Lspkit is a Rust toolkit that serves both the Language Server Protocol used by code editors and the Model Context Protocol used by Claude Code, Cursor and Codex from a single engine, according to the project's blog post. The toolkit also profiles that shared engine, letting developers build an MCP server and a language server from one codebase.
Your editor speaks the Language Server Protocol. Claude Code, Cursor and Codex speak MCP. lspkit serves both from one Rust engine, and profiles it too.
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