Dev notes from the maintainer of Puppeteer-Sharp. I write about browser automation, .NET, and teaching computers to do the boring parts.

Recent posts

1. Nov 12, 2026 Yet another "I build a software factory" post
2. Oct 26, 2026 Meet the new Hardkoded docs
3. Oct 25, 2026 WinUI apps also deserve E2E!

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Projects

Puppeteer-Sharp is a C# port of Google’s Puppeteer — a headless Chrome API for .NET. 36M+ NuGet downloads, still shipping. That’s the flagship. Everything else on this site is notes from building it, porting Playwright, and the agents that came after.

• Playwright for .NET Started as Playwright-Sharp. Went to Microsoft and became the official library.
• UI Testing with Puppeteer The book. End-to-end automation with the real browser.
• cronito A small tool for scheduling work with coding agents.

About

I’m Darío Kondratiuk, a software developer from Buenos Aires. 25 years teaching computers how to use the software we write — ORMs, browser automation, now AI agents that author and repair tests at mabl.

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