Sergey Tihon's Blog

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Angel Munoz: Mibo.Raylib 1.0.0 is Out – F# micro framework for code-first Raylib games
• Loïc Denuzière: Domain Modeling Made Functional is in the Functional Programming Humble Bundle

Fable v5.1.0 is out 🎉Several bugfixes for most targets, and a few new features as well github.com/fable-compil… #fsharp #fablecompiler

— Dag Brattli (@dbrattli.bsky.social) 2026-05-29T15:15:23.711Z

Microsoft News

• Doing More with GitHub Copilot as a .NET Developer
• Give Your .NET MAUI Android Apps a Material 3 Makeover
• A hypothetical redesign of System.Diagnostics.Process to avoid confusion over properties that are valid only when you are the one who called Start – The Old New Thing
• How Azure Chaos Studio ships with hermetic Aspire end-to-end tests | Aspire Blog
• What’s new in Microsoft Foundry | May 2026 | Microsoft Foundry Blog
• Improve your agentic developer tools by grounding in Microsoft Learn – Microsoft for Developers
• Verification-driven tooling prompts for fast-moving codebases – ISE Developer Blog
• How AI coding agents actually use your technology – Microsoft for Developers
• Visual Studio Code 1.122
• Visual Studio May Update – Plan, Review, Refine – Visual Studio Blog

Videos

• Ryan Riley: Development Process using AI – Episode 403
• .NET AI Community Standup: .NET + AI at Build 2026: What’s Coming Next? – YouTube
• .NET Data Community Standup: 8 Real-World Query Anti‑Patterns (and How to Fix Them) – YouTube

Blogs

• Urs Enzler: Event Sourcing – Why We Built Our Own Library
• How I use Rider for F# web development | by Vladimir Shchur | May, 2026 | Medium

Highlighted projects

• EHotwagner/FS-Skia-UI: Experimental F# desktop UI toolkit built on SkiaSharp and Vulkan using an Elmish Model-View-Update model
• mrLSD/riscv-fs: F# RISC-V Instruction Set formal specification
• fable-compiler/Fable: F# to JavaScript, TypeScript, Python, Rust, Erlang and Dart Compiler (Fable 5.1.0 released)

New Releases

• Pulsar.Client 3.16.0
• Fable 5.1.0
• SQLProvider 1.5.21
• FsShelter 5.2.1
• WoofWare.Myriad.Plugins 9.1.6
• Fesh 0.32.3
• Bristlecone 3.1.1
• Polars.FSharp 0.5.0
• Fable.TypedJson 0.4.0
• UnionConfig 0.4.1
• CommandTree 0.5.1
• Falco.UnionRoutes 0.3.2
• Mibo.Raylib 1.0.0
• SwaggerProvider 4.1.0
• Serde.FS 1.0.0-beta.1

Mibo.Raylib 1.0.0 is out!An F# micro framework for building code-first games > dotnet new install Mibo.Raylib.Templates> dotnet new mibo-2d -o MyGame> cd MyGame && dotnet run#dotnet #fsharp #raylib #raylibcs

— Angel Munoz (@tunaxor.me) 2026-05-31T02:20:12.696Z

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Scriptorium – A family of focused F# libraries for building and testing F#/Fable applications.
• Announcing Elmish Land 2.0 Preview
• The Impact of Automated Repository Maintenance Assistance

A new test framework joining the F# ecosystem: Scriptorium.It is designed from the ground up as a cross-target testing framework, seamlessly supporting both F# .NET and Fable compilation targets (JavaScript only at the time of writing)fable-hub.github.io/Scriptorium/#fsharp #fablecompiler

— Maxime (@mangelmaxime.bsky.social) 2026-05-18T13:45:57.590Z

Microsoft News

• Improving C# Memory Safety
• Announcing Agent Governance Toolkit MCP Extensions for .NET
• Your dev loop is full of tribal knowledge | Aspire Blog
• NuGet Package Pruning: Cleaner Dependencies and Actionable Vulnerability Reports
• Securing Azure apps with Aspire enterprise networking | Aspire Blog
• Plan Before You Build: Introducing the Plan agent in Visual Studio – Visual Studio Blog
• Visual Studio Code 1.121

Videos

• .NET Data Community Standup: 8 Real-World Query Anti‑Patterns (and How to Fix Them)
• .NET AI Community Standup: .NET + AI at Build 2026: What’s Coming Next?
• On .NET Live: How Coding Standards Supercharge .NET Quality & Performance

Blogs

• Drawing mountains: setting up Bolero · Mathias Brandewinder
• Event Sourcing — Trade-offs of Event Versioning and Migrating Approaches – Urs Enzler

Oh nice, Scott Wlaschin's Domain Modeling Made Functional is in the Functional Programming Humble Bundle! #fsharp https://www.humblebundle.com/books/ultimate-functional-programming-pragmatic-programmers-books

— Loïc Denuzière (@tarmil.mastodon.tarmil.fr.ap.brid.gy) 2026-05-19T09:49:41.000Z

Highlighted projects

• DataficationSDK/Verso — Extensible interactive notebook platform for .NET. Every built-in feature, from the C# kernel to the dashboard layout, is an extension built on the same public interfaces available to third-party authors. Runs in VS Code and the browser.
• bartul/imperium — Strategy board game engine for Imperial (Mac Gerdts), exploring F# DDD and CQRS patterns
• fsprojects/FSharp.Control.R3 — Extensions and wrappers for using R3 reactive programming with F#
• ScottArbeit/Grace — Grace Version Control System built in F# with Orleans and cloud-native design

With the latest Notepad++ there is a Treesitter v1.1 plugin that supports #fsharp and many other languages

— Tuomas Hietanen (@thoriumi.bsky.social) 2026-05-20T21:10:39.213Z

New Releases

• FSharp.Compiler.Service 43.12.204
• WebSharper 10.1.5.674
• Feliz 3.3.3
• Feliz.UseElmish 5.0.0
• Akka.FSharp 1.5.68
• Akka.Persistence.FSharp 1.5.68
• FSharp.Formatting 22.0.1
• RProvider 3.0.0
• SageFs 0.6.273
• FSharp.Idioms 1.5.10
• FParsec-Pipes 1.3.0
• TickSpec 2.0.5
• Prime 11.5.1
• FSharp.HotChocolate 1.0.2
• DeviantArtFs 12.0.0
• Fesh 0.32.2
• linq2db.FSharp 6.3.0
• Farse 0.12.2
• XParsec 1.0.0
• FsLangMcp 0.9.2
• Hedgehog.Stateful 1.1.1

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• [System.Text.Json] now understands F# discriminated unions out of the box
• SwaggerProvider v4.0.0

"[System.Text.Json] now understands F# discriminated unions out of the box" github.com/dotnet/core/…

— Jon Sagara (@jonsagara.com) 2026-05-13T15:32:43.689Z

Microsoft News

• .NET 11 Preview 4 is now available!
• .NET and .NET Framework May 2026 servicing releases updates
• Process API Improvements in .NET 11
• .NET MAUI Moves to CoreCLR in .NET 11
• From beta to stable: Announcing the Azure SDK for Rust 🎉🦀 – Azure SDK Blog
• WebAssembly Data Processing at the Edge with Azure IoT Operations – ISE Developer Blog
• Visual Studio Code 1.120 with Agents window
• Agent Skills in Visual Studio: Teach Copilot How Your Team Works – Visual Studio Blog
• Introducing WinUI agent plugin for GitHub Copilot and Claude Code – #ifdef Windows

Videos

• Yapping about GUIs, F# and Lisp
• Blazor Community Standup: E2E Component Testing for Blazor

Blogs

• ragingHungryPanda: Shared Postgres Test Container with Expecto in F#
• brandewinder: Computing lighting and shadows of mountains from above in F#
• Event Sourcing: compensation – the simple way out when things go wrong – planetgeek.ch

Highlighted projects

• Azizs2162/fyper — Build type-safe Cypher queries in F# with plain records, query expressions, and automatic parameterization
• agentruntimecontrolprotocol/fsharp-sdk — F# / .NET reference SDK for ARCP (Agent Runtime Control Protocol) with durable execution and human-in-the-loop support
• MagnusOpera/FScript — Functional language interpreter inspired by F#/ML, with type inference and LSP support
• goswinr/Euclid — A 2D and 3D geometry library for F# (and JavaScript via Fable)
• elekvk/FocusQuest — Gamified productivity web app built with F#, Bolero and ASP.NET Core

New Releases

• FSharp.Data 8.1.14
• FSharp.Compiler.Service 43.12.204
• WebSharper 10.1.4.673
• Feliz 3.3.2
• Feliz.UseElmish 5.0.0
• Feliz.CompilerPlugins 3.2.0
• SwaggerProvider 4.0.0
• SageFs 0.6.273
• FSharp.Formatting 22.0.1
• fsdocs-tool 22.0.1
• RProvider 3.0.0
• FSharp.Idioms 1.5.10

SwaggerProvider v4.0.0 is live! 🎉 #fsharpOverhauled for speed, cleaner code gen, and better developer ergonomics.⚡ Blazing fast zero-allocation hot paths📅 Native DateOnly & TimeOnly support📝 Richer IDE docs via inline XmlDoc⚠️ Breaking: Legacy v2 compiler removedgithub.com/fsprojects/S…

— Sergey Tihon 🦔🦀 (@sergeytihon.com) 2026-05-16T18:26:10.183Z

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

Microsoft News

• Copilot Studio gets faster with .NET 10 on WebAssembly
• Durable Workflows in the Microsoft Agent Framework
• Microsoft Agent Framework – Building Blocks for AI Part 3
• What’s New in Aspire 13.3 | Aspire Blog
• A Tour of Handoff Orchestration Pattern | Microsoft Agent Framework
• Visual Studio Code 1.119

Videos

• Yapping about GUIs, F# and Lisp — Matt R
• .NET MAUI Community Standup: Rust, SkiaSharp Everywhere, AI/ML Live Processing — .NET
• ASP.NET Community Standup: Simplifying Entra ID authentication with AI — .NET
• On .NET Live: Shaving the outbox pattern yak — .NET

Blogs

• ragingHungryPanda: Navigating and Learning Data Access in FSharp
• Understanding Compilers Through an Algebraic Expression Compiler | Jonas Lara
• AI + F#: Faster Development Without Losing Reliability – Ada Beat

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

— (@halcwb.bsky.social) 2026-05-04T19:07:14.386Z

Highlighted projects

• Neftedollar/FsMcp — Idiomatic F# toolkit for building Model Context Protocol (MCP) servers and clients with type safety and computation expressions
• WillEhrendreich/SageFs — Sage Mode for F# development — REPL with solution loading, Live Testing, Hot Reload, and MCP server support
• fs-fio/fio — A type-safe, purely functional effect system for asynchronous and concurrent F#
• Neftedollar/ll-lang — Write once, compile to F#, TypeScript, Python, Java, and C# — LLM-optimized syntax with self-hosting
• jonas1ara/Algebraic-Tiny-Compiler — Understanding compilers through algebra

New Releases

• FSharp.Data 8.1.13
• NBomber 6.4.0
• Pulsar.Client 3.15.2
• Akka.FSharp 1.5.67
• Akka.Persistence.FSharp 1.5.67
• SageFs 0.6.270
• Equinox.MessageDb 4.1.3
• Propulsion.MessageDb 3.0.1
• EluciusFTW.SpectreCoff 0.54.7
• FSharp.TypeProviders.Templates 8.10.0
• FsMcp.Core 1.1.1
• Fable.TypedJson 0.3.0
• FunStripe.Core 2.0.6
• YamlFrontMatter 0.10.8
• CommandTree 0.5.0
• UnionConfig 0.2.0
• FSharp.Windows.Dsl 0.3.0
• Expecto 11.0.0-alpha9

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

— (@halcwb.bsky.social) 2026-05-07T09:06:48.150Z

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

Microsoft News

• Welcome to SkiaSharp 4.0 Preview 1
• Building an AI-Powered Conference App with .NET’s Composable AI Stack
• Governing MCP tool calls in .NET with the Agent Governance Toolkit
• Combining API versioning with OpenAPI in .NET 10 applications
• High-Performance Distributed Caching with .NET and Postgres on Azure
• VSTest is Removing its Newtonsoft.Json Dependency
• PowerToys 0.99 is here: new monitor controls, easier window management, and Dock upgrades
• Visual Studio April Update – Cloud Agent Integration – Visual Studio Blog
• Visual Studio Code 1.118

Videos

• Functional programming in F# — Fad or Fabulous | Ken Bonny
• .NET MAUI Engineering Team Live Stream: AI-Powered .NET MAUI Development with MauiDevFlow
• Blazor Community Standup: Blazor virtualization gets flexible
• On .NET Live — Make your first NuGet library with .NET 10 and AI

Blogs

• Nick Kossolapov: I built a Game Boy emulator in F#
• Urs Enzler: Event Sourcing — Read Models to the Rescue
• Roman Deneau: What if your pattern matching could call functions?

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

— Fer (@lferc.bsky.social) 2026-05-01T08:18:27.829Z

Highlighted projects

• nickkossolapov/fame-boy — A Game Boy emulator written entirely in F#
• fable-compiler/Fable.Beam — F# to Erlang/BEAM transpiler, opening the door to F# on the Erlang ecosystem
• vykrum/Hywe — Active design sandbox for weaving spatial topology and flow-based hierarchies via design computation, built with F# and WebAssembly
• Savelenko/FSharp.Control.Fold — Represent folding of data structures and streams as composable values via F# applicative computation expressions

New Releases

• FSharp.Data 8.1.11
• Fable.Core 5.0.0
• WebSharper 10.1.1.670
• dotnet-repl 0.3.259
• Equinox.EventStore 4.1.3
• Oxpecker 2.0.1
• Oxpecker.ViewEngine 2.0.1
• Oxpecker.OpenApi 2.1.2
• Thoth.Json.Core 0.9.0
• Fable.Python 5.1.0
• XstarS.GuidModule 2.14.0
• FSharp.Control.Fold 2.0.0
• Conjecture.FSharp 0.27.1
• Giraffe.ViewEngine.Style 0.2.0
• Farse 0.11.0
• Parquet.Net 6.0.0-pre.8
• NBomber 6.4.0-beta.3
• DSharpPlus 5.0.0-nightly-02585
• Expecto 11.0.0-alpha9
• Terminal.Gui 2.0.2-develop.16
• SwaggerProvider 4.0.0-beta03
• Orleans.FSharp 2.0.0-alpha.1
• Agent.NET v1.0.0-rc.8

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

— Jordan Marr (@jordanmarr.bsky.social) 2026-04-27T21:48:26.050Z

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

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.

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• .NET 11 Preview 3 is now available!
• TypeFighter
• Replace Queue with mutable doubly-linked EventList by nojaf · Pull Request #3331 · fsprojects/fantomas

Microsoft News

• .NET and .NET Framework April 2026 servicing releases updates
• Free Your Terminal with Detached Mode in Aspire 13.2 | Aspire Blog
• New Aspire database integrations | Aspire Blog
• Agent Skills in .NET: Three Ways to Author, One Provider to Run Them | Microsoft Agent Framework
• Azure MCP tools now ship built into Visual Studio 2022 — no extension required – Visual Studio Blog
• Stop Hunting Bugs: Meet the New Visual Studio Debugger Agent Workflow – Visual Studio Blog
• From AI to .NET: 20 VS Live! Las Vegas Sessions You Can Watch Now – Visual Studio Blog
• Visual Studio Code 1.116

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

— Sergey Tihon 🦔🦀 (@sergeytihon.com) 2026-04-16T17:04:11.473Z

Videos

• Functional programming in F# Fad or Fabulous | Ken Bonny
• Blazor Community Standup: Blazor validation in .NET 11

Blogs

• Interview with Jack Fox about porting variant of F#/OCaml/F* to Nock (Urbit’s minimalist instruction set architecture)
• Urs Enzler: Event Sourcing — Simple Is Often Enough
• What if your compiler could enforce your architecture rules? | LinkedIn
• Samir Parikh: Options in F#

Highlighted projects

• pblasucci/ananoid — Ananoid provides nano identifiers, an alternative to UUIDs.
• Neftedollar/fyper — Type-safe Cypher query builder for F# with computation expressions for Neo4j and Apache AGE, zero dependencies
• TheFellow/fkyeah — F# pipeline engine for multi-stage AI workflows and LLM orchestration
• Neftedollar/orleans-fsharp — Idiomatic F# API for Microsoft Orleans using computation expressions, with full Orleans 10.0.1 parity and 800+ tests
• venikman/ACP-inspector — Debug and validate Agent Client Protocol (ACP) traffic for AI coding agents

New Releases

• tree-sitter-fsharp 0.3.0
• FSharp.Data 8.1.8
• FSharp.TypeProviders.Templates 8.6.0
• FSharp.Control.AsyncSeq 4.14.0
• FSharp.Compiler.Service 43.12.202
• Pulsar.Client 3.15.1
• Fable.Remoting.Client 8.0.0
• Fable.Remoting.Server 6.1.0
• Feliz 3.3.0
• FSharp.Control.TaskSeq 1.1.1
• Farmer 1.9.27
• Akkling 0.18.1
• Fantomas.Client 0.11.0
• Fss-lib.Core 3.0.0
• SageFs 0.6.242
• Fidelity.CloudEdge.Management 0.2.0
• StarFederation.Datastar.FSharp 1.3.0

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

— Florian Verdonck (@nojaf.com) 2026-04-14T12:53:31.821Z

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

Microsoft News

• Your Migration’s Source of Truth: The Modernization Assessment – .NET Blog
• ASP.NET Core 2.3 end of support announcement – .NET Blog
• Running Multiple Instances of an Aspire AppHost Without Port Conflicts | Aspire Blog
• MCP Apps now available in Copilot chat – Microsoft 365 Developer Blog
• Visual Studio Code 1.115

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

— Jon Sagara (@jonsagara.com) 2026-04-07T15:00:35.292Z

Videos

• “Functional Programming Through Construction” By Cameron Presley
• Andrey Chebukin – Azure Cosmos DB – A Deep Dive with Examples in F#
• VS Code Live – Modernizing Legacy .NET applications with GitHub Copilot Modernization in VS Code
• .NET AI Community Standup: Upgrading GenAINET to MAF v1 with SQUAD
• Blazor Community Standup | Blazor integration with Aspire
• On .NET Live – AI offers benefits, but at what cost?

Blogs

• Attempting to auto-tune RANSAC · Mathias Brandewinder blog
• Samir Parikh: Introduction to discriminated unions and pattern matching in F#
• Hidden updates in Ink by Michael Newton
• Fediverss by Michael Newton

bonfire.mavnn.eu/pub/objects…So this is very much a work in progress (see me having to quote the post to add the hashtags…), but meet `fediverss` – a simple F# program that puts your static blog rss in the fediverse. #activitypub #fsharp #blog

— Michael Newton (@mavnn.bonfire.mavnn.eu.ap.brid.gy) 2026-04-10T12:19:17.506Z

Highlighted projects

• Neftedollar/FsMcp — Idiomatic F# toolkit for building Model Context Protocol (MCP) servers and clients with type safety and computation expressions
• MagnusOpera/FScript — Functional language interpreter inspired by F#/ML, with type inference and LSP support
• michaelglass/Falco.UnionRoutes — Type-safe routing with discriminated unions for the Falco web framework
• Neftedollar/ll-lang — Statically typed functional language designed for LLM code generation with token-efficient syntax
• jmeyerhoefer/Testify — F# testing library with a deeply embedded DSL for quotation-based assertions and property-style checks

New Releases

• FSharp.Data 8.1.7
• Pulsar.Client 3.15.0
• SQLProvider 1.5.19
• Akka.FSharp 1.5.65
• Akkling 0.18.0
• Akkling.Persistence 0.18.0
• Akkling.Streams 0.18.0
• Akka.Persistence.FSharp 1.5.65
• SwaggerProvider 3.2.0
• fsdocs-tool 22.0.0
• FarNet.FSharpFar 5.4.0
• FSharp.Idioms 1.5.9
• Fli 1.1000.0
• FsShelter 5.1.0
• telplin 0.11.0
• FSharp.TypeProviders.Templates 8.5.0
• FarNet.FSharp.PowerShell 3.2.0
• Bristlecone 3.1.0
• Frank 7.3.1
• FSharp.Azure.Quantum 1.3.12

Grab the #pxlclock VS Code extension ("PXL Clock), code your own pixogram in #csharp, and ping me here: I'll record it on the real hardware and post the video.Who makes the coolest one?VS Code: marketplace.visualstudio.com/items?itemName=pxlclock.pxl-clock#pxlclock #csharp #fsharp

— SchlenkR (@schlenkr.bsky.social) 2026-04-05T17:33:08.495Z

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

If you want to help keep F# Weekly going, click here to jazz me with Coffee!

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• Serde.FS alpha.9 — Compile-time RPC for F# with no reflection, no controllers
• Florian Verdonck: Fantomas — exploring new approach to trivia handling

🚀 Serde.FS alpha.9 — Deterministic RPC for F#No reflection. No controllers.Just compile‑time RPC clients + routing.Includes:• [<RpcApi>]• ASP.NET RPC server• Deterministic JSON backend• Shared → Server → Client examplegithub.com/serde-fs/Ser… #fsharp #rpc #aot #serde #dotnet

— Jordan Marr (@jordanmarr.bsky.social) 2026-03-23T00:23:57.049Z

Microsoft News

• Explore union types in C# 15 – .NET Blog
• Aspire 13.2: Dashboard Gets Smarter Export and Telemetry | Aspire Blog
• Aspire Docs in Your Terminal (and Your AI’s Brain) | Aspire Blog
• Microsoft Agent Framework Version 1.0 | Microsoft Agent Framework
• Visual Studio March Update – Build Your Own Custom Agents – Visual Studio Blog
• Bookmark Studio: evolving bookmarks in Visual Studio – Visual Studio Blog
• Visual Studio Code 1.114

Videos

• .NET MAUI Community Standup | Introducing maui-labs – YouTube
• On .NET Live – Imposter: A Mocking Library – YouTube

Blogs

• Functional Languages and the Future of Programming (Part 1) – Linux Professional Institute (LPI)
• Samir Parikh: A Better Way to Represent a Deck of Cards in F#

Highlighted projects

• ingted/FSharp.MCP.DevKit — Experimental prototype of an F# development toolkit delivered via the Model Context Protocol (MCP).
• WillEhrendreich/SageFs — Sage Mode for F# development: REPL with solution loading, Live Testing, Hot Reload, and MCP server support
• laurentlb/shader-minifier — Minify and obfuscate GLSL or HLSL shader code; written in F#, used widely in the demoscene
• DataficationSDK/Verso — Extensible interactive notebook platform for .NET with F# support, runs in VS Code and the browser
• Neftedollar/orleans-fsharp — Idiomatic F# computation expressions for Microsoft Orleans — full Orleans 10.0.1 parity

New Releases

• Serde.FS v1.0.0-alpha.9
• FSharp.Data 8.1.5
• FSharp.Control.AsyncSeq 4.12.0
• Pulsar.Client 2.22.0
• FSharp.Formatting 22.0.0
• SQLProvider 1.5.18
• Akka.FSharp 1.5.64
• Dapper.FSharp 4.10.0
• SqlHydra.Query 3.6.0
• FsCodec.SystemTextJson 3.1.2
• Avalonia.FuncUI v1.5.2
• FSharp.Stats 0.6.0
• FsShelter 5.0.0
• Fss-lib.Core 3.0.0
• FSharp.TypeProviders.Templates 8.4.0
• FsMcp 1.0.1
• Orleans.FSharp 1.0.0
• shader-minifier 1.6.0
• Verso v1.0.12
• fantomas 8.0.0-alpha-009
• WebSharper 10.1.0.667

#neovim version 0.12.0 is out! Almost exactly a year of hard work since 0.11.0.Huge thanks to everyone who worked on it, as well as to all Neovim users!Release: github.com/neovim/neovi…News: github.com/neovim/neovi…Changelog: github.com/neovim/neovi…Here are top 10 most liked features:

— Neovim (@neovim.io) 2026-03-29T17:28:32.649Z

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

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