React native expert at @callstackio

Joined July 2015
130 Photos and videos
Piotr Trocki retweeted
run Maestro tests 2x faster on Android with this tool » 𝚊𝚐𝚎𝚗𝚝-𝚍𝚎𝚟𝚒𝚌𝚎 𝚝𝚎𝚜𝚝
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Piotr Trocki retweeted
The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees. The net effect of this order is that we must abruptly disable Fable 5 and Mythos 5 for all our customers to ensure compliance. Access to all other Claude models is not affected. We apologize for this disruption to our customers. We believe this is a misunderstanding and are working to restore access as soon as possible. Read our full statement: anthropic.com/news/fable-myt…
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Want better mobile app performance? Try agent-device today and deliver a better product! Try it now 👇
Replying to @brandtnewlabs
I didn't guess at any of this: 🤖 I profiled every regression on real devices with @callstackio's agent-device: frame timing, CPU, and memory 👨‍⚕️ I held the codebase to a 100/100 health score with @aidenybai's react-doctor. 🧪 Pure tick functions, 95% test coverage.
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Piotr Trocki retweeted
Replying to @Jay_Shah_C @ipla03
because agent-device uses XCTest helper app for iOS integrations. contrary to popular belief it can be pretty quick, we're levering smarter caching recently, and it works on physical devices too!
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When you treat AI as a co-pilot, you don't have time for scrolling
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Piotr Trocki retweeted
Join us on June 11th in porto for @reactnativeOPO 2nd edition. We’ll be covering developing with AI and adding ai to your apps. You won’t want to miss it!
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Must have for react native development
Introducing Apex: a specialized, cost-efficient coding model for React Native. Built by Callstack for the work our engineers do every day: building apps, fixing framework-specific issues, reviewing architecture, and shipping one codebase across platforms. Now opening in private beta.
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Piotr Trocki retweeted
TesterArmy is the simplest way to QA your website or mobile app. It runs real tests across browsers and devices, catches regressions on every PR, generates tests from natural language, and much more. Try now and start testing in minutes: @TesterArmy
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Piotr Trocki retweeted
TesterArmy catches real bugs in production before they cost teams' revenue. This one blocked users from completing payment in a customer’s app. Our agent caught it automatically and surfaced it before more money was lost. Try it free: tester.army
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UI library maintenance used to mean hours of debugging. Not anymore with @callstackio's agent-device and @OpenAICodexCli It analyzed and fixed a tricky UI issue in minutes without e2e tests. If you maintain a UI library, this combo is a game-changer. The prompt I used 👇
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The prompt `Go to BasicExample screen via agent-device and swipe to the right and check if this text is displayed: "page number 2". If it is failing, analyze the issue and provide a fix`
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One of the coolest perks of open-sourcing your app: Real teams, all over the world, actively test it — finding edge cases and bugs you’d never catch alone. And it looks really cool on showcases
Gemini 3.5 Flash vs Composer 2.5 Fast 🏁 Running the same task on the iOS simulator using Argent Gemini finished over 2x faster 🤯
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Piotr Trocki retweeted
agent-device v0.15 is out. faster than ever on iOS ⚡
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Piotr Trocki retweeted
Our second talk at React Native OPO #2 will be presented by Xavier Costa, engineer at @UpholdInc @upholdtalent 👉🏻 Stop Profiling, Start Prompting. Research Loops with MCP React Native Porto #2 📅 June 11th | 18:00 - 20:00 📍 Porto Innovation Hub RSVP to the meetup below 👇🏻
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Piotr Trocki retweeted
Dear frontend devs and UI designers. I bring you Liquid DOM, a complete and faithful implementation of Liquid Glass on the Web. - Shape morphing - All properties animatable - Dynamic refraction and reflection - Adaptive tint - Adaptive specular highlight - Dispersion - Full html integration - Super fast layout engine that works across Canvas and html - Pointer event handling - Framework and renderer-agnostic low level API - High level React API - Ootb @threejs and r3f integration And lots more. Read on for implementation details and demos.
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Piotr Trocki retweeted
We just rolled out official support for @expo EAS! Run your agentic E2E tests in the EAS pipeline ✨
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React Native devs have been flexing with Flexbox since 2015 thanks to Yoga. Now Android joined this flex club 🚀 Welcome 🤗
FlexBox. FlexBox is a container that lays out items in a single direction. It can resize, wrap, align, and distribute space among items to optimally fill the available space. developer.android.com/develo…
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Piotr Trocki retweeted
we just added discord notifications for production monitoring. get pinged when your app breaks in prod ⬇️
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Piotr Trocki retweeted
Gemma 4 E2B running locally with ONNX RN & transformers.js - all that in React Native Cooking something new... 🍳
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Piotr Trocki retweeted
May 14
Cooking up something new 🧑‍🍳 Join the waitlist for early access to technical preview of the GitHub Copilot app 👇 gh.io/github-copilot-app?utm…
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