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systemic-game-design-course/naive-engine/ts/README.md
T
Lucas WintherandClaude Opus 5.5 ffa99785c3 feat: module 0 rewrite trap
Naive engine in Rust and TypeScript (immediate damage, inline triggers,
recursive Deathrattles, cards defined in the engine) with
test_00_naive_runs and the expected-fail test_00_real_rules_whirlwind_order,
plus the Module 0 lesson.

Co-Authored-By: Claude Opus 5.5 <[email protected]>
2026-10-29 00:07:14 +01:00

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# Naive engine: TypeScript
The throwaway engine for [Module 0, The Rewrite Trap](../../course/00-rewrite-trap/lesson.md). It is written the obvious way on purpose: minions are shared object references, damage applies at once, triggers fire inline, and a Deathrattle runs the instant a minion's Health reaches 0. Cards are defined inside the engine (`makeMinion` and `cast` in `src/engine.ts`).
Run the tests from this directory:
```
npm install
npx vitest run
```
You should see two passing tests:
- `test_00_naive_runs` passes normally.
- `test_00_real_rules_whirlwind_order` is expected to fail. It states the real game's event order, which this engine cannot produce, so it is marked `test.fails`. To see the order the engine actually produces, change `test.fails(` to `test(` and run the tests again.
`npm run typecheck` runs the TypeScript compiler.
Do not use this package in Module 1. Your real engine starts from `workspace-template/ts/`.