Hi,
I am Erik
Software developer with nearly two decades of experience. Writing code for a living, writing about code for learning.
Community
I organize dotnet.amsterdam, a user group for .NET developers in the Amsterdam area. Follow us on LinkedIn or join us on Meetup.
Recent writing
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Nov 10 2026
Build an AI software factory (an experiment in .NET)
A series about handing software work to AI coding agents without handing off your judgement. I'm building a factory around them in .NET: where the work comes from, where agents run, how their output gets checked, what it costs, what they remember, and how people stay in charge of what ships. Each part takes one piece and describes what I learn while building it.
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Oct 12 2026
Labcoat: the web UI I was missing for my .NET tests in Aspire
I am a big fan of Aspire. It's the best way I know to give a project a proper onboarding experience, and it adds an extra layer of joy to building applications: everything that matters, in one view. On the frontend, that view includes my tests. Vitest UI gives me a web interface in which I bring my tests from red to green. On the backend I get dotnet test in a terminal, and while I feel at home there, watching my tests turn green is the one thing missing from my Aspire setup. So I built it: Labcoat, a web UI for tests on Microsoft.Testing.Platform that runs on its own or as a resource in your AppHost.
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Sep 27 2026
Do Angular apps need WebMCP when agents can already use the UI?
I gave six models the same todo tasks on two builds of an Angular app, one with WebMCP tools and one without: Claude Haiku, Sonnet and Opus in Claude Code, and GPT-6 Luna, GPT-5.6 Terra and GPT-6 Sol in Codex CLI. Every run succeeded either way. With the tools, agents needed fewer browser commands in all twelve pairs and finished faster in ten.
