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

# Adding Components

Plugins consist of one or more components that provide different functionalities to LangBot. Currently supported component types include:

* Event Listeners (EventListener): Listen to events during pipeline execution and modify context or pipelines.
* Commands (Command): Triggered by user command messages starting with `!` (or other configured prefixes).
* Tools (Tool): Called by LLMs during execution of LangBot's built-in Local Agent.
* Knowledge Engines (KnowledgeEngine): Provide knowledge base indexing and retrieval capabilities for LangBot, managing document ingestion, retrieval, and deletion.
* Parsers (Parser): Parse binary files such as PDF, Word, etc. into structured text before document ingestion, for use by Knowledge Engines.
* Pages (Page): Register custom visual pages in the LangBot WebUI sidebar, providing admin panels, data displays, and interactive interfaces.

## Adding Components

Execute the command in the plugin directory:

```bash theme={null}
lbp comp <component_type>
```

For example, to add an event listener:

```bash theme={null}
lbp comp EventListener
```

Follow the prompts to enter the component configuration (if any).

```bash theme={null}
➜  HelloPlugin > lbp comp EventListener
Generating component EventListener...
Component EventListener generated successfully.
组件 EventListener 生成成功。
➜  HelloPlugin >
```

<Info title="">
  The CLI will generate a `components` directory in the plugin directory and create corresponding component directories within it.

  ```
  .
  ├── assets
  │   └── icon.svg
  ├── components
  │   ├── __init__.py
  │   └── event_listener
  │       ├── __init__.py
  │       ├── default.py
  │       └── default.yaml
  ├── main.py
  ├── manifest.yaml
  ├── README.md
  └── requirements.txt
  ```

  At the same time, component discovery configuration will be added to the plugin's `manifest.yaml`:

  ```yaml theme={null}
  ...
  components:
      EventListener:
        fromDirs:
        - path: components/event_listener/
  ...
  ```

  To remove components, you can delete the corresponding information manually.
</Info>

## Component Types

For detailed usage of each component, please refer to:

* [EventListener](./event-listener)
* [Command](./command)
* [Tool](./tool)
* [KnowledgeEngine](./knowledge-engine)
* [Parser](./parser)
* [Page](./page)