Jason Laster
@jasonlaster11
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Time traveling with @replayio, debugging the debugger, and devving the devtools. Say hello https://t.co/ncREttkhrF 👋
Oakland, CA
Joined June 2011
🚀 @replayio is live on @ProductHunt! You can now record, replay, pause, and inspect web applications with familiar developer tools. Share replays with friends and add replays to bug reports. 🔗 https://t.co/7HBFufzdLN 🐱
producthunt.com
🔴 Record your website in the Replay Browser ⠀ 🔍 Inspect the replay with familiar devtools ⠀ 👋 Share with friends and submit the best bug reports⠀ ⠀ ▶️ Replay captures all of the context needed to...
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I hope DX teams are bidding up the market for Josh.
I am looking for a full-time job. Being independent in open source for 3.5+ years has been wonderful. I've gotten done most of the high-level goals I wanted to, and miss having people & structure around me. If you know of a staff TypeScript+web developer role, let me know! 🙂
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What flags should i pass to `next build --turbopack` to get a trace? Asking because compile times are 16s and build times are 2mins. This is likely the result of slow db queries, which would be an easy fix if visualized.
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> With Codemaps, we are now exposing to humans some of the indexing and analysis we do inside of our coding agents The first line of the conclusion should have been the first line of the blog post. This symmetry between agents + humans is powerful. https://t.co/9KhxNigyxh
cognition.ai
Codemaps is meant to offer a shared understanding of a system between humans and AI, enabling your AI to teach you about the code you are looking at quickly and elegantly. A codemap can be generated...
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Can i set Vercel System Bypass Rules globally or in a per-project vercel.json? We have lots of small projects and it'd be nice if they all shared the same rules. https://t.co/yaw64tEaRY
vercel.com
Learn how to configure IP-based system bypass rules with the Vercel Web Application Firewall (WAF).
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Benchmark driven development
Cat's out of the bag. Cloudflare is ~3x faster for many workloads due to a series of fixes they've shipped in the last 5 days https://t.co/SnLpLzMUnX
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It’s a mistake to cancel 6.2GW of net new energy. https://t.co/cjisoEIduh
cnn.com
The Trump administration’s cancellation of the largest solar project in the United States has sparked confusion and concern among Republicans and Democrats alike.
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I love the attention to detail that Cursor is giving new UI elements like Plan Mode.
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We’re organizing https://t.co/0PsOl6Qt5z — a “conf” in loving memory of Mikeal. To contribute, please buy a ticket to join our fundraiser in SF, or make a donation. I’ll be auctioning off G coding classes to highest bidder 😁 Proceeds go to his family & 2 children, Kora & Kai.
an-event-mikeal-would-have-liked.com
Memorial charity event celebrating Mikeal Rogers' life - November 12, 2025
RIP Mikeal Rogers One of the earliest contributors to Node.js and overall great human being. He was a huge enabler of my work in https://t.co/KQPuGDuMKl and later became an advisor to @vercel. Always ahead of his time. Taken too young. https://t.co/bh5lX5uxlp
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love is attention: the transformer taught us something profound: attention is all you need. but maybe we knew this all along, just in a different language. when an LLM processes text, it doesn't read sequentially like we intuitively think. it attends – it looks at every token
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Deleting Next.js's middleware is the definition of reward hacking.
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Today we’re introducing GDPval, a new evaluation that measures AI on real-world, economically valuable tasks. Evals ground progress in evidence instead of speculation and help track how AI improves at the kind of work that matters most. https://t.co/uKPPDldVNS
openai.com
We’re introducing GDPval, a new evaluation that measures model performance on economically valuable, real-world tasks across 44 occupations.
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This is why I scroll Twitter
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The replies in this thread are eye opening. Most folks underestimate how insanely difficult it is to work on a runtime like bun.
half of bun’s team is here on visas. it’s already very difficult to find great engineers. please don’t make it harder
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In addition to shipping fairly significant features, I’m also impressed by how well it handles designing new UI components like button groups and types heads.
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I’m really enjoying Cursor’s background agents and web app. If it gets stuck, I can easily pull the branch down and finish it quickly. Once it catches up to the local IDE on rebasing, linting, and playwright tests it’ll be a force .
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When will we have <10s Vercel preview deployments? Asking because my team (codex) want to run the playwright suite.
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