Neftedollar/FsLangMCP
View on GitHub ↗Semantic F# for AI coding agents (Claude Code · Cursor · Copilot · Codex) — an MCP server that gives LLMs real FCS/FSAC compiler intelligence (find, check, types, rename) instead of grepping F#.
25 ★2 forksF#Updated 1mo ago
What you need to know
A semantic F# MCP server with 35 tools that uses the real F# compiler (FCS in-process + FSAC LSP) for cross-project find, check, types, rename preview, dead-code, diagnostics and code actions, instead of grepping.
Install
dotnet tool install -g FsLangMcp fslangmcp --bootstrap-tools
Usage
- •set_project with your .fsproj or .sln, then call find or check
- •Use fcs_rename_preview to preview a semantic rename without writing
Key features
- ✓35 tools in 8 groups
- ✓Cross-project semantic find, trustworthy check verdicts
- ✓Diagnostic explanations, suggested opens, code-action fixes
- ✓Rename/refactor impact preview, dead-code and public API surface
- ✓Raw LSP endpoints for completion, formatting, code actions and rename
Best for
F# agents that need compiler-grade semantics instead of text search
Caveats
- ⚠Requires .NET SDK 10+
- ⚠LSP proxy tools are serialized and can be slow to become race-ready on first load
Platforms: Windows · Linux · macOSClients: Claude Code · any MCP client
Reviewed 2026-08-11
Topics
agentic-aiai-agentsclaudecode-intelligencecopilotcursordeveloper-toolsdotnetfsautocompletefsharpfsharp-compiler-servicelanguage-serverllmmcpmodel-context-protocol
- Stars
- 25★
- Forks
- 2
- Language
- F#
- License
- MIT
- Created
- 2026-04-05
- Last push
- 2026-08-17