limu: Faster Immutable State Management with Immer‑compatible API
From the repo · “High performance immutable lib alternative to immer with the same api, based on shallow copy on read and mark modified on write mechanism.”
Create high-performance immutable data structures in JavaScript using Limu.
"A founder building a live leaderboard for a sports game app needs to update scores in real-time, so they use Limu to create a fast and immutable data structure for the scores, then deploy it to their production environment."
- •When you need efficient data management in your JavaScript application
- •When you're looking for a lightweight alternative to immer for state management
- •When performance is critical and you want to avoid unnecessary data copying
produce({ a: { b: [1, 2, 3] } }, draft => { draft.a.b.push(4); }); // creates a new state with an updated array without mutating the original stateSkip the builder — one click puts this in Claude, Cursor, Antigravity and more.
Installs with a command or two; your AI agent can do it for you.
mkdir -p ~/.claude/skills/limu && curl -fsSL https://workflowstacks.com/api/skills/limu/claude-skill -o ~/.claude/skills/limu/SKILL.mdOpens the app with this repo with the prompt ready to go — no copy-paste needed.
Limu: Faster Immutable State Management with Immer‑compatible API is a medium JavaScript project (~5.7k lines across 59 code files, plus 98 test files). Setup is light: installs like a normal app. Reading the code is optional. Last commit 7 months ago, MIT license, has a test suite.
- 1README.mdStart here — what it does and how to install it
- 2src/index.tsWhere the program starts running
- 3package.jsonDependencies and the commands it exposes
Skip the builder — one click puts this in Claude, Cursor, Antigravity and more.
Installs with a command or two; your AI agent can do it for you.
mkdir -p ~/.claude/skills/limu && curl -fsSL https://workflowstacks.com/api/skills/limu/claude-skill -o ~/.claude/skills/limu/SKILL.mdOpens the app with this repo with the prompt ready to go — no copy-paste needed.
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Pages we wrote and tested that put a skill like this to work — importable n8n templates, outcome guides and Claude Desktop configs.
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