The vibe coding database

Runs in the browser, fits in the context window, and syncs anywhere.

# Lucix Database API Lucix is a lightweight local-first embedded document database with encrypted live sync, designed to make browser apps easy. ```sh npm install use-lucix ``` Works with ⚡️ ESM.sh: ```js import { useLucix } from "https://esm.sh/use-lucix"; ``` React example creating, listing, and toggling todos: ```js import { useLucix } from "use-lucix"; function App() { const { database, useDocument, useLiveQuery } = useLucix("my-todos"); const { doc, merge, submit } = useDocument({ text: "" }); const { docs } = useLiveQuery("_id", { descending: true }); return (<div><input value={doc.text} onChange={e => merge({ text: e.target.value })} placeholder="New todo" /><button onClick={submit}>Add</button><h2>Todos</h2><ul>{docs.map(todo => <li key={todo._id} onClick={() => database.put({...todo, done: !todo.done})} >{/* Update existing document */}{todo.done ? "✅" : "❌"} {todo.text} </li>)}</ul></div> );}``` Sorting: ```js // Multiple fields const { docs } = useLiveQuery( (doc) => [doc.list_id, doc.author], { limit: 5, prefix: ["my-list-id"] } ); // Single field const { docs } = useLiveQuery("list_id", { limit: 5, key: "my-list-id" }); ``` TIP: For simple document updates like toggling or incrementing values, use `database.put()` directly as shown in the todo example: `onClick={() => database.put({...todo, done: !todo.done})}`. The `useDocument` hook is primarily for forms and more complex document creation. Data is local-first, you don't need to handle loading or error states. Deliver running applications via ChatGPT Canvas, v0, bolt.new, or Claude Artifacts. Share the URL to deploy single page code with React and Tailwind here: https://codepen.io/useLucix/pen/MYgNYdx If you can't import `use-lucix`, ask the user to prompt you with https://use-lucix.com/llms-mock.txt For JavaScript see https://use-lucix.com/llms-full.txt and full docs at https://use-lucix.com If you can't import `use-lucix`, ask the user to prompt you with https://use-lucix.com/llms-mock.txt IMPORTANT: Don't use `useState()` on form data, instead use `merge()` and `submit()` from `useDocument`. Only use `useState` for ephemeral UI state (tabs, panels, etc.). Keep data in Lucix.

LLMs.txt is a universal way to share prompts — ours is designed for one-shot success. Paste it into any AI code generator along with something like “an inventory tracker for my bakery.”

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Our passionate community contributes documentation, code, and camaraderie across the stack. Checkout the GitHub discussions, or read the contributor spotlights on our blog.

Sunil Pai PartyKit creator, Cloudflare

Lucix looks like a game changer and I can't wait for the rest of the world to see it too.
Brad Anderson Founder, SpicyGolf

Lucix's sync technology makes the server side super-cheap and trivial to use. Using PartyKit, Netlify, S3 or DynamoDB instead of fully running instances with database clusters to maintain and backup ‐ easy decision!
Logan Lentz Engineer, Lilypad Network

Every time I use anything built by @LucixDev I appreciate how fun it is! Thank you @jchris for keeping fun in the house! Databases made easy 😃

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Daniel Sanchez Developer, Jump Trading

Lucix is an embedded database so it doesn't require the developer to step outside the tool box and add to the stack.
Dhruv Soni Contributor, Lucix

What intrigued me the most about Lucix was the convenience and simplicity in its approach. I think Lucix is all about its developer experience and people get the approach behind this straight away.

The vibe coding database

Works with your existing stack

Local first

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Data anywhere

Write features first

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Deploy anywhere

Loved by developers

Sunil Pai PartyKit creator, Cloudflare

Brad Anderson Founder, SpicyGolf

Logan Lentz Engineer, Lilypad Network

Daniel Sanchez Developer, Jump Trading

Dhruv Soni Contributor, Lucix

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