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537a2654093a0f9a59acd66f72ad9c575ec5a771
scrabble-game/ui/src/lib/robot/testdata/strategy.json
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Ilia Denisov 8c5995c076
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feat(offline): port robot move-choice strategy to TS (parity-pinned) 
Phase A (2/2) of PWA offline mode: the offline robot picks its move exactly as the
server does, so a local vs_ai game plays the same. Builds on the move generator
from #188; not wired into a game loop yet (Phase B).

- ui/src/lib/robot/strategy.ts: port of backend/internal/robot/strategy.go's
  move-choice slice — mix (FNV-1a, via BigInt for bit-exact uint64), playToWin
  (~40% play-to-win), deviates (the fading off-strategy wobble) and selectMove
  (pick the candidate whose resulting margin lands closest to the +/-[1,30] band,
  conservative tie-break), composed by decide(). The generator's ranked moves feed
  straight in. Think-time/sleep/nudge scheduling is server-only and not ported.
- backend/internal/robot/strategyfixture_test.go: an in-package, env-gated emitter
  (EMIT_STRATEGY_FIXTURES=1) writing golden fixtures from the real Go strategy — it
  reaches the unexported mix/playToWin/deviates/selectMove.
- strategy.parity.test.ts: 21 mix + 56 decision cases match Go exactly (play/
  exchange/pass, the deviate flip, tie-break, band overshoot).

Pure additive library code; no runtime behavior change (unused at runtime, so the
bundle is unchanged).
2026-07-06 01:54:20 +02:00

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