F# Weekly #25, 2026 — Expecto 11.1 & Fable 5.3

Welcome to F# Weekly,

A roundup of F# content from this past week:

Microsoft News

• AI-Powered MSBuild Investigation with the Microsoft Binlog MCP Server
• .NET at Microsoft Build 2026: Must Watch Sessions
• GitHub Copilot for JetBrains is moving to Copilot CLI as the default agent harness – Microsoft for Java Developers
• Announcing TypeScript 7.0 RC – TypeScript
• Visual Studio Code 1.125
• Use your own language model key in VS Code
• Make Visual Studio look the way you want – Visual Studio Blog
• Aspire in VS Code: the 13.4 developer loop | Aspire Blog
• Improving token efficiency for GitHub Copilot in VS Code
• Intelligent Terminal 0.1.1 is here: bash support, new slash commands, and more customization – Windows Command Line

Videos

• Introducing F#/Elm to a C#/JS Organization — Hazards and Wins — Func Prog Sweden
• Fifth Online Func Prog Sweden 2026 — Func Prog Sweden
• .NET Day of Agentic Modernization 2026 — .NET
• .NET AI Community Standup: Multi-Agent Apps with Aspire + MAF — .NET
• ASP.NET Community Standup: Boosting Razor Productivity — .NET
• On .NET Live – Demystifying Microsoft Agent Framework Middleware — .NET

Blogs

• SharpLsp Team — Why F# Is First-Class in SharpLsp
• Vladimir Shchur — Meet Oxpecker.Alpine and Oxpecker.Htmx beta
• Urs Enzler: Event Sourcing — Temporally Misplaced or Duplicated Events
• Romain Deneau — A real-world F# computation expression: short-circuiting computations

A short update about Oxpecker extension librariesmedium.com/@lanayx/meet…#fsharp #htmx #alpinejs #oxpecker

— Vladimir Shchur (@lanayx.bsky.social) 2026-06-18T15:30:56.965Z

Highlighted projects

• ScottArbeit/Grace — Grace Version Control System: a cloud-native, actor-model VCS built with F# and Orleans
• litesig/litecoin-multisig — Seven F# modules compiled to JavaScript via Fable, covering the full stack from BIP39 seed phrases to signed-and-broadcast PSBTs.
• HelgeSverre/mire — A retained-mode F# TUI runtime with diff-based rendering and Elmish/TEA loop for .NET 10
• gnrkr789/CrawlSage — An F#-first web crawling & scraping framework for .NET with HTML parsing DSL and polite-by-default crawl ops
• agentruntimecontrolprotocol/fsharp-sdk — F# / .NET reference SDK for ARCP (Agent Runtime Control Protocol)

New Releases

• NBomber.Contracts 6.2.1
• Expecto 11.1.0
• Fable 5.3.0
• Expecto.FsCheck 11.1.0
• DynamicObj 8.0.0
• SQLProvider 1.5.24
• Expecto.BenchmarkDotNet 11.1.0
• fsharp-analyzers 0.37.2
• Expecto.Hopac 11.1.0
• Akka.Persistence.FSharp 1.5.69
• Expecto.Diff 11.1.0
• Funogram 3.0.4
• FS.FluentUI 4.0.0
• fable-lit-fullstack-template 3.1.0
• TestPrune 4.3.0
• FunStripe.Core 2.1.0
• AgentNet 0.1.0
• CommandTree 0.7.0
• Falco.UnionRoutes 0.3.3
• Mire 0.7.0
• Mibo.Raylib v1.3.0

🚀 NBomber Studio 0.8.0 is out!lnkd.in/dQ6Jv8x8Highlights: • ⏰ Scheduled load test execution • ☸️ Enhanced Kubernetes Container Spec support • 🔐 More flexible auth configuration#dotnet #loadtesting #performance #devtools #nbomber #csharp #fsharp #testing #QA

— Anton Moldovan (@antyadev.bsky.social) 2026-06-19T19:32:12.977Z

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

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