OpenCode has a [plugin system](https://opencode.ai/docs/plugins/) that allows developers to add MCP servers, agents and commands programmatically. Svelte has an OpenCode plugin published under `@sveltejs/opencode`.

## Installation

To install the plugin in OpenCode you can edit your [OpenCode config]() (either the global or the local one), adding `@sveltejs/opencode` to the list of plugins.

```json
{
	"$schema": "https://opencode.ai/config.json",
	"plugin": ["@sveltejs/opencode"]
}
```

That's it! You now have the Svelte MCP server and the [file editor subagent](opencode-subagent) configured for you.

## Configuration

The default configuration for the Svelte OpenCode plugin looks like this...

```json
{
	"$schema": "https://raw.githubusercontent.com/sveltejs/mcp/refs/heads/main/packages/opencode/schema.json",
	"mcp": {
		"type": "remote",
		"enabled": true
	},
	"subagent": {
		"enabled": true
	}
}
```

...but if you prefer, you can enable only the subagent, only the MCP, or configure the kind of MCP server you want to use (`local` or `remote`).

You can place this file in `~/.config/opencode/svelte.json` or, if you have an `OPENCODE_CONFIG_DIR` environment variable specified, at `$OPENCODE_CONFIG_DIR/svelte.json`.