Sergey Tihon's Blog

Welcome to F# Weekly,

A roundup of F# content from this past week:

Microsoft News

• Visual Studio Code 1.123
• What’s Coming Next in Visual Studio: Our Microsoft Build 2026 Announcements – Visual Studio Blog
• Aspire Multi-repo Rollout at Scale with Agentic AI | Aspire Blog
• How Microsoft is migrating repositories to GitHub – Azure DevOps Blog
• Azure DevOps and GitHub: Journeying into the AI Era – Azure DevOps Blog
• Microsoft Agent Framework at BUILD 2026: Agent Harness, Hosted Agents, CodeAct, and more | Microsoft Agent Framework
• Announced at MS Build 2026: Azure Cosmos DB MCP Toolkit, Semantic Reranking, Global Secondary Indexes, and more! – Azure Cosmos DB Blog
• Work IQ: Production‑ready intelligence for every agent – Microsoft 365 Developer Blog
• Foundry IQ: Build smarter agents faster with unified knowledge and serverless retrieval | Microsoft Foundry Blog

Wolverine and Marten Just Got Better for F# Folks jeremydmiller.com/2026/06/01/w… #dotnet #fsharp #marten #wolverine

— Jeremy D. Miller (The Shade Tree Developer) (@jeremydmiller.bsky.social) 2026-06-01T19:16:59.870Z

Videos

• Translate merge function from Haskell to F# — Roel Van de Paar
• F# Calling inline function with type variables — Roel Van de Paar
• FSharp Functional Composition — Roel Van de Paar
• Microsoft Build 2026 | Satya Nadella Opening Keynote – YouTube
• On .NET Live — DuckDB & Orleans: When Fake Asynchrony Starves Your App!

Blogs

• Wolverine and Marten Just Got Better for F# Folks — Jeremy D. Miller
• Generating landscapes using Fractional Brownian Motion (FBM) — Marten Range
• Direct Light — Rendering Lights and Shadows on a Terrain in F# — Mathias Brandewinder
• Event Sourcing — The Not-So-Simple Bi-Temporal Basics — Urs Enzler

If you're following my ongoing blog post series on event sourcing and have any questions, feel free to ask here or in the post comments. Not just about event sourcing. I'm especially happy to answer questions about the F# samples.www.planetgeek.ch/tag/event-so… #EventSourcing #fsharp #dotnet

— Urs Enzler (@ursenzler.bsky.social) 2026-06-04T08:20:02.921Z

New Releases

• Fable.Compiler 5.1.0
• FSharp.Formatting.Literate 22.1.0
• WoofWare.Myriad.Plugins.Attributes 3.8.4
• WoofWare.Expect 0.8.6
• SQLProvider.* 1.5.21 — Database-specific providers released: PostgreSql, MsSql, DuckDb, SQLite, Oracle, MySql, MySqlConnector, Firebird, Odbc, MsAccess
• Bristlecone.Dendro 3.1.1 + Bristlecone.Charts.R 3.1.1
• TestPrune 4.0.2 + TestPrune.Core 4.0.2
• Numerics.NET.FSharp 10.5.0
• FsShelter.Multilang 5.2.1
• Kawa.FSharp 0.3.0
• Klip 2.0.1153
• ObservableCache 1.2.1
• NTResult 1.0.0
• Mibo.Raylib.Templates 1.0.0

New Mibo.Raylib ReleaseThis is a fast follow release, it adds support for normal maps in the 2D renderer and skeletal animation for the 3D render> dotnet add package Mibo.Raylib 1.1.0#dotnet #fsharp #gamedev #raylib

— Angel Munoz (@tunaxor.me) 2026-06-01T19:43:16.331Z

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

• 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

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