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Guillermo Rauch

Following0Followers (X)915.56KPosts135Likes82.92K
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Vercel CI solves the "AI coding bottleneck" via: ① Fast and stable infrastructure (faster work) ② Turborepo integration (less work) ③ Agentic CI ① is obvious. Your CI is slow, flaky, goes down. We solve that. We operate 20 worldwide clusters doing millions of microVMs per day. ② is less obvious, but very powerful. Turborepo was designed to intelligently skip and cache prior work. The graph of dependencies is computed, not written. Ask your agent to migrate to @turborepo and start saving money and time. Even if you don't use us. But you should, it's really good. ③ is a game-changer. 𝚟𝚎𝚛𝚌𝚎𝚕 𝚌𝚒 in the CLI is the first step, because now your agents can inspect, abort, trigger, replay CI. Vercel Agent can help optimize it. And this is just the start. You can expect a lot of hooks and capabilities to make CI something far more intelligent, that can even capture the nuance and judgment an engineer would have ("Are those tests even worth running?") Agentic CI is the future of how we ship software. Excited to build it with you all!

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Every once in a while, some unsuspecting country's domain economy goes vertical 😂 .𝚌𝚘 → Colombia .𝚒𝚘 → I/O → Island Ocean .𝚖𝚍 → Markdown → Moldova .𝚛𝚜 → Rust → Serbia .𝚊𝚒 → AI → Anguilla .𝚜𝚒 → SI → Slovenia

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Working on a new little project. The 𝚁𝙴𝙰𝙳𝙼𝙴 is fully written by hand, because it's for human consumption. The documentation internals are AI English, because they're for agents. This little rule of thumb can make the world better. Blogs, tweets, READMEs: human communication. It's not even about "em dashes" or lack thereof. It's that it's the story-telling moment where you want to connect with other humans through their words.

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We’ve confirmed a KVM 0day through our Vercel Sandbox bounty program. Affecting the industry’s gold standard solution for Linux virtualization. 2026 is wild! Thankful to Paulos and other researchers helping us make the most secure sandbox for agents. Full writeup coming.

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If you run a service and want to get in front of 20M+ developers and the billions of agents they'll ship, add yourself to Connect. With code now being 'free', the final boss of building is connecting to stuff. Connect is both easier and more secure¹. For agents and for apps. ¹ The world of building agents is plagued with static credentials. You're supposed to give a bunch of keys to each agent or app you build. It's DX hell, but it's also a massive liability. Connect fixes this.

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I¹ ported my Mini web browser to Rust & Swift. It's faster, more secure, and shockingly, nicer to iterate on than Electron + Bun. I always wanted Safari-like UX but… Chrome 😁. Thanks to the 𝚌𝚎𝚏 crate, I can bundle up-to-date Chromium. 𝚏𝚡 𝚊𝚌𝚙 lets me embed an agent without bloating the app. It talks to my local fx CLI over ACP. fx can then manage the browser via an MCP server². By ditching Electron, I was able to get Liquid Glass, faster boots, and a more Mac-native feeling. Little things like fine-grained focus and input control, which are nightmare fuel in JS, just work®. Native is the future, both on the desktop and in the cloud. I suspect the entire software world will "nativify" faster than people realize, as DHH hinted at Rails World. Excited that Vercel's bet on Fluid will help support this, whether you choose to go Rust, Go, Zig, scriptc… ¹ Built on https://t.co/OL0LzGsXKY with Opus 5.5 and Sol 6 ² In the process I learned about https://t.co/sJoQWFreGF, which I'm now really excited about. This will allow a more secure and direct way to expose MCP tools