Mattias Karlsson (he/him)

@devlead
620 Followers
359 Following
1.3K Posts
Partner & Technical fellow @wcomab
DevOps and Developer Tools Microsoft MVP.
.NET Foundation project / OSS maintainer.
Have been coding since the ’80s (C128 & Amiga).
Father of 2, and husband of 1.
Bloghttps://www.devlead.se
GitHubhttps://github.com/devlead
LinkedInhttps://www.linkedin.com/in/devlead
NuGethttps://www.nuget.org/profiles/devlead

My new job has required I use Google's Firebase, and in particular Firestore. I've been surprised by the memory consumption of the official emulator, and wondered if I could hack together in .NET that meeds our needs. I still don't know, but this is the result so far: https://github.com/mikegoatly/FirestoreSharp

#dotnet #opensource #gcp

GitHub - mikegoatly/FirestoreSharp: An open source .NET emulator for Google Cloud Firestore

An open source .NET emulator for Google Cloud Firestore - mikegoatly/FirestoreSharp

GitHub
I wonder if we will eventually stop and ask, "Who are we doing this for?"
AI can be helpful and cool, but for some of my projects, there's a bonsai gardener feel to it. I code for me, when I want, with intent & precision. I guess some aspects of the trade will be like classic car maintenance🤔

We're doing a #livestream today around a first look at our User Management library here at Duende. Think of it as an alternative to #aspnetcore Identity. It let's you manage users (shocking I know 😅), and their profile, passwords, auth mechanisms, and more.

#dotnet #aspnetcore #aspnet

https://www.youtube.com/live/aPaTmi4-qQY?si=gpLYvMYE8MB8YEBU

A First Look at Duende User Management

YouTube
Dew Drop – March 23, 2026 (#4630) – Morning Dew by Alvin Ashcraft

Just blogged: My NuGet packages hit a quarter-billion downloads. Just a number; I’m not sure it means much, but I turned it into a short note on NuGet, OSS, and the community.

https://www.devlead.se/posts/2026/2026-03-22-quarter-billion-nuget-downloads

#nuget #dotnet #oss

@devlead - Mattias Karlsson's Blog - A quarter of a billion NuGet downloads

A personal milestone and a short reflection on NuGet's history and what it has enabled for open source and the community

Just blogged: My NuGet packages hit a quarter-billion downloads. Just a number; I’m not sure it means much, but I turned it into a short note on NuGet, OSS, and the community.

https://www.devlead.se/posts/2026/2026-03-22-quarter-billion-nuget-downloads

#nuget #dotnet #oss

@devlead - Mattias Karlsson's Blog - A quarter of a billion NuGet downloads

A personal milestone and a short reflection on NuGet's history and what it has enabled for open source and the community

AREXX was written in 1987, 1990 AmigaOS included it by default with AmigaOS 2.0.
It allowed for inter process communication, applications could expose their internals for automation, essentially MCP four decades ago...
AREXX was written in 1987, 1990 AmigaOS included it by default with AmigaOS 2.0.
It allowed for inter process communication, applications could expose their internals for automation, essentially MCP four decades ago...
Nice, gone full OIDC for NuGet Gallery, all API keys deleted 👍 Took a while for over fifty packages.