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Joey Yakimowich-Payne 770d0fd9cf
 feat(presets): double-move (both sides play 2 half-moves per turn) 
Phase B.2 of the rule-variants epic. Each side plays two consecutive
half-moves before the turn flips; turn order is WW BB WW BB …

Implementation is a two-line `shouldAdvanceTurn` hook on top of the
Phase A.3 `HalfMovesThisTurn` fact — veto the flip while the post-
increment count is < 2, let the engine default flip proceed otherwise.
No engine, schema, or layout modifications.

Check / checkmate composition is free: the self-check filter runs per
half-move (so neither half-move may leave own king exposed), and
`checkGameResult` runs after every applyMove regardless of flip, so
mate on the mover's second half-move lands exactly where it should
without any double-move-specific terminal logic.

Documented composition with `piece-hp` (independent; damage pipeline
doesn't read HalfMovesThisTurn) and `king-heals` (uses onAfterMove,
not onTurnStart — fires on every half-move including vetoed ones;
pinned by the test). Declared `incompatibleWith: ["monster-rules"]`
because both redefine the flip hook in conflicting ways.

Test count: 1461 previous → 1479 total (+18). The double-move.test.ts
file contributes 18 behavioral tests covering preset definition sanity,
WW BB WW counter semantics, onTurnStart cadence, mid-turn check
delivery, Fool's-Mate-style and Scholar's-Mate-style checkmate
detection, composition with piece-hp, composition with king-heals, and
session-snapshot integrity mid-veto. Exceeds the 12-test floor.

- packages/chess/src/presets/double-move.ts (new)
- packages/chess/src/presets/double-move.test.ts (new, 18 tests)
2026-04-21 07:15:59 -06:00
.github/workflows chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00
.sisyphus docs(preset-api): hook ordering + Phase A summary 2026-04-20 20:52:51 -06:00
docs docs(adr): T4 scripted modifiers forward-design 2026-04-19 21:09:52 -06:00
packages feat(presets): double-move (both sides play 2 half-moves per turn) 2026-04-21 07:15:59 -06:00
scripts feat(rete): add replay engine + state-hash determinism verifier (P3.3) 2026-04-16 15:25:13 -06:00
.gitignore chore: ignore .org.chromium.Chromium.* runtime files 2026-04-19 10:20:42 -06:00
eslint.config.js feat(engine): damage-resistance modifier descriptor 2026-04-18 22:22:31 -06:00
lefthook.yml chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00
LICENSE chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00
package.json feat(rete): add replay engine + state-hash determinism verifier (P3.3) 2026-04-16 15:25:13 -06:00
playwright.config.ts fix(rete): inject clock into EventLog; use tsc for DTS; fix cycle.test.ts private access; add Playwright worker limit 2026-04-16 18:25:49 -06:00
README.md chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00
tsconfig.base.json chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00
tsconfig.json chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00
vitest.workspace.ts chore(root): scaffold monorepo — Phase 0 complete 2026-04-16 13:32:21 -06:00

README.md

@paratype

A Doorenbos-style Rete II rules engine for TypeScript games, with an authoritative WebSocket chess demo.

Packages

Docs

Getting Started

bun install && bun run check