> ## Documentation Index
> Fetch the complete documentation index at: https://mintlify.com/killlowkey/claude-code/llms.txt
> Use this file to discover all available pages before exploring further.

# Configuration Commands

> Manage Claude Code settings from the REPL.

Several slash commands let you view and change Claude Code's behavior without leaving the terminal.

## /config

Open the interactive settings panel (also aliased as `/settings`):

```
> /config
```

This opens a full-screen interactive UI where you can navigate and change all Claude Code settings — model, permission mode, theme, vim mode, and more. Navigate with arrow keys; changes take effect immediately.

## /model

Switch between available Claude models mid-session:

```
> /model
```

Claude Code supports all models available on your Anthropic account.

## /theme

Change the terminal color theme:

```
> /theme
```

Pick from available themes to adjust syntax highlighting and UI colors.

## /vim

Toggle vim keybinding mode for the input prompt:

```
> /vim
```

In vim mode, use normal vim motions (`h j k l`, `w b`, `0 $`, etc.) to navigate and edit your input.

## /effort

Adjust Claude's reasoning effort level:

```
> /effort
```

Higher effort enables extended thinking for complex problems. Lower effort gives faster responses for simple tasks.

## /output-style

Change how Claude formats its responses:

```
> /output-style
```

Options include different verbosity levels and formatting preferences.

## /cost

View token usage and estimated cost for the current session:

```
> /cost
```

This shows input tokens, output tokens, and running cost based on the active model's pricing.

## /doctor

Diagnose your environment:

```
> /doctor
```

The doctor command checks:

* Anthropic API authentication status
* Network connectivity to Anthropic endpoints
* Git installation and configuration
* Node.js / Bun runtime version
* Claude Code version and available updates
* MCP server connectivity (if configured)

<Tip>
  Run `/doctor` first whenever something isn't working as expected — it catches most common configuration issues.
</Tip>

## /upgrade

Upgrade Claude Code to the latest version:

```
> /upgrade
```

This downloads and installs the latest release. You can also upgrade manually:

```bash theme={null}
npm install -g @anthropic-ai/claude-code
```