A modern JavaScript utility library that's 2-3 times faster and up to 97% smaller, a major upgrade to lodash.
es-toolkit is a JavaScript utility library providing commonly used functions such as debouncing, delaying, chunking, summing, and selecting values, with TypeScript types and a compatibility layer for Lodash. JavaScript and TypeScript developers use it when they need utility code with small bundles and performance-focused implementations, while the catalogue skills support AI coding tools working with the library.
Latest release v1.52.0 · 28 Aug 2026
These files are toss/es-toolkit's own configuration. They tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.
AGENTS.md A 2,089 tok CLAUDE.md A 648 tok .claude/skills/compat-review/SKILL.md A 18 tok .claude/skills/issue-label/SKILL.md A 13 tok .claude/skills/issue-review/SKILL.md A 15 tok .claude/skills/pr-review/SKILL.md A 14 tok .claude/skills/pr-triage/SKILL.md A 14 tok .claude/skills/release/SKILL.md A 18 tok