F# Weekly #17, 2026 – Fable 5.0

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Fable 5 has been released

Fable 5 has been released 🎉This is the result of almost 1 year and a half of work from the community and the maintainers.Huge thank you to everyone involved. ❤️#fsharp #fablecompiler

— Maxime (@mangelmaxime.bsky.social) 2026-04-21T15:53:57.143Z

Microsoft News

• .NET 10.0.7 Out-of-Band Security Update
• What’s new for .NET in Ubuntu 26.04
• Writing Node.js addons with .NET Native AOT
• Pin Clustering in .NET MAUI Maps
• Visual Studio Code 1.117
• Announcing TypeScript 7.0 Beta – TypeScript
• Aspire 13.2: Bun Support and Container Enhancements | Aspire Blog

Videos

• The GenPRES project by Casper Bollen
• Third Online Func Prog Sweden 2026
• .NET Data Community Standup: Lightweight Framework to Automate EF Components
• ASP.NET Community Standup: Combining API Versioning with OpenAPI

Blogs

• Urs Enzler: Event Sourcing — Simple is Often Enough
• Samir Parikh: Options in F#

Highlighted projects

• tommililja/Farse — Simple, explicit JSON parsing for F# using System.Text.Json
• fs-fio/fio — A type-safe, purely functional effect system for asynchronous and concurrent F#
• njlr/thoth-json-ce — Computation Expression for building Thoth.Json decoders
• Neftedollar/FsMcp — Idiomatic F# toolkit for building MCP servers and clients with computation expressions and zero boilerplate
• QuickData.FSharp — Public repository for the QuickData.FSharp packages.

New Releases

• Fable 5.0.0
• Oxpecker.Solid 1.0.0
• Oxpecker.Solid.FablePlugin 1.0.0
• FSharp.TypeProviders.Templates 8.9.0
• QuickData.Numbers.FSharp 0.2.1
• Thoth.Json 10.5.0
• Fable.Remoting.Json 3.0.0
• Fable.Elmish.HMR 9.0.0
• Feliz.Bulma 5.0.0
• Feliz.ReactToaster 2.0.0
• Akka.FSharp 1.5.66
• Akka.Persistence.FSharp 1.5.66
• Akkling.Streams 0.18.1
• FSharp.Data.GraphQL.Server 3.1.1
• DatatypeChannels.ASB 3.1.31
• EasyBuild.ShipIt 2.3.0

Oxpecker.Solid 1.0 has been released with Fable 5 support #fsharp #oxpecker

— Vladimir Shchur (@lanayx.bsky.social) 2026-04-24T03:04:34.954Z

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

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