Sergey Tihon's Blog

Welcome to F# Weekly,

A roundup of F# content from this past week:

News

• WebSharper 10.0
• Aspire 13.1 – Our holiday gift to you | Aspire Blog
• Microsoft.Testing.Platform Now Fully Supported in Azure DevOps – .NET Blog
• How to Build iOS Widgets with .NET MAUI – .NET Blog
• Build declarative agents for Microsoft 365 Copilot with MCP – Microsoft 365 Developer Blog
• What’s new in Microsoft Foundry | October and November 2025 | Microsoft Foundry Blog
• Introducing the Copilot Studio + Azure AI Search Solution – ISE Developer Blog

We have decided to put the Fidelity Framework elements in their own GitHub org. Everything is still in fairly early days. We don't expect many community contributions at this point but we wanted to be sure that folks will see the work progressing in the open. github.com/FidelityFram… #fsharp

— SpeakEZ.tech (@speakeztech.bsky.social) 2025-12-19T23:50:07.930Z

Videos

• ASP.NET Community Standup – ASP.NET Core planning kickoff for .NET 11
• On .NET Live | Showcasing an educational platform for quantum computing with custom Copilot
• HTMX and ASP.NET Core – I don’t know how to React – Maarten Balliauw – Azure Dev Summit 2025

Blogs & FsAdvent

• Taming the Brown Field with F#: Interactive Refactoring for Mature Codebases – halcwb
• F# and PowerShell >🎄? – jkone27
• Exploring MonoGame with F# – Angel Munoz
• Parsing and Lexing in F# – Owais
• F#, Microsoft Agent Framework, MCP and Bitcoin – F#, Microsoft Agent Framework, MCP and Bitcoin
• A Brief Introduction to Quantum Computing for F# Developers – Tuomas Hietanen

Highlighted projects

• ingted/FsPickler10 – .net 10 version of FsFickler with removedFormatter-based serialization.
• Thorium/FSharp.Azure.Quantum: Make Quantum computing available for enterprise .NET developers (and AI) via Azure.Quantum
• vbfox/MasterOfFoo: An F# library to allow using printf style strings in more places.
• CSBiology/YAMLicious – small YAML reader/writer inspired by Thoth.Json syntax!
• dburriss/fsagent: A small DSL and library for generating custom agent files for popular agent tools
• nightroman/FarNet.FSharp.Unquote: This package provides F# Unquote for FarNet.FSharpFar

New Releases

• FS.FluentUI 3.0.0
• FSharp.Azure.Quantum 1.3.3
• BlackFox.MasterOfFoo 2.1.1
• FS.FluentUI 3.0.0
• Hedgehog 2.0.1
• SqlHydra.Cli 3.1.1
• FS.FluentUI.Charts 1.0.2
• Fesh 0.31.0
• FsiX.Cli 0.1.2
• Feliz.Tailwind 4.0.2
• FsAgent 0.1.0
• FCQRS.Model 5.0.2
• FarNet.FSharp.Unquote 3.1.0
• linq2db.FSharp 6.1.0
• FSharp.AWS.DynamoDB 0.13.0-beta
• Fabulous.AST 2.0.0-pre05
• Fable 5.0.0-alpha.21
• fantomas 8.0.0-alpha-002

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 10 Networking Improvements – .NET Blog
• Microsoft Learn MCP Server Elevates Development – .NET Blog
• Implementing Cross-Platform In-App Billing in .NET MAUI Applications – .NET Blog
• Making Windows Terminal awesome with GitHub Copilot CLI – Microsoft for Developers
• Join us for AI Dev Days – December 10-11 – Microsoft for Developers
• Aspire Integrations, Batteries Included | Aspire Blog
• Streamlining your Git workflow with Visual Studio 2026 – Visual Studio Blog

🚀 Excited to announce SharpIDE – A Modern, Cross-Platform IDE for .NET!I'm thrilled to share my latest open-source project, just in time for .NET 10: SharpIDE, a brand new IDE for .NET, built with .NET and Godot! 🎉🔗 Check it out on GitHub: github.com/MattParkerDe……

— Matt Parker (@mattparker.dev) 2025-11-11T23:24:13.521Z

Videos

• Type Inference: Write Less Code, Catch More Bugs.
• Excel: The World’s Most Successful Functional Programming Platform by Houston Haynes
• 🎄 Advent of code 2025 in F# – day 07
• 🎄 Advent of code 2025 in F# – day 08
• TinyExcel 7.1 – Technical dimensions of spreadsheets
• TinyExcel 7.2 – Architecture and F# events
• TinyExcel 7.3 – Code structure and step-by-step guide
• ASP.NET Community Standup – Build agentic UI with AG-UI and Blazor
• On .NET Live – On .NET Live | Patterns in Messaging Systems
• .NET Day on Agentic Modernization

Let's build a Programming Language – together!The goal? Combine the developer experience of Python with the safety of TypeScript.In Episode 0: Syntax + Type Inference📺 http://www.youtube.com/watch?v=fSRT…#TypeInference #TypeScript #CSharp #FSharp #Rust #Haskell

— SchlenkR (@schlenkr.bsky.social) 2025-12-13T08:58:15.904Z

Blogs & FsAdvent

• Implementing my own bookmark manager – Jozsef Uri
• F# in Production: What I Know After Four Years – Ben Copeland
• Comprehensive Guide to SRTP Gymnastics – Millennium
• I like my F# code type annotation-free – Urs Enzler
• Adding Goal Seek to Quipu (and helping Santa with it!) – Mathias Brandewinder
• Tagless Final in F# – John Azariah
  • Tagless Final in F# – Part 1: Froggy Tree House
  • Tagless Final in F# – Part 2: Maps, Branches, and Choices
  • Tagless Final in F# – Part 3: Goals, Threats, and Getting Stuck
  • Tagless Final in F# – Part 3: Goals, Threats, and Getting Stuck
  • Tagless Final in F# – Part 5: Verifying the Elevator
  • Tagless Final in F# – Part 6: The Power of Tagless-Final: Code as Model
• Making of A Programming Language – Making of A Programming Language
• Baker: A Key Ingredient to Firefly | SpeakEZ Technologies
• Show Notes: The World’s Most Successful FP Platform | SpeakEZ Technologies

F# vNext

• mutable on any binding · Issue #1457 · fsharp/fslang-suggestions
• [WIP]: MethodImplOption.Async support by TheAngryByrd · Pull Request #19065 · dotnet/fsharp

Highlighted projects

• speakeztech/Firefly: A compiler that brings F#’s elegance and precision to systems programming through MLIR and various backends
• cariandrum22/Xanthos: Type-safe F# wrapper for the JRA-VAN JV-Link COM API, providing functional access to Japanese horse racing data.
• mrtz-j/Saturn.OpenTelemetry: A OpenTelemetry Extension for Saturn

New Releases

• Akka.FSharp 1.5.57
• FSharp.Azure.Quantum 1.3.2
• FCQRS.Model 5.0.1
• Xanthos 0.1.0
• CloudflareFS.Management 0.1.0
• CloudflareFS.Runtime 0.1.0
• Feliz.Template 5.0.0
• Hedgehog 2.0.0
• Hedgehog.Xunit.v3 2.0.0
• FSharp.Core 10.0.101
• FSharp.Compiler.Service 43.10.101
• Fantomas.FCS 8.0.0-alpha-001
• Paket 10.0.0-alpha011

Hm… Serena #fsharp

— Sergey Tihon 🦔🦀 (@sergeytihon.com) 2025-12-08T22:13:13.971Z

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 Conf 2025 Recap – Celebrating .NET 10, Visual Studio 2026, AI, Community, & More – .NET Blog
• Introducing Data Ingestion Building Blocks (Preview) – .NET Blog
• Cross-Platform Age Verification in .NET MAUI Applications – .NET Blog
• Unlocking the Power of Web with Copilot Chat’s New URL Context – Visual Studio Blog
• Visual Studio 2026 November 2025 Update
• Pipe dreams to pipeline realities: an Aspire Pipelines story | Aspire Blog
• Introducing the VS Code Insiders Podcast
• Progress on TypeScript 7 – December 2025 – TypeScript
• Profiler Agent – Delegate the analysis, not the performance – Visual Studio Blog
• The “Golden Triangle” of Agentic Development with Microsoft Agent Framework: AG-UI, DevUI & OpenTelemetry Deep Dive | Semantic Kernel

Videos

Link to blog post: jvaneyck.wordpress.com/2025/12/04/f…Showcase video: youtu.be/_AxsTQDxSbc?… #fsharp #FsAdvent

— Jo Van Eyck (@jovaneyck.bsky.social) 2025-12-04T16:32:41.580Z

• I built fsi-mcp and now all my LLM’s think in F# code – Jo Van Eyck
• Cancellation Tokens with Stephen Toub
• 🎄 Advent of code 2025 in F# – day 02
• 🎄 Advent of code 2025 in F# – day 03
• 🎄 Advent of code 2025 in F# – day 04
• 🎄 Advent of code 2025 in F# – day 05
• 🎄 Advent of code 2025 in F# – day 06
• ASP.NET Community Standup – .NET Conf 2025 release roundup
• .NET AI Community Standup – Build Cross-Platform .NET Apps with Uno Platform & AI!
• .NET MAUI Community Standup – .NET 10 Announcements Roundup

Blogs & FsAdvent

• The Oxpecker 2 – The Oxpecker 2
• Domain Modeling Made Denumerable – Steve Goguen
• Building ‘Ask AI’ – Building ‘Ask AI’
• Language Server Protocol in F# – Sam Smucny
• Parallelising Heterogeneous Async Calls – Nick
• fsi-mcp: injecting AI coding agents into my F# REPL workflow – Jo Van Eyck

Let the party begin!medium.com/@lanayx/the-…#fsharp #FsAdvent #oxpecker

— Vladimir Shchur (@lanayx.bsky.social) 2025-12-01T01:34:02.283Z

F# vNext

• Nested field update syntax for records – field disambiguator · Issue #1456
• Deprecate non-zero-based Array2Ds, fixing trimmability · Issue #1454

Highlighted projects

• sgoguen/DenseCheck: A .NET Library for Systematically Generating Test Cases for Your Domain Model
• ssmucny/FsharpLspExample -Language Server Protocol in F#
• totallymoney/FsCDK: AWS Cloud Development Kit (AWS CDK) For F#
• dbrattli/Feliz.ViewEngine: Feliz DSL and engine for HTML generation and server side rendering (SSR)

New Releases

• Oxpecker 2.0.0
• Feliz.ViewEngine 1.0.3
• DenseCheck 0.1.0
• FSharp.Data.GraphQL.ProjectTemplates 3.0.0
• FSharp.Data.GraphQL.Server 3.0.0
• Farmer 1.9.26
• FsiX.Cli 0.1.1
• fantomas 7.0.5
• FSharp.ReactiveWpf 0.0.8
• linq2db.FSharp 6.0.0
• FSharp.Azure.Quantum 1.2.5
• Mingine.Physics 1.2.0
• Numerics.NET.FSharp 10.1.0
• Hedgehog 1.1.0
• Hedgehog.Xunit.v3 1.1.0
• FSharp.Idioms 1.5.4
• Str 0.21.0
• Fumble 2.0.1
• Fabulous.AST 1.8.0
• Fable.Electron 39.2.4
• SwaggerProvider 3.0.0-beta01

ReSharper and Rider 2025.3 release party is incoming! 😃 📅 December 9, Tue, 4pm UTC🗣️ Our .NET Advocates and @auduchinok.bsky.social🎁 Lots of new features!🤔 Bring all your questions!#dotnet #devtools #ai #csharp #fsharp #ama

— JetBrains Rider (@jetbrains-rider.bsky.social) 2025-12-03T16:38:53.5694242Z

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

• Gazelle (A Fast Engine for Structural Engineering) is written in F#
• .NET Day on Agentic Modernization Coming Soon – .NET Blog
• Visual Studio – Built for the Speed of Modern Development – Visual Studio Blog
• Announcing ASP.NET Core OData 10.0.0 Preview 1 – OData
• Announcing OData Model Builder 3.0.0 Preview 1 Release – OData

Fable 4 and Fable 5, both got a new release to make them work with .NET 10 🎉 #fsharp #fablecompiler

— Maxime (@mangelmaxime.bsky.social) 2025-11-25T22:19:29.580Z

Videos

• TinySelf 6.1 – History and foundations
• TinySelf 6.2 – Using the Self programming system
• TinySelf 6.3 – Working with mutable data in F#
• TinySelf 6.4 – Code structure and step-by-step guide
• A Better Alternative to TypeScript? Meet Fable! – YouTube
• Why I’m Moving my Blog from F# to C#

Blogs

• TUnit — Why I Spent 2 Years Building a New .NET Testing Framework | by Tom Longhurst
• F# Advent Calendar in English 2025 – Sergey Tihon

F# vNext

• Deprecate non-zero-based Array2Ds, fixing trimmability · Issue #1454
• byref and inref for loops · Issue #1453

Highlighted projects

• Feather – Feather is a lightweight namespace for generic F# tools and libraries — utilities I build “on wings of F#”
• thinkbeforecoding/fulmin: A server and client library for Gemini protocole in F#. – Codeberg.org

Non periodic reminder that there's an unofficial F# discord where some members of the community hang outdiscord.gg/fsharp-19669…#programming #languages #dotnet #fsharp #developers

— Angel Munoz (@tunaxor.me) 2025-11-30T04:29:44.122Z

New Releases

• Ecng.Compilation.FSharp 1.0.115
• FSharp.ReactiveWpf 0.0.5
• Oxpecker 2.0.0
• Oxpecker.OpenApi 2.0.0
• Oxpecker.Htmx 2.0.0
• Oxpecker.ViewEngine 2.0.0
• FSharp.Azure.Quantum 1.2.1
• WoofWare.Myriad.Plugins 9.1.4
• WoofWare.FSharpAnalyzers 0.2.9
• Hedgehog 1.0.0
• Hedgehog.Xunit.v3 1.0.0
• Akka.FSharp 1.5.56
• Jade.Core 4.3.0
• Jade.Marten 4.3.0
• Falco.Datastar 1.2.0
• Fable.Electron 39.2.4
• FsiX.Cli 0.1.0
• slint 0.0.1
• FsCDK 0.1.0
• XParsec 0.2.4
• Feliz 3.0.0-rc.14
• Fable 5.0.0-alpha.17

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

• Introducing F# 10 – .NET Blog
• Introducing C# 14 – .NET Blog
• Introducing Major New Agentic Capabilities for GitHub Copilot in JetBrains and Eclipse – Microsoft for Java Developers
• Introducing the Visual Studio Code Private Marketplace: Your Team’s Secure, Curated Extension Hub 🎉
• Develop Faster with VS Code for the Web – Azure Guide | All things Azure
• Azure DocumentDB is Now Generally Available – Azure Cosmos DB Blog
• Reinventing how .NET Builds and Ships (Again) – .NET Blog
• Supercharge Your Test Coverage with GitHub Copilot Testing for .NET – .NET Blog
• A step-by-step guide to modernizing .NET applications with GitHub Copilot agent mode – .NET Blog
• Unlocking the full power of Copilot code review: Master your instructions files – The GitHub Blog
• Migrating from Microsoft Learn to aspire.dev | Aspire Blog

Only 4 slots left in the main timeline #fsharp #FsAdent

— Sergey Tihon 🦔🦀 (@sergeytihon.com) 2025-11-20T07:00:51.556Z

Videos

• F# 10 – Amplifying FSharp
• TinyProlog 5.1 – How logic programming works
• TinyProlog 5.2 – Structure, unification, resolution
• TinyProlog 5.3 – F# tricks and step-by-step guide
• A Better Alternative to TypeScript? Meet Fable! – YouTube
• .NET Data Community Standup – EF 10 release celebration 🎉
• TUIs Are Back (Although They Never Left): Creating Modern CLI Apps in .NET.
• State of the .NET Foundation and .NET Open Source
• .NET AI Community Standup – Ignite Highlights + the Custom Avatar Deep Dive

Blogs

• F# 10 Brings Performance Improvements – InfoQ
• What’s New for C# 14 and F# 10 in .NET 10 — Visual Studio Magazine
• The Three Read Models of Event Sourcing (Benchmarked in F#) | by Tony Lucca | Nov, 2025 | Medium

F# vNext

• [Poll] Consider changing the default of fsharp_multiline_bracket_style · Issue #3200 · fsprojects/fantomas
• byref and inref for loops · Issue #1453
• Propose new method invocation syntax: obj.Method.[|args|] and obj.Method.{|namedArgs|} · Issue #1452
• Support `UnsafeAccessorAttribute` · Issue #1451

Introducing F# 10 #fsharp devblogs.microsoft.com/dotnet/intro…

— Jon Sagara (@jonsagara.com) 2025-11-17T18:14:31.057Z

Highlighted projects

• thinkbeforecoding/fulmin: A server and client library for Gemini protocole in F#. – Codeberg.org
• evgTSV/NRayUI: Library for creating UI based on Raylib binding
• AndrewIOM/bristlecone: An F# library for mechanistic modelling of ecological time series data
• starfederation/datastar-dotnet: Official Datastar Dotnet SDK.
• hedgehogqa/fsharp-hedgehog-experimental: Hedgehog with batteries included: Auto-generators, extra combinators, and more.
• kullbom/dbflow: DbFlow is a library that helps with schema oriented database tasks
• AngelMunoz/Kipo: F# + MonoGame
• mavnn/VisualInk: Writing visual novels using Ink from Inkle.
• jkone27/FsharpWebApi: fsharp web api example

New Releases

• Giraffe.OpenApi 0.0.3
• Jade.Marten 4.1.0
• Hedgehog.Experimental 0.10.0
• fulmin.server 0.1.1
• fulmin.client 0.1.1
• JDeck 1.0
• NRayUI 0.0.1
• FSharp.SystemCommandLine 2.0.0
• DbFlow 0.6.0
• TableAPI 1.0.4.1
• StarFederation.Datastar 1.1.2
• ProteomIQon.AddDeducedPeptides 0.0.3
• Partas.GitNet 1.1.2
• FSharpLint.Core 0.26.8
• fslint 0.0.1
• Bristlecone 3.0.0-beta1
• Feliz 3.0.0-rc.12
• Fable 5.0.0-alpha.15

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

• What’s new in F# 10 – F# Guide – .NET | Microsoft Learn
• What’s new in C# 14 | Microsoft Learn
• Announcing .NET 10 – .NET Blog
• What’s New in Rider
• OpenAPI.NET: The Biggest Update Ever – OpenAPI at Microsoft
• Aspire 13 – Aspireify anything | Aspire Blog
• Visual Studio 2026 is here: faster, smarter, and a hit with early adopters – Visual Studio Blog
• A first look at the all‑new UX in Visual Studio 2026 – Visual Studio Blog
• How Copilot Studio uses .NET and WebAssembly for performance and innovation – .NET Blog
• Introducing Copilot auto model selection (preview) – Visual Studio Blog
• Azure MCP Server Now Built-In with Visual Studio 2026: A New Era for Agentic Workflows – Visual Studio Blog
• Roadmap for AI in Visual Studio (November) – Visual Studio Blog

F# Advent Calendar in English 2025 #fsharp #FsAdvent sergeytihon.com/2025/11/03/f…

— Sergey Tihon 🦔🦀 (@sergeytihon.com) 2025-11-03T21:26:49.016Z

.NET Conf 2025

• Matthew Watt Smatterings of F# – YouTube
• Welcome to .NET 10 & Visual Studio 2026! – YouTube
• What’s New in C# 14 – YouTube
• What’s New in ASP.NET Core – YouTube
• Performance Improvements in .NET 10 – YouTube
• What’s New in NuGet – YouTube
• What’s New in Containers for .NET 10 – YouTube
• Build better web apps with Blazor in .NET 10 – YouTube

Videos

• Functional Programming in F#: Fad or Fabulous? — Ken Bonny
• On .NET Live | Building Real-World AI Agents with Agent Framework
• .NET MAUI Community Standup – A Journey to 10 Years of Grial

Hey #fsharp! Ionide 7.29.0 / FsAutocomplete 0.81.0 is out and brings F# 10 and .NET 10 support! Give it a try and report issues when you find them!

— Jimmy Byrd (@theangrybyrd.bsky.social) 2025-11-13T15:21:27.108Z

Blogs

• MLIR Testing with Teeth – Houston Haynes
• Introducing Conclave – Houston Haynes
• F# Domain Model with Event Sourcing vs C# with Entity Framework | by Tony Lucca
• Easier reflection with [UnsafeAccessorType] in .NET 10 – Andrew Lock
• Duende Software – Identity and Access Management for .NET | Duende

F# vNext

• [Poll] Consider changing the default of fsharp_multiline_bracket_style · Issue #3200
• Allow defining covariant/contravariant type parameters for use in other .NET languages · Issue #1450

Dear #fsharp, we're asking again about a possible Fantomas default change: github.com/fsprojects/f…With 500+ downloads a day and only ~130 votes, we simply don’t have enough data yet. Absolute numbers matter before making such a decision.

— Florian Verdonck (@nojaf.com) 2025-11-13T09:08:46.676Z

Highlighted projects

• afxres/binary: Serialization library for C# and F#.
• DCPRevere/jade – F# Event Sourcing Library
• cmeeren/BatchIt: Call batched functions as normal function
• ninjarobot/FSharp.Text.Docker: Build dockerfiles and run docker commands from F#
• j-alexander/FSharp.Data.JsonPath: JsonPath for F# Data JsonValue
• CSBiology/DynamicObj: F# library supporting Dynamic Objects including inheritance in functional style
• G-Research/ShapeSifter: Type-safe datatype-generic programming for F#
• G-Research/HeterogeneousCollections: Type-safe heterogeneous collections for F#
• ionide/Fornax: Scriptable static site generator using type safe F# DSL to define page templates.
• mavnn/VisualInk: Writing visual novels using Ink from Inkle.
• Freymaurer/Fable.Multiverse: A template to get up and running as fast as possible with Fable and publishing to multiple languages.

New Releases

• Paket 10.0.0-alpha011
• Aardvark.Paket 10.0.0
• Giraffe 8.2.0
• FSharp.SystemCommandLine 2.0.0
• Felicity 0.24.4
• DbFlow 0.6.0
• ReactiveElmish 1.5.0
• ReactiveElmish.Avalonia 1.5.0
• fsdocs-tool 21.0.0
• FSharp.Formatting 21.0.0
• Numerics.NET.FSharp 10.0.0
• Mikodev.Binary.FSharp 5.10.0
• FSharp.Text.Docker 1.0.17
• FSharp.Data.JsonPath 1.1.3
• Farse 0.6.0
• BatchIt 1.2.1
• FDocument 0.1.0
• HeterogeneousCollections 1.1.2
• FsUnit.Light.NUnit 1.1.0
• DynamicObj 7.1.0
• ShapeSifter 1.1.19
• Pulsar.Client 3.13.0
• altcover 9.0.102
• Fornax.Core 0.16.0
• FSharpLint.Core 0.26.6
• Ionide.Analyzers 0.14.10
• FSharp.Compiler.Service 43.10.100
• Equinox.Templates 7.0.0

🌈 After 2 years of serious side-project hustle, we’ve built a limited batch of 100 PXL Clocks – premium programmable clock for developers and design lovers.Use code "fsharp" for a 50€ discount and bring light into your workspace.👉 pxlclock.com#fsharp #pxlclock #csharp #pixelart

— SchlenkR (@schlenkr.bsky.social) 2025-11-08T11:40:40.549Z

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 Conf 2025 – November 11 ‐ 13 (.NET 10 & VS 2026)
• Join us at .NET Conf: Dive into the future of development with Visual Studio 2026 – Visual Studio Blog
• Introducing Custom Agents for .NET Developers: C# Expert & WinForms Expert – .NET Blog
• 💫 Welcome to Aspire: Your stack, streamlined | Aspire Blog
• Visual Studio 2022 17.14 October Update
• Announcing Azure MCP Server 1.0.0 Stable Release – A New Era for Agentic Workflows – Azure SDK Blog

Videos

• Demystifying the Enigma Machine – a Functional Journey – Isaac Abraham – NDC Copenhagen 2025 – YouTube
• .NET Liverpool Lightning Talks 2025 – YouTube
• On .NET Live | Building agentic systems with local-first SLMs

Blogs

• Announcing Elmish Land 1.1 Preview | Elmish Land
• An F# MCP Client Example – Kevin Logan
• Scala vs F# – Alexandru Nedelcu
• Coding games with a story – Michael Newton
• Achieving Safety In a Universally Contested Future – Houston Haynes

Highlighted projects

• CSBiology/DynamicObj: F# library supporting Dynamic Objects including inheritance in functional style
• nfdi4plants/Swate: Excel Add-In for annotation of experimental data and computational workflows.
• informedica/GenPRES: Enable Safe and Efficient medication prescription, preparation and administration

New Releases

• Farmer 1.9.25
• Oxpecker 1.5.0
• FsUnit.Light 1.1.0
• fake-cli 6.1.4
• FSharpPlus 1.8.0
• Akka.FSharp 1.5.55
• FSharp.Idioms 1.5.3
• Fsharp.wpf 0.3.0
• DynamicObj 7.1.0
• Swate.Components 1.0.2
• ARCtrl 3.0.0-beta.11
• Feliz 3.0.0-rc.3

Just published a new version of FsUnit.Light package with new functions for testing exceptions in your taskswww.nuget.org/packages?q=F…#fsharp

— Vladimir Shchur (@lanayx.bsky.social) 2025-11-02T00:26:06.571Z

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

• Announcing Sponsorship on NuGet.org – .NET Blog
• Upgrading to Microsoft Agent Framework in Your .NET AI Chat App – .NET Blog
• Introducing Planning in Visual Studio (Public Preview) – Visual Studio Blog
• Expanding Model Choice in VS Code with Bring Your Own Key
• Integration Testing with Testcontainers – ISE Developer Blog
• Exciting new capabilities and enhancements for M365 Developer Program – October 2025 – Microsoft 365 Developer Blog

Announcing Sponsorship on NuGet[dot]orgis.gd/QYDXvi #dotnet #devcommunity #nuget #packagemanagers #sponsorship

— Alvin Ashcraft (@alvinashcraft.com) 2025-10-24T17:01:49.087Z

Videos

• NYC Functional Programming Videos – YouTube
• TinyHM 4.1 – How type inference in ML works – Tomas Petricek
• TinyHM 4.2 – Type systems and constraint solving – Tomas Petricek
• TinyHM 4.3 – Peano numbers and step by step guide – Tomas Petricek
• On .NET Live | Countdown to .NET Conf 2025
• ASP.NET Community Standup – The MCP authorization flow
• .NET AI Community Standup – Microsoft Agent Framework: Workflows & Migration Overview

In the next lab from my Tiny Systems course, you learn how type inference in ML-like languages works and write your own Hindley-Milner inference algorithm!🎞️ Watch the videos: http://www.youtube.com/watch?v=FUFQ…⌨️ Get the #fsharp code: github.com/tpetricek/ti…

— Tomas Petricek (@tomasp.net) 2025-10-23T19:58:41.426Z

Blogs

• Count distinct items with the CVM algorithm · Mathias Brandewinder blog

Highlighted projects

• fcolavecchia/fp-course-public: Make F# your first programming language
• ingted/Akka.WebSocket: Bind Akka.net and Suave WebSocket
• AngelMunoz/Kps: F# and MonoGame Project Structure
• ForNeVeR/Fabricator: The sharpest infrastructure automation tool.

New Releases

• FSharp.Idioms 1.5.1
• FSharp.Data.Npgsql5 3.0.2
• FAkka.WebSocket 1.0.3
• FsMath 0.0.2
• Akka.FSharp 1.5.54
• runfs 1.0.8
• ShapeSifter 1.1.17
• WoofWare.Myriad.Plugins 9.0.4
• G-Research.FSharp.Analyzers 0.19.0
• WoofWare.FSharpAnalyzers 0.2.1
• Feliz 3.0.0-rc.3
• Giraffe 8.1.0-alpha-001
• FSharp.Stats 1.0.0-preview.1
• Vitest 1.0.0-rc.2

I guess I forgot to mention that I added a bit of enemy behaviorLooks like cooldowns are not actually working, I need to check on that also, looks like dead entities still process their last command instead of just stay still when they die#fsharp #dotnet #gamedev #monogame

— Angel Munoz (@tunaxor.me) 2025-10-24T20:09:41.672Z

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

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