I could not find a tool like DACPAC for PostgresSQL, so I did one. It's named pgpackage and supports DSC-style workflows for PostgresSQL. Still in beta test, so do not use on production unless you have a backup 😉 magnusopera.github.io/pgpackage/

I've added support for Fable to FScript following suggestion. Package is still not published to npm registry but I hope this will come next week. Meanwhile, you play with the sandbox: magnusopera.github.io/FScript/sand...

FScript Sandbox | FScript

Run FScript in the browser with the Fable JavaScript runtime.

magnusopera.github.io

FSharp.MongoDB enables #fsharp types support to #mongodb .net driver. Latest release (0.6.0-beta) ensures correct behavior for ArrayOfDocuments and better contribution guidelines. github.com/fsprojects/F...

FScript got new features in latest release: - asynchronous tasks - LSP enhancements for built-in functions - a simple BASIC interpreter in FScript (yes an interpreter in an interpreter 😁) magnusopera.github.io/FScript/

FScript

A lightweight, embeddable interpreter with an F#/ML-style language.

magnusopera.github.io

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

The wait is over! Fable 5 Release Candidate is officially here. After a year of hard work from the community, we're bringing you: ✨ .NET 10 & F# 10 support 🐍 A massive Python update (now powered by a Rust core & PyPI!) 🌐 Cleaner JS/TS Pojo bindings fable.io/blog/2026/20... #fsharp #fablecompiler

"Pure-F# training/inference workflow around Qwen3-4B with NVFP4" by @ingted.bsky.social #fsharp github.com/ingted/Qwen3...

FScript has grown a lot ! It's now a fully fledge embeddable functional language with nice features: - tuples, records, unions, lists, options, map - great matching ergonomics - standard library for types - embeddable with clear sandbox model Enjoy ! Link to tutorial: github.com/MagnusOpera/...

I'm really happy with current state of FScript: - F#/ML-style scripting focused on safe embedding: strong type inference, explicit host extensibility, and sandboxed execution. - Hindley–Milner inference with optional parameter annotations. 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

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/...

This is how I've implemented string interpolation in Terrabuild last year - it's easy once you understand lexer needs to be context sensitive (kind of aha moment) - at least with FsLexYacc. Link to implementation in #fsharp, as there are few simple materials on the topic. github.com/MagnusOpera/...

terrabuild/src/Terrabuild.Lang at main · MagnusOpera/terrabuild

Seamless CI/CD tool for building and deploying monorepos. Support HCL-like configuration, builds in containers, outputs caching, extensions. - MagnusOpera/terrabuild

github.com

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

I love when ChatGPT writes "production-ready" code 😏

GitHub merge queues are a great tool but such a pita to configure and terribly buggy. Go in Hell @github.com 🤬

The best thing I did last week was to disable copilot. For PR it’s useful but as a tool to get things done in IDE, what a waste of time. I just want smart completion based on my types, not this shit that understands nothing to what I’m doing. Unfortunately it seems IntelliSense is no more.

The type inference difference in C# between a nullable struct and a nullable class is shitty at best.

Just a quick note to say that I'm currently looking for work. Either Node/Typescript or .NET/C#. Happy to consider contract or perm, but must be remote. Thanks all! RT appreciated 🙏

🚀 .NET 10 Preview 4 is here! ✨ Tons of Blazor & OpenAPI improvements 📱 Android app size reduction 🤖 AI data upgrades for EF Core ⚡ Inlining improvements 📦 New async ZIP APIs & so much more! Learn more: devblogs.microsoft.com/dotnet/dotne... #dotnet

.NET 10 Preview 4 is now available! - .NET Blog

Find out about the new features in .NET 10 Preview 4 across the .NET runtime, SDK, libraries, ASP.NET Core, Blazor, C#, .NET MAUI, and more!

devblogs.microsoft.com

I't s been a while I wanted to implement interpolated string for Terrabuild but was always feared how to do this due to the strong relationship between parser and lexer. I've finally come to something easy to understand using rules in FsLex. Parser is available here: github.com/MagnusOpera/...

Terrabuild/src/Terrabuild.Lang at main · MagnusOpera/Terrabuild

Seamless CI/CD tool for building and deploying monorepos. Support HCL-like configuration, builds in containers, outputs caching, extensions. - MagnusOpera/Terrabuild

github.com

I was reading the announcement of @rescript-lang.org about upcoming nested record definitions and asking myself if #fsharp was able to do this. And of course, #fsharp is able to do this using anonymous records !

Prague has the most beautiful churches ! Love this town, Easter week-end is ending tomorrow 🥲

I honestly hate node and zod - even with Typescript - it's so bad. This is probably why I prefer to stay in .net world and use only typescript/react on the front only. But I came across deepkit.io, this looks crazy good on the surface: strongly typed & looks similar to aspnet .

I've done shitty things in my professional life, but ruby on rails is for sure the worst. In 2025, this feels like a punishment 😭

Why the hell is AWS so complicated 😭

Announcing FSharp.Aspire.Hosting: A package to write Aspire app hosts in F#! https://github.com/Tarmil/FSharp.Aspire.Hosting * Includes the msbuild machinery and library extensions necessary to write Aspire AppHosts in F# * There's a project template to […] [Original post on mastodon.tarmil.fr]

Blogged (my little rant): "Is Rust a good fit for business apps?" www.bartoszsypytkowski.com/is-rust-a-go...

Always wanted @github.com to have a sticky header. It's a pain when you are deep in actions to go somewhere else. Yes I can navigate back, but well 🤷‍♂️

Is an embeddable #fsharp interpreter (and without dependency on .net sdk) a thing ?

So… How things are going on regarding better #fsharp support for MongoDB ? Well, I’ve stopped investing in previous fork because there were a lot of issues. Looking at the MongoDB C# driver implementation, conventions were not correctly defined so more work had to be done here...

Pierre Chalamet@pchalamet.bsky.social · 2y ago

I have updated MongoDB.FSharp (it was old and abandoned) to .net 9/nullable and latest MongoDB.Driver. Support for #fsharp List, Map, Set, DU, Option, ValueOption. As it's be revamped, it is now named 𝗙𝗦𝗵𝗮𝗿𝗽.𝗠𝗼𝗻𝗴𝗼𝗗𝗕.𝗗𝗿𝗶𝘃𝗲𝗿 and is available on NuGet. github.com/pchalamet/FS...

as a command line junky, it's impressive how fast Ghostty is. ghostty.org

Ghostty

Ghostty is a fast, feature-rich, and cross-platform terminal emulator that uses platform-native UI and GPU acceleration.

ghostty.org