Today we're open-sourcing `deepsec`: a security harness powered by coding agents. We've been testing it for a few months on our internal code bases as well as open-source applications from customers and partners. For the latter group we have privately shared the results, so iss…↗

Codex has overtaken Claude Code in downloads. TickerTrends shows the crossover on April 30, followed by accelerating share gains and a clear deceleration in Claude Code. Latest weekly: • Codex: 46.0M • Claude Code: 491K Gap widening. @sama @OpenAIDevs↗

HTML-in-canvas is now a first-class primitive in Remotion! It enables new types of effects that were impossible before.↗

just launched: proxyuser.com proxyuser is a synthetic user with a real browser testing out your core app functionality all day long so you sleep better at night. fully agentic signup! was bonkers to get working but it's such a nice way to use this type of product.↗

Sierra is raising $950 million from new and existing investors, led by Tiger Global and GV, at a valuation of over $15 billion. We now have more than $1 billion to invest in becoming the global standard for companies wanting to transform their customer experiences with AI.  We’v…↗

Announcing Cofounder 2: Run an entire company with agents. It's the infrastructure for the one person billion dollar company - orchestrating agents across engineering, sales, marketing, ops, and design. (and yes that's my real grandma in the video)↗

Fuck I think I've figured out good creative writing with AI It's really fun↗

Introducing Flue — The First Agent Harness Framework Flue is a TypeScript framework for building the next generation of agents, designed around a built-in agent harness. Flue is like Claude Code, but 100% headless and programmable. There's no baked in assumption like requiring…↗

Pets. Now in Codex. Use /pet to wake your pet.↗

Bring your workflow to Codex in just a few clicks. Import settings, plugins, agents, project configuration, and more so you can keep working with fewer interruptions. Your move.↗

I built a system called Sheet Advisor and I'm open-sourcing it today. The idea: you bring an investment thesis, Claude helps you turn it into an actual strategy with specific positions and rationale for each. Then it watches your portfolio every day. And because it knows why you…↗

just shipped web ui bench! measuring taste is hard, so i gave 20 models the same ui component prompts and put every output side by side so you can compare them yourself. let me know which you think is best! built with cursor sdk webuibench.dev↗

it's still experimental so we hide it a bit, but in the codex app, try: > what have i been doing very inefficiently on my computer (according to Chronicle). make some recommendations. be direct. tell me what i need to hear.↗

AI helps you move faster, but it just accelerates software entropy. Here's how to de-slop a codebase ruined by AI, with one skill:↗

Agents make ugly UIs because they've never seen good design. We've been fixing that, 2,000 DESIGN.md files from the world's best products, structured for a model to read and learn. Colors, type, spacing, layouts and more. Free. styles.refero.design↗

Suddenly feeling the urge to copy your repo somewhere new? @EntireHQ is open sourcing our latest project today: git-sync. Most git migration tools assume you’ll make a local mirror clone, fetch everything down, then push it back up somewhere else. Instead, git-sync mirrors refs…↗

Codex for everything: - Dynamic UI for the task at hand - 20% faster computer & browser use - Even better slides and sheets - Annotate in browser, artifacts, and code - Easier to get started - Cleaner design across the app - Performance improvements - (no clunky handoff/switchin…↗

We’re introducing a new model benchmark. And it’s a different kind of benchmark. (Basemark? Vibench?) A different kind because it’s breathing, constantly updated from millions of builders. Not a closed set of tasks. For a while now the public benchmark have not been really use…↗

Introducing Cloud Computer for Manus. Your always on machine in the cloud, so anything you build keeps running 24/7, even when your laptop is off. Anyone can build, and anything can run. Available on web and mobile↗

Now available for ChatGPT accounts: Advanced Account Security, a new opt-in setting for people at higher risk of digital attacks, with stronger protections including phishing-resistant sign-in and more secure account recovery. openai.com/index/advanced…↗

Claude Security is now in public beta for Claude Enterprise customers. Claude scans your codebase for vulnerabilities, validates each finding to cut false positives, and suggests patches you can review and approve.↗

A costume called conviction Mosty VCs today describe themselves as conviction investors. And they are, as long as the founder is working on AI, went to an Ivy League school, spent the prior decade leading teams at a unicorn, or exited their last business for $500m. The word has…↗

Ridiculous product unlock: Take screenshots of your UI and paste them into ChatGPT. Then paste in the PRD you just wrote for a new feature. Ask it to mock up the new feature.↗

1. should you move to us? and why 2. what swedish ecosystem can do? listen to the full 18 min speech of @paulg at @ycombinator visit to stockholm in apr 2026↗

introducing trunks: the most powerful open-source git-native filesystem for ai agents. it gives agents a normal filesystem with git semantics built in: branches, diffs, rollback, checkpoints, and push/pull. available today. completely self-hosted. open source. your data stays…↗

We’re talking about Goblins. openai.com/index/where-th…↗

Fragments: updated guide on AI coding, video on harness engineering, how long should a function be, the problems of Software Brain and why AI is unpopular martinfowler.com/fragments/2026…↗

I've been building with the cursor SDK for a few days now. It's awesome. 🧵 I embedded a cursor agent directly inside Gmail:↗

I’m soooo pumped, we just announced @stripe Console, an agent that can analyze your business, find ways to grow, and even take action on your behalf (like launching payment method experiments to increase conversion). Join the waitlist here: docs.stripe.com/dashboard/cons… This…↗

Today, we're announcing multi-disk Serverless Execution. This allows you to build agents that have access to a bash tool (with Python, Node, and more) that can compose data from different file systems, in a directory structure that you specify. This simplifies how teams building…↗