isaacphi

MCP Language Server — Development skill for Claude Code

Development community

mcp-language-server gives MCP enabled clients access semantic tools like get definition, references, rename, and diagnostics.

How to install MCP Language Server

This entry records only its repository, not the path inside it, so there is no exact command to give. Open isaacphi/mcp-language-server and copy the folder into ~/.claude/skills/, or the file into ~/.claude/agents/.

What MCP Language Server does

mcp-language-server gives MCP enabled clients access semantic tools like get definition, references, rename, and diagnostics.

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README

MCP Language Server

[![Go Tests](https://github.com/isaacphi/mcp-language-server/actions/workflows/go.yml/badge.svg)](https://github.com/isaacphi/mcp-language-server/actions/workflows/go.yml) [![Go Report Card](https://goreportcard.com/badge/github.com/isaacphi/mcp-language-server)](https://goreportcard.com/report/github.com/isaacphi/mcp-language-server) [![GoDoc](https://pkg.go.dev/badge/github.com/isaacphi/mcp-language-server)](https://pkg.go.dev/github.com/isaacphi/mcp-language-server) [![Go Version](https://img.shields.io/github/go-mod/go-version/isaacphi/mcp-language-server)](https://github.com/isaacphi/mcp-language-server/blob/main/go.mod)

This is an [MCP](https://modelcontextprotocol.io/introduction) server that runs and exposes a [language server](https://microsoft.github.io/language-server-protocol/) to LLMs. Not a language server for MCP, whatever that would be.

Demo

`mcp-language-server` helps MCP enabled clients navigate codebases more easily by giving them access semantic tools like get definition, references, rename, and diagnostics.

![Demo](demo.gif)

Setup

Install Go: Follow instructions at https://golang.org/doc/install
Install or update this server: go install github.com/isaacphi/mcp-language-server@latest
Install a language server: follow one of the guides below
Configure your MCP client: follow one of the guides below

Go (gopls)

Install gopls: go install golang.org/x/tools/gopls@latest

Configure your MCP client: This will be different but similar for each client. For Claude Desktop, add the following to ~/Library/Application\ Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "language-server": {
      "command": "mcp-language-server",
      "args": ["--workspace", "/Users/you/dev/yourproject/", "--lsp", "gopls"],
      "env": {
        "PATH": "/opt/homeb