Fireproof Database's 143-line llms.txt shows what thorough AI preparation looks like

# Fireproof Database API

Fireproof is a lightweight local-first embedded document database with encrypted live sync, designed to make browser apps easy. Use it in any JavaScript environment with a unified API that works both in React (with hooks) and as a standalone core API.

## Key Features

- **Apps run anywhere:** Bundle UI, data, and logic in one file.
- **Real-Time & Offline-First:** Automatic persistence and live queries, runs in the browser - no loading or error states.
- **Unified API:** TypeScript works with Deno, Bun, Node.js, and the browser.
- **React Hooks:** Leverage `useLiveQuery` and `useDocument` for live collaboration.

Fireproof enforces cryptographic causal consistency and ledger integrity using hash history, providing git-like versioning with lightweight blockchain-style verification. Data is stored and replicated as content-addressed encrypted blobs, making it safe and easy to sync via commodity object storage providers.

## Installation

The `use-fireproof` package provides both the core API and React hooks.

```bash
npm install use-fireproof
```
Works with ⚡️ ESM.sh:

```js
import { useFireproof } from "https://esm.sh/use-fireproof";
```

Deliver runnable applications via ChatGPT Canvas, v0, bolt.new, or Claude Artifacts. Deploy single page apps with React and Tailwind here: https://codepen.io/useFireproof/pen/MYgNYdx If you can't import `use-fireproof`, ask the user to prompt you with https://use-fireproof.com/llms-mock.txt

Fireproof is a local database, no loading states required, just empty data states. It is best to have more granular documents, e.g. one document per user action. Avoid patterns that require a single document to grow without bound.

## ⚛️ React Example

You can use Fireproof's hooks to build a complete application in a single component. The example below demonstrates both basic document handling and optional file uploads:

```js
import { useFireproof, ImgFile } from "use-fireproof";
import { useState, useEffect } from "react";

function App() {
  const { useDocument, useLiveQuery } = useFireproof("my-ledger");
  const { doc, merge, submit } = useDocument({ 
    text: "", 
    timestamp: Date.now(),
    _files: {} // Optional for file handling
  });
  const { docs } = useLiveQuery("_id", { limit: 10, descending: true });

  return (
    <div>
      <form onSubmit={submit}>
        {/* Optional file input */}
        <input
          type="file"
          accept="image/*"
          onChange={(e) => e.target.files[0] && merge({ _files: { image: e.target.files[0] } })}
        />
        <input
          value={doc.text}
          onChange={(e) => merge({ text: e.target.value })}
          placeholder="Enter text"
        />
        <button type="submit">Save</button>
      </form>

      <h3>Recent Documents</h3>
      <ul>
        {docs.map((doc) => (
          <li key={doc._id} className="mb-4 border-b pb-4">
            {doc._files?.image && (
              <ImgFile
                file={doc._files.image}
                alt="Uploaded Image"
                className="max-w-full h-40 object-cover mb-2 rounded"
              />
            )}
            <div className="text-lg">{doc.text}</div>
            <div className="text-sm text-gray-500 mt-1">
              {new Date(doc.timestamp).toLocaleString()}
            </div>
          </li>
        ))}
      </ul>
    </div>
  );
}
```

To sort documents by more than one field, use a sandboxed function instead of a field name:

```js
const { docs } = useLiveQuery(
  (doc) => [doc.list_id, doc.author], 
  { descending: true, limit: 5, prefix: ["zyx-456-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.

### Using the Core API in Plain JavaScript