F# Weekly #22, 2025 – Ionide with Cursor

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Announcing dotnet run app.cs – A simpler way to start with C# and .NET 10 – .NET Blog
• Semantic Kernel and Microsoft.Extensions.AI: Better Together, Part 2 | Semantic Kernel
• Semantic Kernel: Multi-agent Orchestration | Semantic Kernel
• Circuit Breaker Policy Fine-tuning Best Practice – .NET Blog
• Fine-tune the volume of logs your app produces – .NET Blog

Videos

• ASP.NET Community Standup – Passwordless authentication with Passkeys in .NET 10
• AspiriFridays with David, Damian, and Maddy – Bitwarden
• csproj is GONE! ‘dotnet run app.cs’ is Here

Blogs

• Maximum Likelihood estimation with Quipu, part 1 · Mathias Brandewinder blog
• Are Interfaces and Records the same thing? | Compositional IT
• The Twilight of Lazy Lock-in – Houston Haynes
• From C# to Rust: A 42-Day Developer Challenge – Chris Woody Woodruff

You can now use F# and Ionide with @cursor.com.web.brid.gy 🥰 #fsharp #fable github.com/ionide/ionid…

— Dag Brattli (@dbrattli.bsky.social) 2025-05-31T05:34:29.073Z

F# vNext:

• Check for C# extension dependencies at runtime by dbrattli · Pull Request #2088 · ionide/ionide-vscode-fsharp · GitHub
• Display type defaulting · Issue #1427 · fsharp/fslang-suggestions
• “Like” string active pattern · Issue #1426 · fsharp/fslang-suggestions
• Allow fields with `[<DefaultValue>]` attribute in records · Issue #1425 · fsharp/fslang-suggestions
• when ‘T : default · Issue #1423 · fsharp/fslang-suggestions
• Result module regularity with option/voption · Issue #1422 · fsharp/fslang-suggestions
• Type-directed resolution of numeric and string literals, and extending `B` string suffix to be UTF8 strings · Issue #1421 · fsharp/fslang-suggestions

Highlighted projects

• CaptnCodr/Fli: Execute CLI commands from your F# code in F# style!
• AngelMunoz/Vuoso – Vue Bindings for Fable

New Releases

• Oxpecker.Solid 0.8.1
• Farmer 1.9.16
• WebSharper 9.1.2.559
• WebSharper.FSharp 9.1.2.559
• Rhino.Scripting.FSharp 0.12.1
• Fantomas.FCS 7.0.2
• fantomas 7.0.2
• DbFun.Core 2.1.2
• Fli 1.111.11
• Farse 0.1.3-alpha
• ARCtrl 3.0.0-alpha.4
• Terminal.Gui 2.0.0-prealpha.1985

We released #fantomas 7.0.2 with some fixes and improvements.https://github.com/fsprojects/fantomas/releases/tag/v7.0.2#fsharp #dotnet

— dawe (@dawe.fosstodon.org.ap.brid.gy) 2025-05-28T18:31:24.000Z

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

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