# Themes and extensions

> Pick a theme, install Zed themes and languages, and manage extensions.

## Themes

Rexa ships one theme, **Deep Space**. More themes come from Zed theme extensions.

- **Pick a theme** in **Settings → General → Appearance → Theme**, or run **theme: switch** for a live preview. Your choice is saved as `theme.name`.
- **Install a theme** with **Install theme…** in the same list. It opens the extension installer filtered to themes.
- **Use a theme file** with `theme.path`, pointing at a Zed theme JSON file or extension folder.
- **Adjust colors** with `theme.overrides`, using Zed theme color keys.

```json [settings.json]
{
  "theme": {
    "name": "One Dark",
    "overrides": { "editor.background": "#101014" }
  }
}
```

## Extensions

Open **Extensions** from the button at the bottom of the Projects sidebar. Filter by **All**, **Rexa** or **Zed**, and enable, disable, update or remove each one.

### Bundled extensions

The agent adapters for Claude Code, Codex, Cursor Agent, OpenCode and Pi ship with Rexa. You can disable them but not remove them. See [Supported agents](/docs/agents/supported-agents).

### Zed extensions

Rexa installs extensions from Zed's registry and uses their:

- **Themes**
- **Languages and grammars** for syntax highlighting and the symbol outline
- **Language servers**, downloaded by the extension

Run **extensions: install** from the command palette, search, and press <Kbd>↵</Kbd>. Narrow the list with `kind:theme` or `store:zed`. Installed extensions live in `~/.config/rexa/zed-extensions/`.

Extensions you installed in the Zed app also appear, as `zed-local:<id>`, and start disabled, except theme-only ones.

<Callout type="warning">
  A language server installed by an extension runs with your user's permissions. Install extensions you trust.
</Callout>

Zed context servers, debug adapters and icon themes are not supported.

### From the command line

```bash [Terminal]
rexa extension ls                    # installed extensions
rexa extension search zed:python     # search the Zed registry
rexa extension install zed:catppuccin
rexa extension outdated              # Zed extensions with newer releases
rexa extension disable <id>
rexa extension remove <id>
```

### Local extensions

`rexa extension install <path>` installs a Rexa extension from a folder, as a link (or a copy with `--copy`). There is no registry for Rexa extensions yet.