> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sdk.fdo.alexvwan.me/llms.txt
> Use this file to discover all available pages before exploring further.

# Quickstart

> Build your first FDO SDK plugin with the smallest possible setup.

# Quickstart

This is the fastest path to a working plugin.

## What You Need To Know First

FDO plugins have two runtimes:

* backend runtime
* iframe UI runtime

Your plugin class, handlers, storage, and logging run in backend runtime.
Your UI runs later inside a sandboxed iframe.

That is the core rule behind the SDK.

## Smallest Valid Plugin

```ts theme={null}
import { FDO_SDK, FDOInterface, PluginMetadata } from "@anikitenko/fdo-sdk";

export default class MyPlugin extends FDO_SDK implements FDOInterface {
  private readonly _metadata: PluginMetadata = {
    name: "My Plugin",
    version: "1.0.0",
    author: "Your Name",
    description: "My first plugin",
    icon: "cog",
  };

  get metadata(): PluginMetadata {
    return this._metadata;
  }

  init(): void {
    this.info("Plugin initialized");
  }

  render(): string {
    return `<div>Hello from FDO SDK</div>`;
  }
}
```

## Start With Fixtures

If you are building a real plugin, start from:

* `examples/fixtures/minimal-plugin.fixture.ts`
* `examples/fixtures/error-handling-plugin.fixture.ts`
* `examples/fixtures/storage-plugin.fixture.ts`

## What To Read Next

* [Basics](/getting-started/basics)
* [Learning Path](/getting-started/learning-path)
* [Runtime Model](/guides/runtime-model)