> ## Documentation index
> Fetch the complete documentation index at: https://billf-lspmux-cc.docs7.io/llms.txt
> Ask it with GET https://billf-lspmux-cc.docs7.io/ask?q=<keywords or question>. Short keywords rank best.
> Use these to discover all available pages before exploring further.

# Introduction

> Share rust-analyzer across editors and coding agents

`lspmux-cc` shares one `rust-analyzer` instance across editors and MCP-capable agents in the same Rust workspace. It combines [lspmux](https://codeberg.org/p2502/lspmux) with an MCP server and a Claude Code plugin.

## Installation

The manual installation requires macOS or Linux, a Rust toolchain, `jq`, and `rust-analyzer`. Install the MCP server and configure lspmux from a checkout:

```sh
cargo install --path mcp-server
./setup core
./setup doctor
```

Alternatively, use `nix build` to build the MCP server or `nix build .#plugin` to build the Claude Code plugin.

## MCP tools

The server exposes read-only Rust tools including diagnostics, hover, definitions, references, symbols, code actions, and rename. Code actions and rename return edits without applying them. Position inputs are zero-based; returned locations are one-based. File paths must be absolute.

For configuration, host integration guides, and the full tool list, see the [repository README](https://github.com/billf/lspmux-cc#readme).