@ccheever.com on 🦋/ working on @expo & @castlexyz

Joined April 2007
83 Photos and videos
Charlie Cheever retweeted
It’s funny, motocross at the White House is, like, fine with me. But here’s an example of something that is genuinely unforgivable but that a lot of people seem to have moved right past.
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Charlie Cheever retweeted
Did our marketing team just sneak an announcement of the EAS mobile app into this image? 👀
Jun 13
The fastest mobile build is the one you never run. Most CI/CD reruns a full iOS build even when you only touched JavaScript. EAS Workflows knows when not to build. So we compared the top mobile CI/CD tools for 2026. Expo's biased, but we kept it honest. ↓
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Charlie Cheever retweeted
Jun 12
Expoへようこそ!🇯🇵
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Charlie Cheever retweeted
Replying to @kzzzf @swmansion
React Native and @expo are the best way to build apps with AI, and if you want to know why, @ccheever's keynote from this year's App.js Conf is a must-watch: youtube.com/watch?v=605Id2fh…
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Charlie Cheever retweeted
This is tomorrow! Sneak peek of the deck I'll be sharing:
I will be doing a virtual talk this Friday on my vibe coding process. As a non-technical person who has somehow managed to get 30k stars on GitHub, I will be sharing the behind-the-scenes of how I get product ideas, how I work with coding agents, how to design stuff that's not AI slop, and why I think code is a medium for storytelling. RSVP here luma.com/n77w0jwq (Use the code PREMIUMPASS under "Add a coupon" to access the event for free) (Thanks to @sariazout and the @wwwsublimeapp community for hosting)
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Charlie Cheever retweeted
I will be doing a virtual talk this Friday on my vibe coding process. As a non-technical person who has somehow managed to get 30k stars on GitHub, I will be sharing the behind-the-scenes of how I get product ideas, how I work with coding agents, how to design stuff that's not AI slop, and why I think code is a medium for storytelling. RSVP here luma.com/n77w0jwq (Use the code PREMIUMPASS under "Add a coupon" to access the event for free) (Thanks to @sariazout and the @wwwsublimeapp community for hosting)
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Charlie Cheever retweeted
Nipple-Gate: How it was more important to protect Trump at all costs than it was for the DOJ and FBI to investigate Epstein's crimes against women and children. open.substack.com/pub/jkbjou…
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Charlie Cheever retweeted
This is why real democracies have that pesky thing known as due process.
One top military officer provided a plausible explanation, behind closed doors on Capitol Hill, The Intercept has learned. In the briefing, a high-ranking officer on the Pentagon’s Joint Staff stated that some of the people killed by the U.S. military may have been the victims of human trafficking.
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Charlie Cheever retweeted
The Paris of Appalachia.
There are 22 metro areas with over a million people along the edges of this region; there is 1 (Pittsburgh) contained entirely within it.
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cool
Today we're introducing Wave. A proactive product agent that helps teams build self-improving products. Every product team runs the same loop. Build, ship, use, learn. AI has made building and shipping extraordinarily fast. Understanding usage and learning still happen by hand. Wave runs the whole loop: - Analyzes your Amplitude data for signals across analytics, feedback, session replays, error logs, agent traces, and experiment results - Surfaces opportunities in the form of full product specs that you or your agents can approve and ship - Tracks the experiments and outcomes of what you've built so you can start the loop over again Your product learns what works and gets smarter every cycle: amplitude.com/wave
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Charlie Cheever retweeted
If you've adopted AI at your company but haven't seen any tangible results, read this 1990 article: "The Dynamo and the Computer" by Paul David. When electricity first arrived, factories that "adopted" it barely got faster. They just swapped the steam engine for an electric one and ran everything else exactly as before: same machine layout, same workflow, same management. Electricity in, no real gains out. The most common mistake with any new technology is to drop it into the old organization and then declare the transformation done. The real leap came decades later, when each machine got its own small motor. Suddenly machines no longer had to be lined up around one central drive shaft. They could be rearranged around the actual flow of work. The productivity gains didn't come from electricity. They came from REDESIGNING THE ENTIRE FACTORY around it. AI is the same. Bolting it onto your existing process gets you a faster steam engine. The payoff comes when you redesign the work itself. (link to paper in comments)
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Charlie Cheever retweeted
After my @appjsconf talk, I did a small encore: a reminder that moments of fun and playfulness never fail to become the most important ones.
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Charlie Cheever retweeted
We're not done yet. Trust me, SDK 57 is going to hurt 🚀
Jun 8
Your native modules got 2x faster in SDK 56 with no code changes required. Full numbers in the blog post: try.expo.dev/jsi-twitter
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Who needs Wilt when you have team chemistry
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Charlie Cheever retweeted
Replying to @realJeremyCarl
As someone who's funding these founders, I can tell you why your numbers are bogus. A higher proportion of the first group immigrate in order to start startups. Obviously people who immigrate *for the purpose of starting a startup* are going to start startups at higher rates.
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Charlie Cheever retweeted
This is so insanely corrupt, I can’t even believe it. More than half the donors to Trump’s $400 million White House ballroom just won over $50 billion in new federal contracts in six months. And here’s the part that should make your blood boil. Sixteen of these 27 donors were facing federal enforcement actions, antitrust reviews, labor cases, securities charges. Many of those cases have been quietly dropped or scaled back since Trump took office. You write a check, your legal problems disappear. That’s not a coincidence. The White House won’t even release the full donor list. They’re hiding it on purpose, because daylight is the one thing pay-to-play can’t survive. A federal judge already ruled ballroom construction has to stop until Congress authorizes it. Government is supposed to serve the people, not auction itself off to the highest bidder. When access goes to whoever pays the most, working families always end up paying the price. We either end the corruption, or the corruption will end us. wapo.st/3QmJjSz
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Charlie Cheever retweeted
Two years of wanting to do this rewrite, two months of doing it. The Objective-C layer was a ceiling on what was possible in Expo Modules. That ceiling is gone now, and this rewrite is the platform for what we're building next. More on top of this is coming 👀🚀
Jun 4
Swift now talks to JSI directly. The Objective-C middle layer is gone. In Expo SDK 56 we rewrote the native module infrastructure on Apple platforms. Calls are faster and the stack is simpler. The seam that used to make debugging miserable is gone too. Here's how 🧵
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Charlie Cheever retweeted
Just started @callstackio x @expo AI meetup in SF
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Charlie Cheever retweeted
Jun 4
Swift now talks to JSI directly. The Objective-C middle layer is gone. In Expo SDK 56 we rewrote the native module infrastructure on Apple platforms. Calls are faster and the stack is simpler. The seam that used to make debugging miserable is gone too. Here's how 🧵
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