F# Weekly #27, 2026 — Fable 5.5, SkiaSharp 4 & Orleans.FSharp 3.0

Welcome to F# Weekly,

A roundup of F# content from this past week:

Microsoft News

• .NET 8 and .NET 9 will reach End of Support on November 10, 2026
• MCP Beyond the Chat Window: Build Diagnostics in CI
• SkiaSharp 4.0 is here: announcing the first stable release
• Packaging and Package Identity for .NET apps with WinApp CLI on Windows
• Visual Studio Code 1.127
• Access GitHub Copilot in JetBrains – GitHub Copilot Is Now a Native Agent in JetBrains AI Assistant
• Visual Studio June Update – Track Your Usage, Trust Your Tools – Visual Studio Blog
• Automating your Visual Studio extension builds with GitHub Actions – Visual Studio Blog

Videos

• Xah Talk Show Ep800. learning fsharp with ai, walk dir. find string. call shell command.
• .NET AI Community Standup: Why Orleans for AI Agents
• .NET MAUI Community Standup: SkiaSharp 4 has arrived!
• .NET Day of Agentic Modernization 2026

Highlighted projects

• FidelityFramework/Composer: A compiler that brings F#’s elegance and precision to systems programming through MLIR and various backends
• Lanayx/Oxpecker: Backend and Frontend F# frameworks
• fs-fio/fio: 🪻 A Type-Safe, Purely Functional Effect System for F#
• tommililja/Farse: Simple, explicit JSON parsing for F# using System.Text.Json
• myowndb/myowndb: This is the code powering MyOwnDB. It is shared under the AGPL v3 license.
• It is developed with the F# language.

New Releases

Fable 5.5 is out 🎉This release have a strong focus on fixing bug for JavaScript/TypeScript targets.It is also trying to make writing cross-target code easier. Thanks to `Compiler.is*` target detection as an alternative to compiler directives.github.com/fable-compil…#fsharp #fablecompiler

— Maxime (@mangelmaxime.bsky.social) 2026-07-01T09:32:14.418Z

• Fable 5.5.0
• F# Tree-sitter 0.3.1
• Fuuga 1.0.12
• Prismatic 1.0.51
• Akka.FSharp 1.5.70
• Hedgehog 2.0.4
• WebSharper.Compiler 10.1.6.676
• Rezoom.SQL.Provider.SQLite 1.1.0
• PersistedConcurrentSortedList 10.1.301.3
• Euclid 0.42.0
• SQLProvider.PostgreSql 1.5.25
• Songhay.Modules 10.0.0
• FSharp.Compiler.SyntaxTreeX 43.12.204
• HeterogeneousCollections 1.1.5
• ShapeSifter 1.1.25
• Farse 0.12.4
• FSharp.Azure.Quantum 1.4.4
• FAkka.Akka.FSharp 1.5.69
• FAkka.Akkling 1.569.101.301
• FSharp.ReactiveWpf 0.0.13
• FSharp.Azure.Quantum.Topological 0.4.4
• Fss-lib.Builder 3.0.1
• FsLangMcp 0.12.1
• Numerics.NET.FSharp 10.6.0
• TestPrune.Falco 2.0.3
• Frank.Analyzers 7.2.1
• DotnetMatplotlib 0.0.9
• Orleans.FSharp 3.0.1
• CrawlSage 0.2.0
• Yog.FSharp 0.6.0
• Faket 0.1.0
• Hegel 0.1.3

Mibo v2.0.0-rc-001 is out!Docs, samples and most things have been updated, templates are wip and will likely land soon. #dotnet #fsharp #gamedev #monogame #raylib

— Angel Munoz (@tunaxor.me) 2026-07-02T05:39:39.627Z

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

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