gopls-mcp

Give your AI Agent the compiler's brain, not a text searcher.

Documentation: https://gopls-mcp.org

gopls-mcp delivers type-checker-level semantic analysis directly to your LLM. Unlike text search, it resolves Go's type system — interface satisfaction, cross-package identity, and shadowed scopes — with the same precision as the compiler.

Where it pays off most is on semantic tasks: finding all concrete types that implement an interface, tracing call hierarchies, and mapping package dependencies. A benchmark over 11 tasks shows gopls-mcp uses 2–4× fewer tool calls and finishes faster than grep-based navigation on those tasks. For simple same-file lookups, plain bash/grep remains equally effective and carries less overhead.

Contribute

The project is actively developing, and feel free to raise PRs or issues if you find anything to improve. AI generated code will also be accepted but do remember to narrow the change to a specific feature for reviewer to quickly review them.

Disclaimer: gopls-mcp is a fork of gopls and is a community-driven project. It is not an official Go team product and is not affiliated with or endorsed by Google LLC. This project is licensed under the same BSD license as its upstream source.

Install

Claude Code (plugin — recommended)

/plugin marketplace add https://github.com/xieyuschen/gopls-mcp.git
/plugin install gopls-mcp

The plugin automatically installs the binary and injects the routing skill — no manual setup required.

Codex (plugin — recommended)

codex plugin marketplace add https://github.com/xieyuschen/gopls-mcp.git
codex plugin add gopls-mcp

Manual install (all clients)

Linux / macOS:

curl -sSL https://gopls-mcp.org/install.sh | bash

Windows (PowerShell):

irm https://gopls-mcp.org/install.ps1 | iex

Then follow the per-client setup at https://gopls-mcp.org/quick-start.