F# Weekly #24, 2026 — Fable 5.2, Expecto 11 & .NET 11 Preview 5

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Fable 5.1 and 5.2
• Rider 2026.2 EAP 5

Microsoft News

• .NET 11 Preview 5 is now available! – .NET Blog
• .NET at Microsoft Build 2026: Must watch sessions – .NET Blog
• Microsoft Build 2026 recap: vision, launches, and top sessions – Microsoft for Developers
• Join us for .NET Day on Agentic Modernization Livestream – .NET Blog
• Visual Studio Code 1.124
• PowerToys 0.100 is here: new Shortcut Guide, Command Palette improvements and much more! – Windows Command Line
• Windows App Development CLI v0.3.2 — bundling support, smarter initialization, and more – #ifdef Windows
• Review pull requests without leaving Visual Studio – Visual Studio Blog
• Distributed multi-agent systems with Aspire and Microsoft Agent Framework | Aspire Blog
• ICYMI: Inside the Microsoft Agent Framework: How we designed a layered SDK | Microsoft Agent Framework

From the .NET blog…In case you missed it earlier….NET at Microsoft Build 2026: Must watch sessionshttps://devblogs.microsoft.com/dotnet/dotnet-at-microsoft-build-2026/ #dotnet #NETMAUI #AI #ASPNETCore #csharp #NET11 #agenticweb #microsoftbuild #microsoftbuild2026

— Barret Blake (@barretblake.dev) 2026-06-09T01:45:02.1239160+00:00

Video

• Don Syme – The Agentic Repository Automation Revolution – AI Native DevCon June 2026
• Building for the agentic web with .NET 11
• .NET 11 in depth: Runtime, libraries, and SDK for the AI era
• Simplifying .NET Installs with dotnetup
• AI Building Blocks for .NET: Add intelligence to your C# Apps
• Taking your AI to the edge with .NET MAUI – YouTube
• .NET MAUI Community Standup: CoreCLR & Profiling your MAUI app
• On .NET Live – Fluent UI Blazor: The next step

Blogs

• Ian Erik Varatalu: Why Use F# for Scripting and Automation?
• Urs Enzler: Event Sourcing — Non-Bi-Temporal Events in a Bi-Temporal Stream
• Tony Lucca: Designing an AI-Ready Web Architecture with C#, F#, and Sharpino
• Control what your agentic workflows see with integrity filtering

Highlighted Projects

• gnrkr789/dotnet-matplotlib — A native .NET 10 port of Matplotlib in F# — pure-managed plotting (SVG, PNG, PDF) with a pyplot-style API and zero native dependencies.
• HelgeSverre/fedit — A small terminal text editor written in F# with multi-buffer, undo/redo, find, command palette, system clipboard, and seven themes.
• TheFellow/fkyeah — F# pipeline engine for multi-stage AI workflows and LLM orchestration.
• venikman/ACP-inspector — Debug and validate Agent Client Protocol (ACP) traffic — protocol conformance testing for AI coding agents.
• Thorium/FSharp.Azure.Quantum — Make quantum computing available for enterprise .NET developers via Azure Quantum.

New Releases

• Expecto 11.0.0
• Fable 5.2.0
• SQLProvider 1.5.23
• Thoth.Json 10.5.1
• DynamicObj 8.0.0
• Akka.FSharp 1.5.69
• Propulsion 3.0.2
• StarFederation.Datastar.FSharp 1.4.0
• Thoth.Json.Core 0.9.1
• YAMLicious 1.0.0
• XstarS.GuidModule 2.15.0
• Fli 1.1001.0
• Farse 0.12.3
• Feliz.Quill 2.2.0
• Oxpecker.Alpine 0.2.0
• DotnetMatplotlib 0.0.6
• FSharp.Azure.Quantum 1.4.1
• TypedConfig 1.0.0
• fable-lit-fullstack-template 3.0.0
• Mibo.Raylib v1.2.0
• Parquet.FSharp v0.5.0

Here's a cool new feature in the latest @rider.jetbrains.com 2026.2 preview build. Hooks Rider code intelligence into AI agentic workflows. Makes sure that generated code is correct, doesn't introduce warnings or suggestions, and matches your formattingRead more: blog.jetbrains.com/dotnet/2026/…

— Matt Ellis (@citizenmatt.bsky.social) 2026-06-09T11:46:10.852Z

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

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