01 · Find
Follow the real symbol
Definitions, references, member calls and record-field writes across every project in the solution — without comments and same-name noise.
FsLangMCP 0.17 · semantic tooling over MCP
Stop grepping F#.Give your agent the compiler.
Cross-project symbol search, trustworthy type-check verdicts, refactor previews and project-aware diagnostics — shaped for an AI coding agent, backed by FCS and FsAutoComplete.
- Compiler-resolved
- Cross-project
- Honest about incomplete evidence
agent› understand this F# solution
set_project Quickstart.slnx
✓ 2 projects ready
check workspace
✓ clean · fresh compiler evidence
find Order · all sites
17 semantic sites · 9 across project boundaries
The difference
Text sees spelling. The compiler sees meaning.
F# depends on partial application, shadowing, aliased opens, computation expressions and compile order. FsLangMCP exposes that semantic model directly to the agent.
02 · Check
Know whether the edit compiles
A fresh clean, errors or unknown verdict. Missing coverage is reported instead of being mistaken for success.
03 · Plan
Preview the blast radius
Rename, public API, compile order, likely tests and dead-code candidates before the agent changes a file.
A real session
One small loop: initialize, check, find.
The demo runs against the repository's two-project quickstart. The result is real tool output, not a staged mock.
find resolves 17 Order sites, including nine in a project that a grep scoped to Domain never sees.Designed for agent routing
Fewer guesses between intent and evidence.
35agent-facing tools
2semantic bridges: FCS + FSAC
3honest check verdicts
The core surface stays simple: start with find and check, then reach for specialized tools only when the task calls for them.
Ready when your agent is
Install one .NET tool. Start with find and check.
dotnet tool install -g FsLangMcpthenfslangmcp --bootstrap-tools