es-toolkit

name	es-toolkit
description	Utility function conventions in the AMC web repo — es-toolkit for lodash-like helpers (lodash-es was removed), but check src/lib/utils first. Read before adding utility helpers.

es-toolkit

• Import named exports directly from the package root: import { debounce, isEqual } from 'es-toolkit'; — it's already tree-shakeable, no per-function import paths needed (unlike lodash-es, which this repo no longer uses).
• Check src/lib/utils/ first — many domain helpers already exist with tests (formatTime, filterSubsets, colorContrast, parsePlayerRole, delivery, math/, media.svelte.ts, …). Add new reusable helpers there with a colocated .test.ts.
• Don't reimplement what es-toolkit already provides, and don't use it for things modern JS does natively (e.g. Array.prototype.at, spread, Object.entries).

Related: [[codebase-patterns]], [[testing]]