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

# Custom Commands

> Create custom commands to fulfill you specific needs

Selected allows you to customize commands in two ways:

1. **Customize built-in commands** - Modify the prompts of any of the customizable built-in commands with your own version to fulfill your specific needs. You can reset them to default at any time.
2. **Create custom commands** - Build entirely new commands for your daily tasks that aren't covered by the built-in commands.

## Command Structure

Each command consists of two key components:

* **System prompt** - Defines the overall behavior and role of the command
* **User prompt** - Specifies what to do with the input (selected text, attachments, custom prompt)

You can use variables in your prompts to reference:

* Selected text (`{{selectedText}}`)
* Attachment text (`{{attachmentText}}`)
* Custom input from the user (`{{inputtedText}}`)

All available variables can be found in the Variables section of the Commands tab. You can add your own ones if needed.

## Example: Prompt Optimizer

Here's an example of a custom command that optimizes prompts for AI models:

<Frame>
  <img className="rounded-xl" src="https://mintcdn.com/selectedai/iYhzOEnjoctGIUfL/images/custom-commands.png?fit=max&auto=format&n=iYhzOEnjoctGIUfL&q=85&s=8847f6dd32c88f5731cd223768b70066" alt="Custom Commands settings showing command customization interface" width="1476" height="1040" data-path="images/custom-commands.png" />
</Frame>

1. **Name:** Prompt Optimizer
2. **Icon:** Choose an icon that represents your command
3. **Conditions:**
   * Selected text: required
   * Attachment: ignored
   * Inputted text (Custom prompt): ignored
4. **System prompt:**
   ```
   You're a great LLM Prompt Optimizer! Help me optimize the
   following prompt:
   ```
5. **User prompt:**

   ```
   The raw prompt to be optimized is as:

   {{selectedText}}
   ```