F# Online

F# Online is now moved to Bluesky (as well as Mastodon, YouTube), and will no longer amplify content posted on X. Here's an F# starter pack on Bluesky go.bsky.app/SZQgDn8

Wrote a blog post about Options in #fsharp blog.samirparikh.com/2026/04/opti...

Just released SwaggerProvider 4.0.0-beta01 that wrap nullable strings in Option<string>. Try it out and share your feedback! fsprojects.github.io/SwaggerProvi... #fsharp

⚡️ F# Weekly #16, 2026 🏷️ #devdigest #dotnet #net #fp #fsharp https://devdigest.today/goto/6230

✨Fable v5 ✨ Such great news today ❤️ In addition to JS/TS, Rust, and Dart, the Python target has been significantly improved, and there is also the exciting new BEAM target added to the list. Write once run everywhere 🥰 #fsharp #fablecompiler

Just had one of those epiphany moments in #zig as I looked at a problem and realised 'hang on a minute - that thing I read in the docs and didn't fully understand about arena allocators was talking about _this_ , wasn't it?' The ability to swap out which allocators I'm using is giving me a […]

If there are serious issues with Ionide then I probably can fund solving those issues. We are going to invest in #fsharp as the main language to create meaningful clinical decision support software. Finally, this is long over due!

Agent.NET rc.8 is released! It adds a couple nice-to-have features that clean up the code nicely, and updates to the latest stable MAF versions. github.com/JordanMarr/A... #fsharp

The third post in my event sourcing series covers read models and their benefits and drawbacks: www.planetgeek.ch/2026/04/28/e... It also includes a deep dive into an example. #dotnet #fsharp #EventSourcing

Most languages let you pattern-match on what data IS. #FSharp lets you pattern-match on what data MEANS. Active Patterns reshape data so you can match on business concepts instead of raw structure. And they compose. 🔗 rdeneau.gitbook.io/safe-clean-a... #DotNet #PatternMatching #FuncProg

My friend Nick wrote a Game Boy Emulator with #fsharp and here is his journey nickkossolapov.github.io/fame-boy/bui...

There you go: #fsharp adabeat.com/fp/ai-f-fast...

Also, the problem as described in this video is far less using #fsharp. Note that you really need to pay attention to your domain model, but once that has been fleshed out, AI can pretty much infer the rest. youtu.be/cPoEFM1AKE4?...

This is what is happening right now. Claude uses the fsi-mcp to slowly and step by step implement a plan in #fsharp. AI + #sharp + #fsi-mcp

👾I built a Game Boy emulator in F# nickkossolapov.github.io/fame-boy/bui... #gbdev #fsharp #emulation #retrogaming

F# Weekly #19, 2026 - Understanding Compilers Through an Algebraic Expression Compiler #fsharp sergeytihon.com/2026/05/09/f...

🎉 Deedle 4.0.1 is out! The F# data frame library just got a massive update - new packages, new operations, better stats, performance wins, and many long-standing bugs squashed. A huge amount of community-originated requests in one release. Full notes 👇 github.com/fslaborg/Dee... #fsharp #dotnet

I am reading and will try to apply this very interesting #fsharp architecture: rdeneau.gitbook.io/safe-clean-a...

F# Weekly #13, 2026 - Deedle 4.0 is out! #fsharp sergeytihon.com/2026/03/29/f...

⚡️ F# Weekly #13, 2026 🏷️ #devdigest #dotnet #net #microsoft #ide #vscode #visualstudio #fp #fsharp #git #github https://devdigest.today/goto/5956

F# Weekly #14, 2026 - Serde.FS Brings Compile-Time RPC to F# #fsharp sergeytihon.com/2026/04/05/f...

I love that FSharp.Data is being worked on again #fsharp github.com/fsprojects/F...

In the #TypeScript world, #TanStackQuery has set the standard: no async in components, declarative loading states, and clean error handling. The #FSharp #SAFEStack reaches the same ergonomics — but the compiler enforces correctness across the entire stack. No URL typos. No serialization mismatches.

F# Weekly #15, 2026 - Akkling, FSharp.Data and RANSAC auto-tune #fsharp sergeytihon.com/2026/04/11/f...

Great getting started with #vscode and #fsharp in #dotnet now updated for FSI and scripting for beginners 💕💚🙌 learn.microsoft.com/en-us/dotnet...

The start of my new blog post series about Event Sourcing. The first post starts with a simple projection-only approach: www.planetgeek.ch/2026/04/14/e... You'll see why we don't use event numbers for ordering, but timestamps, and why this is our default approach. #EventSourcing #dotnet #fsharp

We will remove the Fantomas Discord in favour of a channel on the #fsharp one: discord.com/channels/196... See you there!

What if your compiler enforced your architecture rules? Why choose between Clean, Hexagonal, Vertical Slices, Screaming? Safe Clean Architecture combines all 5 & turns #fsharp file declaration order into compile-enforced layer boundaries #dotnet #CleanArchitecture www.linkedin.com/pulse/what-y...

Evaluating tech stack for a big upcoming project and there's a clear dividing line on age between the young who want to use React, and the old who are all going 'fuck no' (We're going with HTMX + Giraffe over NextJS). #fsharp

F# Weekly #16, 2026 - .NET 11 Preview 3 & SwaggerProvider 4.0 beta #fsharp sergeytihon.com/2026/04/19/f...

If you maintain open source projects, these two tools have been game-changers for me recently: - EasyBuild.ShipIt by @mangelmaxime.bsky.social - Repo Assist by @dsyme.bsky.social - github.com/easybuild-or... - github.com/githubnext/a... #fsharp #csharp #dotnet

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

EasyBuild.ShipIt 2.2.0 has been released. This version add a new `--dry-run` flag allowing you to preview the changes that will be made. It is pretty handy when setting up a new repo to check that everything is working correctly. #fsharp

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

F# Weekly #17, 2026 - Fable 5.0 #fsharp sergeytihon.com/2026/04/25/f...

F# Weekly #18, 2026 - Game Boy Emulator in F# #fsharp sergeytihon.com/2026/05/03/f...

Next week I will present the new work on Fable Beam at Oslo F# Meetup 💫 #fsharp #fablecompiler

First Repo Assisted release of SwaggerProvider is out #fsharp github.com/fsprojects/S... 🎉🤖

F# Weekly #8, 2026 - Boosting F# Libraries with Automated Agentic AI #fsharp sergeytihon.com/2026/02/22/f...

SqlHydra v3.5 released with new query functionality for SQL Server. #fsharp github.com/JordanMarr/S...