F# Online
fsharponline.bsky.social
F# Online
@fsharponline.bsky.social
Supporting the worldwide #fsharp community via online channels

https://hachyderm.io/@fsharponline
https://x.com/fsharponline
Pinned
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
Reposted by F# Online
Trend is to generate a compiler using LLM... So here is my contribution: FScript, an embeddable #fsharp lang inspired interpreter. Entirely developed with Codex, no shame 😃
Execution is sandboxed and extensible, also support structural record annotation (think Typescript).
github.com/MagnusOpera/...
GitHub - MagnusOpera/FScript: Functional language interpreter - F#/ML inspired
Functional language interpreter - F#/ML inspired. Contribute to MagnusOpera/FScript development by creating an account on GitHub.
github.com
February 7, 2026 at 6:37 PM
Reposted by F# Online
Reposted by F# Online
Src: latest Fireship 🔥 vid on .NET, this is why you can mix and match #csharp and #fsharp code in the same solution, referencing one from the other with full intellisense and cross language debug support in Vs,VsCode,Rider ! Try F# in 2026 for smt fun like a small library and call it from C# ☺️✨
January 17, 2026 at 1:06 PM
Reposted by F# Online
I told claude code to NEVER EVER touch my #fsharp code base files, i.e. anything *.fs, but instead do all implementations in script files, so I can first check what is going on. And I am so glad I did this.
January 17, 2026 at 7:53 PM
Reposted by F# Online
It's been a while I shall have completed FSharp.MongoDB - but literally had no time to spend on fixing a stack overflow.
Now it is feature complete and fully supports NRT 🎉

Enjoy F# + MongoDB ! #fsharp #mongodb

github.com/fsprojects/F...
GitHub - fsprojects/FSharp.MongoDB: Add support for F# types to .net MongoDB.Driver
Add support for F# types to .net MongoDB.Driver. Contribute to fsprojects/FSharp.MongoDB development by creating an account on GitHub.
github.com
January 18, 2026 at 1:15 PM
Reposted by F# Online
🚀 #NBomber v6.2.0 is out!!!

The team has focused on improving HTML reporting and cluster usability, as well as adding powerful observability support.

nbomber.com/blog/2026/01...

#dotnet #fsharp #csharp #nbomber #loadtesting
NBomber v6.2.0 | NBomber
In the NBomber v6.2.0 release, we focused primarily on improvements to cluster mode, and we also introduced several useful enhancements to the HTML Report.
nbomber.com
January 20, 2026 at 7:19 PM
Reposted by F# Online
Definitely. Would people be interested in coming to Bergen, Norway? We could combine combine with hiking trips up the mountains.
January 26, 2026 at 8:09 AM
Reposted by F# Online
I wonder... would there be any interest in some F# event / (un)conference in 2026?
I always wanted to do something similar to F# Creators Workshop (which @dsyme.bsky.social organised years ago in Cambridge) or Elm Camp (which has been for last couple of years)

#fsharp
January 21, 2026 at 6:53 PM
Reposted by F# Online
Reposted by F# Online
I did a new thing with #fsharp on backend and pinch🤏 of #typescript on frontend. It's called Triple19, running on www.triple19.com and it's all about my new-ish hobby - Darts. It's quite complex and I'll do tech talk about it one day, but now if you would give it a shot, would ya? #darts
Triple19 — AI-Powered Darts Platform
Triple19 is the AI-powered online darts platform. Voice scoring, AI bot opponents, detailed statistics, and multiplayer — everything you need to play, compete, and improve.
www.triple19.com
February 2, 2026 at 3:18 PM
Reposted by F# Online
SqlHydra - v3.4 is out today. It is a rollup of the last two releases. Lots of nice, new features and some deprecated ones to help transition into an upcoming v4.0. #fsharp

github.com/JordanMarr/S...
Release SqlHydra v3.3 + v3.4 · JordanMarr/SqlHydra
An ergonomic release that modernizes how query contexts are created, improves left‑join projections, and introduces a more expressive join API. Fully backward‑compatible with 3.2, and forward-looki...
github.com
February 3, 2026 at 2:46 PM
Reposted by F# Online
Fidelity framework and the Firefly compiler will move #fsharp to S-tier (by those measures)
February 6, 2026 at 1:17 PM
Reposted by F# Online
⚡️❄️This is such a great showcase for #fsharp! 🔌
January 31, 2026 at 12:08 AM
Reposted by F# Online
New JDeck Release,
This release adds a few missing data types for encoders, decoders.

#dotnet #fsharp #json #serialization
January 31, 2026 at 9:38 PM
Reposted by F# Online
Reposted by F# Online
An ode to "slowly" handcrafted code
www.planetgeek.ch/2026/02/02/a...

When I open my social media feeds, it's obvious: the age of writing code with our fingers is ending. LLMs can write code much faster.

But was it ever about the speed of code creation? I think not.

#LLMs #agents #fsharp
An ode to “Slowly” HANDCRAFTED code
When I open my social media feeds, it is obvious: the age of writing code with our fingers is ending. LLMs and agents can write code much faster. But was it ever about the speed of source code…
www.planetgeek.ch
February 3, 2026 at 9:20 AM
Reposted by F# Online
C# and F# Interop (2026 edition)
How to easily start with F# in your existing C# codebase.
www.planetgeek.ch/2026/01/06/c...

#dotnet #csharp #fsharp #Interop
C# – F# Interop (2026 edition)
One of the great features of .NET is that you can mix its programming languages (C#, F#, VB.NET) in a single solution and that assemblies written in one language can call assemblies written in other…
www.planetgeek.ch
January 6, 2026 at 1:01 PM
Reposted by F# Online
So... Progress update with Mibo
The mini framework allows you to build 2D and 3D games

Still early days but here's a quick and dirty platformer
and trying to validate the prototype ideas, feedback is welcome
#monogame #fsharp #dotnet #gamedev
January 8, 2026 at 6:06 PM
Reposted by F# Online
Currently watching "Why Rust isn't everywhere (yet)". youtu.be/nOSxuaDgl3s?...
A great interview.

And as an F# developer, I see many parallels.

And I will stick with F# - fits our needs better regarding application development.

#fsharp #rust
Rust 2025: $400K Salaries, Go, AI & Why It's Not Everywhere (Yet) — Jon Gjengset Explains
What’s next for Rust in 2025? In this in-depth interview, Jon Gjengset (Rust educator, MIT PhD, and author of Rust for Rustaceans) discusses how Rust salaries are reaching $400,000, how AI is…
youtu.be
January 9, 2026 at 2:08 PM
Reposted by F# Online
And systems programming is coming to #fsharp speakez.tech/blog/fsharp-...
F# on Metal Revisited
From Stack-Only to Graduated Memory: A Year Of Fidelity Framework Evolution
speakez.tech
January 9, 2026 at 2:13 PM