utils/ts_core/package.json
Krzysztof kuhy Rudnicki 41f014e7a7
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ts_core: a framework-free TypeScript utility package
`Clock` and a seeded mulberry32 RNG had each been reimplemented across the
game and web repos -- Clock twice (konbini-67, iron-and-anvil, doc comments
near-verbatim), the RNG four times. None of it is UI, so no existing shared
package owned it: `web_ui` ships `tokens.css` and React components, and a
game importing a UI package to get a seeded RNG is exactly the coupling
that makes people vendor their own copy instead.

The RNG deliberately exports **two** interfaces rather than reconciling
them into one. konbini-67 threaded mutable state through free functions;
sims3-clone and europe-county-map returned an object of closures. The
sequence is the contract here -- these repos have seeded tests and "same
seed -> identical world" guarantees, so changing how many times a helper
advances the generator silently re-rolls every saved world. A shared
package that did that would be worse than the duplication it replaces. The
core is shared, so both interfaces yield the same float sequence; that is
asserted, not assumed.

`rng.test.ts` pins the first five floats for seed 12345, captured from the
pre-extraction konbini-67 implementation rather than from this one -- a
golden test generated from the code under test only asserts that the code
matches itself. It earned its place immediately: the first constants I
wrote came from a truncated `toFixed(9)` probe and the test failed, which
is precisely the class of silent precision drift it exists to catch.

`hotline3d` is not a consumer and should not become one. Its generator uses
`%` and `Math.trunc` where mulberry32 uses `>>>`/`>>`; measured, it emits a
different sequence, so adopting this package would change its output.

29 tests, 100% branch/function/line/statement coverage, type-aware eslint,
and a committed dist/ with a CI freshness check -- the same bar web_ui
holds.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01U4Rj3s7K2qzrLNgJqqPhno
2026-08-15 15:42:41 +02:00

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{
"name": "@kuhyx/ts-core",
"version": "0.1.0",
"private": false,
"type": "module",
"description": "Framework-free TypeScript utilities shared across kuhy's games and web apps: an injectable Clock and a seeded mulberry32 RNG. Deliberately no React and no CSS -- see @kuhyx/web-ui for the UI layer.",
"license": "MIT",
"engines": {
"node": ">=24",
"pnpm": ">=10"
},
"packageManager": "pnpm@10.13.1",
"files": [
"dist"
],
"main": "./dist/index.js",
"types": "./dist/index.d.ts",
"exports": {
".": {
"types": "./dist/index.d.ts",
"default": "./dist/index.js"
}
},
"scripts": {
"build": "tsc -b",
"lint": "tsc --noEmit -p tsconfig.lint.json && eslint .",
"test": "vitest run",
"coverage": "vitest run --coverage"
},
"devDependencies": {
"@eslint/js": "^10.0.1",
"@types/node": "^26.1.1",
"@vitest/coverage-v8": "^4.1.10",
"eslint": "^10.7.0",
"typescript": "^6.0.3",
"typescript-eslint": "^8.64.0",
"vitest": "^4.1.10"
}
}