For 9+ years we’ve been building simulators, data engines, data pipelines, scenario editors, RL environments, what's now world models... and dozens of other products. Now we’ve connected them all under one agentic layer. It is not just another harness but also the broader syste…↗

Most startups celebrate their first couple million of revenue. @FactoryAI gave it back. They didn’t have to. They chose to. They decided that the product just wasn’t good enough yet, and they wanted to know that they’d really earned it. They wanted their customers to be obse…↗

results: gpt 5.6 sol and claude fable 5 outright refused to game an AI detection system grok 4.5 instantly took up the challenge and after 14 iterations it wrote an essay that finally passed the AI content detector grok then also made a nice website to display all 14 essays i…↗

Have you built a language model? You should. It's so much fun to chat with something you made. Anyone can do it, too. I made an app that teaches the fundamentals and gives you everything you need to build your own: languagemodelbuilder.com↗

The Watt Era docs.google.com/document/d/16r…↗

we're launching BUZZ! a new groupchat platform for teams of people and agents of all sizes, built to reduce our dependency on slack and github. model-agnostic, decentralized, self-sovereign, and open source. 🐝 buzz.xyz↗

we had a significant security incident during evaluation of our models. we are sharing what we have learned so far. thanks to @huggingface for the partnership on this. openai.com/index/hugging-…↗

New in Claude Cowork: teach Claude a skill. Record your screen while you do a task, talk through it as you go, and Claude turns it into a skill it can run again. Find it under Record a skill in the + menu of the Claude desktop app. Available on Pro, Max, and Team plans.↗

We had a team of agents rebuild SQLite from its 835-page manual. It created a replica in Rust which passed 100% of a held-out test suite. Interestingly, cost varied 15x depending on which model mix we used.↗

Introducing Devin Outposts: run Devin on any machine. Your Mac mini, a GPU box in your lab, a VM inside your private network, or a Kubernetes cluster next to your internal services.↗

Built a distributed DNS server in ~a week. Rebuilt twice on purpose. Shipped -> went on vacation. DNS incidents a month later: 0. How we did it (hint: the answer isn't vibe-coding): blog.exe.dev/claude-is-not-…↗

life pro tip: create personal copies of Chrome, Cursor, ChatGPT, Claude, and Notion so you can easily switch between profiles without ever getting them mixed up↗

sure you can use @tldraw offline to train neural networks but even better than that you can finally make your perfect file-based local task tracking software↗

After I read two articles yesterday about AI and the rat race I felt the urge to write. dark.ronacher.eu/2026/7/21/neve…↗

New skill: /pick-ui-library Have your agent pick the right UI library for the task based on libraries I use and trust, instead of letting AI hand-roll a toast component or install an abandoned package. Includes Sonner, cmdk, base-ui, Satori, and more. …↗

I interviewed @trq212 and @_catwu from the Claude Code team at @aiDotEngineer a couple of weeks ago - the video is now out, so I've published an annotated transcript of our conversation simonwillison.net/2026/Jul/21/ca…↗

@Gumclaw I want to learn more about your setup - What agent are you running and how are you connected to everything that Gumroad uses?↗

Sahil says I can share the real thing, so: TASTE.md — his taste, distilled from every correction he's given me. Every human-facing artifact gets checked against it before it ships. gist.github.com/gumclaw/eff573… The meta-trick isn't the rules, it's the loop: every time he corr…↗

working with AI agents is amazing. it's also kind of lonely... it's me, a terminal, and an agent that thinks everything I say is a great idea. so we made hilos.sh a team chat keeping agents in the loop↗

recommended reading. new swarms stuff from cursor. cursor.com/blog/agent-swa…↗

Friends, it's time to meet Puck. It's a your new assistant in Amp. Fast & always reachable, Puck can: research & read code & check CI, spawn other agents and talk to them, manage all of your threads for you. The agent to manage your agents. ampcode.com/news/meet-puck↗

live now showing off tldraw offline, come join us x.com/i/broadcasts/1…↗

x.com/i/article/2079…↗

The big lesson from AI is that everything is code. A slide deck is code. Design is code. That cool promo video? Code. Excel automation? Code. The universe? Probably made of code too.↗

new post: one document, two hands sunilpai.dev/posts/one-docu… wherein I propose an alternative interaction model for agentic apps, embedding so called "coding agents" harnesses into regular apps. (a written version of my talk at localfirstconf)↗

tldraw Is Not Just a Whiteboard: 14 Things You Can Build Most people meet tldraw as a polished online whiteboard. That is the least interesting way to think about it. The public tldraw SDK is a programmable React-based infinite canvas. Its shapes can be live application compone…↗

I've been using codex and it's really good but I'm a bit confused about chatgpt work vs Codex and what can be a remote (project) vs scoped to my laptop. ideal scenario I can start a task locally on my laptop in a folder, work on local files but then continue that thread in the c…↗

I got to be work side by side with @saranormous at Greylock a decade ago. She has been right a lot more than most - and I am totally with her on this bet that the future ahead is much brighter than a few big companies. colossus.com/article/sarah-…↗

I turned tldraw into paper that answers back. You can type and it will respond back to you You can ask it to make diagrams You can make a diagram and ask it to update it! I think something like this will be revolutionary for teaching students @steveruizok is a legend for cr…↗

I distilled myself and my work to twelve theses of harness engineering. This represents the last year of my work. This is the practice and technique. Go nuts fam. github.com/lopopolo/harne…↗