Codex CLI

The open source repository containing the code for the MCP server is also a Codex CLI plugin marketplace.

The marketplace allows you to install the svelte plugin which will give you the remote MCP server, skills to instruct the LLM on how to properly write Svelte 5 code, and a specialized agent for editing Svelte files.

If possible, we recommend that you instruct the LLM to execute MCP calls with the agent (you can explicitly mention an agent in your message to delegate work to it) when creating or editing .svelte files or .svelte.ts / .svelte.js modules — this will help save context by handling Svelte-specific tasks more efficiently.

Installation

Add the repository as a marketplace from the Codex CLI:

codex plugin marketplace add sveltejs/ai-tools

Then, open the plugin directory from an interactive Codex CLI session:

codex
/plugins

Choose the Svelte marketplace, select the svelte plugin, and install it.

Codex can read the repository's legacy-compatible .claude-plugin/marketplace.json marketplace file, so the same marketplace source works for both Claude Code and Codex CLI.