F# Weekly #38, 2026 — Fantomas 8.0, Myriad 1.0 and Fable.Ripple

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Fantomas 8.0.0 is released
• Myriad 1.0.0 — the F# code generator reaches 1.0
• Fable.Ripple – Fine-grained reactive libraries for Fable applications.

Fantomas 8 got releases! #fsharphttps://t.co/Qb7IpCqHim

Some highlights: https://t.co/tlopYHd4al pic.twitter.com/3QhEgcDSGV

— Florian Verdonck (nojaf) (@verdonckflorian) September 15, 2026

Microsoft News

• Performance Improvements in .NET 11
• Build Your Own AI Agent Harness in C#, the MafClaw Live Series
• Share your .NET story with the community
• .NET Conf 2026 Community Days Call for Presenters Is Open – .NET Blog
• Today I will… improve test coverage – Visual Studio Blog
• Power Platform CLI ❤️ Power Platform API | Power Platform Developer Blog
• Build an interview coach app with the GitHub Copilot SDK – Microsoft for Developers
• Intelligent Terminal 0.2.2572: Faster, Smoother, and More Reliable – Windows Command Line

Videos

• Scaling the Claw: Skills, Shell, CodeAct and Background Agents
• Michal Lusiak – Developer Friendly Machine Learning with F# – NewCrafts 2018 – YouTube
• Jérémie Chassaing – Ukulele tabs in F# – NewCrafts 2018 – YouTube

Blogs

• Fantomas: Doctor doctor please – Florian Verdonck
• Mathias Brandewinder: Correcting an additive model
• Alex Nedelcu: Executable scripts with dependencies

Highlighted projects

• fable-hub/Fable.Ripple – Fine-grained reactive libraries for Fable applications.
• ChrSt/FsMatrix: a deliberately simple F# Matrix client — log in, send a message, done.
• MoiraeSoftware/Myriad: the F# code generator, shipping its long-awaited 1.0.0 release.
• adz/Reified: declare value and model invariants once, then derive validation, parsing, codecs, contracts and test data.

New Releases

• fantomas 8.0.0
• Myriad 1.0.0
• Fable 5.17.2
• WebSharper 10.1.6.677
• FsLexYacc 12.1.2
• Farmer 1.9.28
• fsharp-analyzers 0.39.2
• Fabulous 10.0.1
• SqlHydra.Query 5.0.0
• FSharp.Interop.Dynamic 6.0.0
• Facil 3.2.0
• Faqt 6.0.0
• EluciusFTW.SpectreCoff 0.57.7
• TestPrune 9.0.0
• FSharp.Azure.Cosmos 1.1.0
• FSharp.Azure.Quantum 1.4.8
• FsLiveDocs 0.7.3
• Reified.Data 0.8.2
• CommandTree 0.11.1
• fsharp-refactor 0.8.24
• Pulsar.Client 3.19.3
• SvgPath 2.0.0
• HopacPlus 1.0.2
• BlackFox.FsGetLine 0.1.0
• FsMatrix 0.1.0
• Fun.Build 1.2.0

Introducing Fable.Ripple: fine-grained reactivity for F# and Fable.A write updates the exact DOM nodes reading the signal. No virtual tree, no diff.Four focused packages for signals, DOM, forms, and routing.Try the beta: fable-hub.github.io/Fable.Ripple/#fsharp

— Maxime (@mangelmaxime.bsky.social) 2026-09-17T17:11:07.420Z

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