F# Weekly #31, 2026 — MCP C# SDK v2.0, Unit-Test Agent, and MSBuild Binlog in VS Code

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• What’s new in 2.0 | Elmish Land

Microsoft News

• Announcing v2.0 of the official MCP C# SDK
• From generated code to trusted code with a unit-test agent
• Analyze MSBuild Binary Logs with Copilot in VS Code
• Discover Agent Skills from MCP servers in .NET | Microsoft Agent Framework
• Visual Studio July Update — Meet the New Agent, Powered by the GitHub Copilot SDK – Visual Studio Blog
• Building agent teams with Agent Framework, GitHub Copilot CLI and Squad | Microsoft Agent Framework

Friendly reminder that the F# unofficial discord exists and you should join if you're interested in the language and want to get help from time to time with it discord.gg/VyPK46fcz#dotnet #fsharp #programming #developers #webdev

— Angel Munoz (@tunaxor.me) 2026-07-24T05:57:14.791Z

Videos

• Enterprise AI Patterns for .NET Developers
• Xah Talk Show Ep810. on why ocaml fsharp are best langs. cpp worst.

Blogs

• Designing a C#-friendly Result type (not just an F# port) – Romain Deneau

Highlighted projects

• visorcraft/MongrelDB-FSharp — Pure F# client for MongrelDB – embedded and server database with SQL, vector search, full-text search, and AI-native retrieval
• adz/Axial — An F# library for typed results, explicit context, and async/task interop
• fable-hub/Fable.Reactive — Async Reactive (Rx) for F# and Fable
• dbrattli/Fable.Giraffe — Giraffe for Fable (Python, BEAM, and Node)
• RyushiAok/FsHcl — A typed HCL generation DSL for F#
• krymtkts/SnippetPredictor — A command-line predictor written in F# that suggests code snippets based on the input

New Releases

• Mibo 3.0.0
• BlackFox.MasterOfFoo 2.1.2
• WoofWare.Myriad.Plugins 11.0.3
• FSharp.ReactiveWpf 0.1.3
• FSharp.PureAnalyzer 0.3.2
• Fuuga 1.0.18
• SageTUI 0.9.7
• Euclid.Rhino 0.51.0
• Feather.Grpc 1.1.0
• Kawa.FSharp 0.4.0

Multi-room, AI decision trees, skills in placeIt's finally coming all together 😅. I almost close the gap with my original prototypeTest plays with my wife and two sons.#dotnet #fsharp #monogame #gamedev

— Angel Munoz (@tunaxor.me) 2026-07-29T02:53:15.751Z

That’s all for now. Have a great week.

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