Mike

Mike

@grabbou.com

Objective-C was great 💔 cto and founder at callstack, react native core contributor

1K followers 63 following199 posts

PSA: we run a monthly React Native newsletter 📨 What's included? - Key announcements from community - React Native releases - Open Source updates from our team - Practical guides from real projects A clear summary of everything we shared on X that month. The easiest way to catch up!

You can read each month here on our website www.callstack.com/newsletter, or subscribe!

callstack.comReact Native Newsletter | Expert Insights & Ecosystem Updates | CallstackStay on top of the React & React Native ecosystem with our developer newsletter. Get exclusive insights, trends, and updates from core contributors.

If you haven't done it yet, you should also definitely subscribe to weekly newsletter by @sebastienlorber.com. It's packed with insane amount of information from both React and React Native! thisweekinreact.com

thisweekinreact.comThis Week In React | This Week In ReactA weekly newsletter to stay up-to-date with React & React-Native

Always great to see others putting my work to use and sharing feedback! Made my day 🩵

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With React Native AI, we ship precompiled libraries for the most popular models. This setup is reduced to zero.

Try it out today! `@react-native-ai/apple` and AI SDK!

Always great to see others putting my work to use and sharing feedback! Made my day 🩵

What are prebuilds in this context? (Not React Native this time!) MLC needs its runtime and model libraries compiled before use. Until now, that meant extra manual steps before you could run a model locally.

With React Native AI, you can choose the right provider for your use case: - Apple provider → system models built into iOS - MLC provider → run any supported model locally

Get started today. Check out our repository github.com/callstackin...

github.comGitHub - callstackincubator/ai: On-device LLM execution in React Native with Vercel AI SDK compatibilityOn-device LLM execution in React Native with Vercel AI SDK compatibility - callstackincubator/ai

Run any model locally with React Native AI and AI SDK ⚡️

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It's an interesting alternative: you can mix both providers, e.g. run Apple on-device first while your remote model downloads in the background. x.com/grabbou/sta...

The MLC provider is part of a broader suite of our tools for running AI on mobile devices. Check them all out here and star the repo! 🔗 github.com/callstackin...

github.comGitHub - callstackincubator/ai: On-device LLM execution in React Native with Vercel AI SDK compatibilityOn-device LLM execution in React Native with Vercel AI SDK compatibility - callstackincubator/ai

Run any model locally with React Native AI and AI SDK ⚡️

What is going on here? - MLC is an optimized runtime for running different models on iOS, Android, and desktop GPUs - We download the model weights onto the device - Finally, we load it into the engine and set up everything needed for inference

Unlike the Apple provider, the MLC provider doesn’t rely on system-wide models. It downloads weights for each model you use, which can take time.

React Native on Android emulator showing the red box "Unable to load script"? Here's how to fix it 👇

We cover the common causes and solutions: - Reverse ADB port - Update network configs - Reset emulator data Step-by-step here: www.callstack.com/blog/debugg...

In case you missed it: all React Universe Conf talks are now on YouTube! 📹 22 videos on everything from UI building and React best practices to deep dives into C++ internals of React Native! Brush up on the latest before React Conf! www.youtube.com/watch?v=9vc...

youtube.comReact Universe Conf 2025 Promo VideoReact Universe Conf is where the React and React Native worlds collide to push the limits of cross-platform and full-stack development. Join core contributor...

We're over 700 now! Make sure to star it and drop some local AI experience into your app now that iOS 26 is out! x.com/SzymonRybcz...

Here's the repo: github.com/callstackin...

github.comcallstackincubator/aiOn-device LLM execution in React Native with Vercel AI SDK compatibility - callstackincubator/ai

You know that @chmal.it is cooking 🧑‍🍳 with Rozenite. He's in Prague tomorrow doing a deep dive into React Native DevTools. Ever wondered how they actually work? He reverse-engineered the whole thing and built a plugin framework around it.

Here's the link with details: www.callstack.com/events/how-...

callstack.comHow I Hacked React Native DevTools (And Built a Plugin Framework) | CallstackLearn how React Native DevTools work under the hood, and how to inject custom plugins with clean hooks and no forks.

Together with Expensify, we're hosting meetup on all things React Native in San Francisco this Thursday! Great opportunity to meet in person and grab your paper copy of Ultimate Guide to React Native! Link to meetup registration in next tweet 🧵

Book your slot here www.callstack.com/events/react...

callstack.comReact Universe Meetup, San Francisco with Expensify | {callstack}Callstack and Expensify will present React Native Enterprise Framework

Mike reposted

bittersweet news: today is my last day at Bluesky. 💙 i’m very thankful to the team for letting me learn many new things on the job (including React Native). i’m wishing them luck in the improbable — but inevitable — task of making decentralized social media usable and competitive.

Mike reposted

Microfrontends for mobile? It always felt like an R&D project—until now. With Re.Pack & Zephyr Cloud, you can actually deploy them today. On React Universe On Air, I spoke with Zack Chapple & @jbroma.dev about what makes this possible & how it changes mobile dev. 🎧 Listen here: hubs.li/Q034sJZt0

hubs.liMobile Microfrontends With Zephyr Cloud and Re.Pack | {callstack}Get ready for faster development cycles and reduced risks when rolling out updates for mobile apps with microfrontends enabled by Zephyr Cloud and Re.Pack.

So, as far as Bluesky goes, I think I will have to split my video up into even smaller chunks 😂

🎉 Announcing Flows AI: A light-weight library to build agent workflows, on top of Vercel AI SDK. ✅ No unnecessary abstractions. ✅ Use any LLM and provider of your choice. ✅ All patterns from Anthropic article provided out of the box. Read announcement and check it on GitHub ⬇️

www.callstack.com/blog/flows-a...

callstack.comFlows AI: Your Library for Building AI Workflows on Top of Vercel AI SDK | {callstack}Discover Flows AI, a lightweight library for building AI workflows with Vercel AI SDK. Simplify agent orchestration and explore flexible, scalable solutions.

github.com/callstackinc...

github.comGitHub - callstackincubator/flows-ai: Run complex AI workflowsRun complex AI workflows . Contribute to callstackincubator/flows-ai development by creating an account on GitHub.

Mike reposted

A new version of React Native Bottom Tabs 0.8.0 is out! 🎉 Lots of work went into this release: - Complete refactoring of Android view management ♻️ - New Android Page Transitions ✨ - Material You support 🎨 - Other bug fixes 🔧

Double checking in 2025, is there an app to cross-post to Bluesky from X? 🤔

Great breakdown of common agentic flows implemented with Vercel AI SDK!

Callstack@callstack.com

AI Agents' workflows are not that hard to implement. @q1w1n.bsky.social's article proves it and gives you examples to play with!

Love debugging with Cursor: > Ah, now I understand the core issue. The problem is that 😂 Repeat infinitely

A bit too many `react-native start` today

Mike reposted

Solving issues around Swift’s modular headers in React Native can be challenging 👀 In this article, I’m going over a few solutions that will help you resolve them! Check it out ⬇️ https://buff.ly/3DZmDkY

After eating 1kg+ apples every day for 2 years, I am officially done... 😂

You know it's a good rewrite coming up! AI space is pretty interesting. Everyone's building AI agents and AI agent frameworks right now. So many different approaches. Everything changes each week. Decided to focus on building some production workflows, hopefully this is the last one 😂

Excited to be back on the React Universe On Air! Memories are back! I love going live, streaming, and being in front of the camera, so hopefully we can get some more content this year!

Callstack@callstack.com

We're thrilled to welcome back @grabbou.com as host and the return of At Scale series! This time, we're diving deep with Mustafa Ali, Director of Engineering at Shopify, to explore to discuss the ins and outs of their migration to React Native.

Totally unrelated, but I in preparation for eye surgery, I moved from contact lenses to glasses after 6 years and WOW, what a difference. Except for the fish eye effect 🤣

Let's gooo! Looking forward. I will be finally able to catch-up with everything thanks to @lukasz.app forcing me to it 🤣

lukasz.app@lukasz.app

Kicking off 2025 with a livestream tomorrow! 🎉 I’ll be live with @grabbou.com at 7 PM CET (1 PM EST | 10 AM PST). We’re still figuring out the topic, but whatever it is, it’ll be fun. Come hang out with us! 😄 You can find the live stream here: www.youtube.com/watch?v=Wjzy...

youtube.comCallstack livestreamYouTube video by Callstack Engineers

React Native Fast IO is out there on `npm`, latest version `0.2.0`. If you're building something with WebSockets in the next few weeks, I'd love if you could give it a go! [link in thread]

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We've been very busy working on the I/O primitives and you can expect a complete revamp of them in January. Right now, you can use WebSockets (that is not going to change) and treat the rest as a playground of what's possible.

Our work in that field is tightly coupled with WebAssembly work that we're doing some groundwork behind the scenes to move this module forward.

React Native Fast IO is out there on `npm`, latest version `0.2.0`. If you're building something with WebSockets in the next few weeks, I'd love if you could give it a go! [link in thread]

github.com/callstackinc...

github.comGitHub - callstackincubator/react-native-fast-io at v0.2.0Blazing fast I/O for React Native, built on top of Nitro - GitHub - callstackincubator/react-native-fast-io at v0.2.0

Really excited about this! Nitro Modules are awesome (more on that in my next post), and that's exactly what we need to build more modules with it!

Burak Güner@handle.invalid

Soon™

Mike reposted

Michał Pierzchała

@thymikee.bsky.social

The best build is no build

It's 3am local time and I am reviewing a PR. What did just happen.

Astro is amazing. Everything just works. And it's fast!

Thanks for having me! It was fun! Super excited by Nitro Modules and the IO library! If you're building something that needs exceptionally fast operations on data, you should check it out!

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