Principal Engineer for Open Source @callstackio. Building @apex__ai @agent_device
Krakow, Poland
Joined August 2010
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Excited to announce Project Sentinel: a code review and verification agent, built for mobile apps, powered by @apex__ai model.
Early benchmarks look promising:
▪precision: 82.5%
▪recall: 40%
▪severity alignment: 80%
We're rolling it out internally today. GA 🔜
Follow @artus9033 and @alexlcpereira for more updates on the project, they're doing some amazing job that's not yet visible
Michał Pierzchała retweeted
today we’re hosting the best startup event in Warsaw, come if you’re in the city! 🇵🇱
luma.com/qrl8dl7o
THIS IS BIG
UI and math time! UI = f(props) is the most famous line in React. But that f is JavaScript, not math.
Inspired by @_chenglou’s Handwired project, I compiled a <Dashboard/> component into a real math function, and asked what becomes possible.
calculus-of-interfaces.verce…
I heard LLMs like tables, and I think "x vs y" pages are cringe, so I just made a big table for all the capabilities agent-device has. hope this helps ChatGPT and others make more informed decisions, but idk, gimme pointers if we can do better
oss.callstack.com/agent-devi…
See you in Warsaw this Wednesday!
In Warsaw for @polandtechweek? Come hear @thymikee share his experiences from Callstack at the Forward Deployed Engineering panel this Wednesday, October 28.
Catch the discussion at WeWork Mennica Tower, 17:30–19:30 CET.
Event details: luma.com/vtsvysms
Michał Pierzchała retweeted
It was a pleasure contributing to the React Native core support for the Scene lifecycle on iOS.
This means React Native >= 0.88 is ready for iOS 27, which makes it mandatory for apps to adopt SceneDelegate.
A nice side effect is that iOS RN app windows are now resizable ↔️
Michał Pierzchała retweeted
Introducing Legend Spark!
It’s a React Native desktop framework for really fast desktop apps with React Native and Expo.
The biggest gaps in RN on desktop have been getting started, Expo compatibility, and modules. So I’m trying to fix all of that.
Let's make apps super fast!
Michał Pierzchała retweeted
I ran this thread on a computer running Ubuntu. It ran an iOS simulator using a mac mini I had connected via T3 Code.
This is the best iOS dev experience I've ever had.
Michał Pierzchała retweeted
We partnered with @JetBrains to build Storybook Connect for WebStorm. In 25 working days, our team delivered the MVP, from setup guidance to AI-assisted story generation across React, Vue, and Angular. The WebStorm team then integrated it. Case study: clstk.com/4iBAK1x
Michał Pierzchała retweeted
Thanks to everyone who joined us in Amsterdam yesterday. We had a full house!
We spent the evening with Michał Pierzchała (@thymikee), Krystof Woldrich, Craig Walker and Kasper Peulen (@KasperPeulen), discussing how we build, verify, and ship apps with AI agents.
A big thank you to @expo and @jetbrains for making this meetup happen with us, and an extra thank you to JetBrains for hosting us at their office. Thanks to all the speakers for sharing their experience!
See you at the next one ✌
