F# Weekly #45, 2026 – F# in the $12 Server Challenge

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Serde.FS 1.0 is out
• FSharp.CloudEdge

Microsoft News

• Get Ready for .NET Conf 2026!
• Help Shape the Future of .NET: Take the 2026 .NET Developer Survey
• Delivering Skills in NuGet packages
• Modernize your .NET apps for Windows Arm64 with GitHub Copilot
• GitHub Copilot in JetBrains Air: Plugin vs. Agent
• Publish Visual Studio Marketplace extensions securely with Trusted Publishing
• Intelligent Terminal Sidebar Brings New Capabilities

Videos

• My F# Server Is #2 Out of 98 in the $12 Server Challenge – YouTube
• F# basics: let bindings, immutability and expressions – YouTube
• Getting Started with SharpLsp | F# & C# in VS Code – YouTube
• F# Programming in VS Code | SharpLsp .NET Language Support – YouTube

Blogs

• Study notes: automatic differentiation (part 3) · Mathias Brandewinder blog
• Kentaro Inomata: Effect handlers in F#, despite no delimited continuations, GADTs, HKTs or row polymorphism. Ported from Koka, Effekt, Unison, OCaml, Polysem

Highlighted projects

• dotnet-websharper/core: WebSharper – Full-stack, functional, reactive web apps and microservices in F# and C#
• serde-fs/Serde.FS: A deterministic, reflection‑free serialization and RPC platform for F#. Powered by Serde‑style source generation for .NET and (soon) Fable.
• cmeeren/BatchIt: Call batched functions as normal functions
• l0ng-ai/openidea: The IDE you know, rebuilt in Rust.

For those of you who work with #fsharp and #dotnet and want to have a good @cloudflare-dev.bsky.social experience, FSharp.CloudEdge was just bumped to 0.1.1 with Pi Agents support.

— Braidpoint (@braidpoint.bsky.social) 2026-10-29T14:18:24.314Z

New Releases

• Fable 5.27.0
• WebSharper 10.1.10.687
• SQLProvider 1.5.30
• fsprojects/fantomas v8.1.1
• dotnet-fsharplint 0.27.2
• SageFs 0.6.938
• BatchIt 2.0.0
• Serde.FS 1.0.1

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