F# Weekly #15, 2026 – Akkling, FSharp.Data and RANSAC auto-tune

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.

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