DAWG_DIR +
DICT_MOVEGEN_DIR) parity against that golden — 9 positions across scrabble_en /
scrabble_ru / erudit_ru match the Go solver exactly. Skips cleanly when unset.
- .gitea/workflows/ci.yaml: the conformance job now generates the movegen golden
and points the gated vitest at it (DICT_MOVEGEN_DIR).
First engine-first step of PWA offline mode (Phase A): the client-side move
generator — the "robot brain" a local vs_ai game will run on-device — with no
runtime wiring yet (Phase B).
- dawg.ts: add the step-by-step cursor (root/final/next/arcs), a faithful port
of dafsa traverse.go over the reader's existing bitstream.
- generate.ts: the Appel-Jacobson generator (leftPart/extendRight + cross-sets +
counts-rack + board transpose + moveKey ranking), reusing the cursor and
validate.ts evaluate/connected. A cross-set LetterSet is a Uint8Array, so the
33-letter Russian alphabet (index 32) is exact under JS bit ops.
- validate.ts: export connected for the generator's connectivity filter.
- backend/cmd/movegen: dev tool building small sample dictionaries and emitting
golden move-generation fixtures from the real Go solver (EN + RU).
- tests: dawg.cursor.test.ts (enumeration bijection vs indexOf) and
generate.parity.test.ts (7/7 vs the Go solver: empty board, mid-game, blank,
single-word rule, Russian index-32 cross-set). The committed EN sample also
unblocks the existing skipped dawg.parity.test.ts once wired with DICT_* in CI.
Pure additive library code; no runtime behavior change.
Ilia Denisov