Jimmy Lai
@feedthejim
codex/chatgpt web infra EM @openai
previously: eng director @nextjs @vercel, also @reactnative @meta
535 Following 9.2K Followers
btw, am now leading ChatGPT/Codex Web + Desktop infra group
if you’ve already made other developers meaningfully faster (platform, tooling, reliability, DX), the opportunity is to do the same work at AGI scale
hit me up if interested
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it wouldn't be far-fetched to say that for OSS js maintainers, a fully functional and cost-efficient slop fork of Typescript is the equivalent of Navier-Stokes being solved for mathematicians
a year ago, this idea would have been laughed at
where do we go from here?
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sad that people learning how to build software today will never experience the enraging - but satisfying -experience of spending your week-end on a bug that was caused by a dumb typo
there's a lot of cool stuff being announced for devday but the real game-changer has been ultrafast for me
8x faster outputs is genuinely mind-blowing once you try it. it's a good taste of the future
Announcing dots. Dots work 24/7 for you, learn from your feedback, have their own computer, browser and can be connected to over 4k apps in our ecosystem.
They’re powered by Astra our best model yet. Included in your Pro plan, without drawing down on any of your usage. You can even call a dot while it’s working.
We’re getting you started with your primary dot today and soon you’ll be able to create entire teams of them.
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what's fascinated me since joining mid-sprint: making great products hasn't changed. you still can't prompt your way to something nice.
you need internal feedback rounds, rigorous metrics analysis, and good instincts.
models just make our feedback loops exponentially faster.
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Can't wait for DevDay next Tuesday.
Some really fun stuff, but also many many things that should change the way you work. It's been our most ambitious sprint and Astra has really made new things possible in such short amounts of time.
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it's such a pleasure doing browser perf investigations with Astra.
Chrome always had incredible perf tooling - you just had to get past the horrible DX to get anywhere. if you've ever investigated memory leaks, you know.
Astra and Codex make that a breeze.
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onboarding with codex is kinda fun
this is basically how the onboarding session for dev goes at oai lol: “just setup computer use, and paste this prompt to set up your entire (personalized) env”
they also do a great job at making info available to codex… stuff like “how do I solve a millenium problem on day 1” is very easy to do
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at the airport rn and I love the fact that I can leave my laptop at home when going on vacation thanks to codex’s remote sessions + computer use
added a little "magic" to the pictures on my website
click around
this release was my last as Head of Next.js 🫡 so excited for people to get their hands on it.
looking for a reason to upgrade? 16.3 includes performance improvements at *every* layer of Next.js.
out of the box, both local and production DX should feel materially faster. and if you’re ready to try Cache Components, you now have the best tools to guarantee instant navigations across your sites.
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Next.js 16.3 is now available!
• Up to 90% less memory in dev
• Faster builds, type checking, and rendering
• Better tooling for AI agents
• Custom error boundaries
• Instant Navigations for SPA-like responsiveness
Here's what's new ↓
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Next.js 16.3 is now available!
• Up to 90% less memory in dev
• Faster builds, type checking, and rendering
• Better tooling for AI agents
• Custom error boundaries
• Instant Navigations for SPA-like responsiveness
Here's what's new ↓
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This is the right level of tying your identity to open source.
We've been testing GPT-5.6-Sol for over 2 months now. It’s incredibly good in my day-to-day working on Next.js.
It understands architecture tradeoffs. It can investigate complicated Next.js issue reports. It considers other areas of the codebase when fixing bugs. Needs very little guidance. Short prompts are enough.
There’s some big refactors of the Next.js server that it implemented end-to-end with me pointing at high level possible improvements (we have skills for how to grab our failing test suites on PRs, deployment tests, etc.)
Those PRs are ready to merge after Next.js 16.3 has been released.
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babe wake up new lie detector technology just dropped
We’re sharing the next major milestone in our non-invasive brain-to-text decoder research: Brain2Qwerty v2.
Building on v1, which was published today in @Nature, Brain2Qwerty v2 is the highest-performing end-to-end pipeline capable of real-time sentence decoding from raw brain signals. It advances beyond character-level performance to decoding words and semantics, enabling accuracy for overall communication.
We believe this research has the potential to make a real difference for the millions of people who suffer from brain lesions or disorders that prevent them from communicating.
🧵👇
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Next.js 16.3 Preview: Instant Navigations
A new suite of tools that brings the responsiveness of client-driven SPAs to Next.js, without giving up what Server Components do best. The speed of the server, with the feel of the client.
Try it and tell us what you think ↓
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I’ve been dumping on OpenAI with low effort meme tweets that get too many views, but Codex is the best DevX acceleration product of all time and I wrote about it here:
no big conf this year for Next.js!
we're trying something different... more frequent, intimate, community-centered nights where you can meet and chat more easily with the Next.js/React teams
Next.js Conf is cool, we just want to see you more often 😀
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