What’s something you have a very strong opinion on as a software engineer/dev?

What timeline are we on man. There’s a $60 million UFC cage on the White House lawn for the president’s 80th birthday. 125,000 guests. 494 port-a-potties. He compared it to the Eiffel Tower and said maybe they’ll never take it down. The world’s first trillionaire was minted yesterday. SpaceX IPO. One person now holds more wealth than the GDP of most countries. The government is negotiating to own a piece of OpenAI. The CEO walked into the White House and pitched it himself. They’re calling it a Public Wealth Fund. That same government killed OpenAI’s biggest competitor’s models on a Friday night. The reason? A verbal jailbreak claim from an unnamed company. The same jailbreak works on OpenAI’s models. Nobody touched them. The competitor got blacklisted by the Pentagon four months ago. Their crime? Refusing to let the military use their AI for mass surveillance of American citizens. A judge called it retaliation. The Pentagon did it anyway. Both AI companies filed to go public in the same two-week window. Both targeting trillion-dollar valuations. One has a government equity deal in progress. The other can’t keep its products online. The engineers who built the banned models can’t use them anymore. Because of their passports. And an AI company that spent thousands of hours cooperating with government safety testing got punished harder than any company that didn’t bother. UFC on the White House lawn. A trillionaire. Government-owned AI. Export controls based on phone calls. Cage fights and trillion-dollar IPOs in the same news cycle. Watch the film titled Idiocracy. That’s the timeline we’re on.

FABLE 5 & MYTHOS TO BE DISABLED WORLDWIDE EFFECTIVE IMMEDITELY US gov export controls force Anthropic to disable Fable 5 & Mythos 5 for everyone worldwide. "This is a misunderstanding," they say. So... is AGI here?

Boris Cherny: "Overnight sub-agents do deeper work" 10-step Fable 5 setup you can copy this week: 1. Write CLAUDE.md - stack - commands - code style - forbidden files - review rules 2. Add PROJECT_MEMORY.md - verified facts - failed attempts - last session - next run 3. Create 1 Skill per repeated workflow - CI triage - PR review - design QA - deploy check 4. Add eval cases Put them in: eval/<workflow>.jsonl 5. Split maker and verifier Maker writes the chang Verifier runs the app, tests, screenshots, logs 6. Use worktrees for parallel runs No shared checkout No file collisions No mystery edits 7. Send work by price Fable 5 plans across days Sonnet 4.6 does bulk edits Haiku 4.5 grades Opus 4.8 handles fallback cases 8. Put UI work behind screenshots If the task is visual, text logs aren't enough 9. Move long jobs to Routines CI failed? Run triage PR opened? Run review 7am? Send digest 10. End every run by writing the lesson back A fix that stays in chat dies there The rule: > Builder makes the change > Verifier checks the real artifact > Memory keeps the receipt > You read the diff Skip the verifier and you don't have an agent system You have a very confident intern with shell access

Been testing Odysseus, the open-source AI workspace released by PewDiePie. → Chat with local or API models → Run AI agents → Deep research workflows → Memory that persists across sessions → Notes, documents, tasks, email & calendar → Hardware-aware model recommendations it runs on your own hardware and keeps your data under your control makes it even more interesting. pretty cool stuff.

Perks of letting your husband host a fight club in the garage gym every night (BJJ) ➡️ someone had a soccer jersey for me to borrow so I could do the buy one get one at Chipotle. Do I watch soccer? No. Do I have pregnancy cravings? Yes 😭

You are not paying for AI. You are being subsidized. $200/month Claude Max 20x gets you up to $8,000/month in API compute. That's 40x what you pay. $200/month ChatGPT Pro 20x gets you up to $14,000/month. 70x what you pay. Anthropic and OpenAI are lighting billions on fire to win developers. This is not scalable. The rate limit "adjustments" we keep seeing are the rugpull starting in slow motion. Enjoy it while it lasts.

Fable NPC system is so sophisticated the devs are calling it a "life simulator" You build reputation through your actions in the game, then each NPC has a different opinion of you based on your reputation. You might have to become a rich business owner to impress and date one of the NPCs in the game, but another NPC will hate you for being so rich. As a consequence, that NPC could increase the prices on their merchandise when you visit their store. Even small actions such as giving money to the homeless or evicting people out of their houses will impact your reputation, and this can be done at a very large scale, because you could: - Buy every home in the world of Fable - Evict everyone out of their homes - Have every NPC now live on the street Possibilities are quite literally endless here

Anthropic and OpenAI are both telling engineers to write loops. Not prompts. Not agents. Loops. That is not a coincidence. When the two most important AI labs on the planet independently converge on the same pattern — that is a signal worth paying attention to. Most engineers are still thinking in terms of single calls. Input → model → output. The engineers winning in 2026 think in cycles. Output becomes input. The model evaluates its own work. The loop runs until the result is right. This is the complete breakdown of what loops are, why they matter, and how to build them ↓

We've reset 5-hour and weekly rate limits for all users. Enjoy Fable 5!

Introducing Claude Fable 5: a Mythos-class model that we’ve made safe for general use. Its capabilities exceed those of any model we’ve ever made generally available.

Just felt my first Florida earthquake….what in the world

We've doubled usage limits in Claude Cowork for the next month. Delegate bigger, more complex tasks to Claude.

⚠️ New "IronWorm" supply-chain attack: 30 npm packages from @ asteroiddao shipped a malicious Rust binary firing on preinstall. It sweeps 86 env vars 20 credential files (AWS, GCP, Vault, npm, plus AI keys like Anthropic & OpenAI), hits Exodus wallets, hides behind an eBPF rootkit, and beacons over Tor. Self-propagates via npm Trusted Publishing OIDC, with backdated commits faked as claude/dependabot/renovate.

GITHUB JUST CREATED AN OFFICIAL CERTIFICATION FOR THE MOST IN-DEMAND DEVELOPER ROLE OF 2026. It is called Agentic AI Developer. GH-600. And it is the first formal signal that running AI agent teams is now a recognized engineering discipline with a credential behind it. Not a prompt engineer. Not a vibe coder. An Agentic AI Developer. The person who operates, supervises, and integrates AI agents across the entire software development lifecycle. The person who knows where agents fail in production. The person who understands how to build autonomous workflows that do not introduce catastrophic failure modes into CI/CD pipelines. The person every engineering team is going to need and almost none of them have right now. GitHub certifying this role changes the hiring conversation permanently. Before GH-600: "Do you work with AI agents?" is an interview question with no standard answer. After GH-600: the credential tells the hiring manager exactly what you know and what you can do before the interview starts. The engineers who get certified in the first wave of GH-600 will have a credential for a role that has more demand than supply for the next 3 to 5 years. The engineers who wait until it is mainstream will be competing with everyone who moved first. If you are already working with GitHub Copilot or building agent-driven workflows you are already doing this job. GH-600 is how you prove it. Bookmark this. Follow @cyrilXBT for every AI certification worth your time the moment it drops.

Claude Code creator: "I don't prompt Claude anymore. I write loops - and the loops do the work. My job is to write loops." in 30 minutes Boris reveals his actual daily Claude Code setup. Claude Code loops dynamic workflow Worth more than a $500 vibe-coding course

We've changed the trigger word from "workflow" to "ultracode". You can still say "use a workflow for this", but when you're clearly referring to something else, Claude won't kick off a dynamic workflow. For an explicit trigger, use "ultracode". We appreciate the feedback!

How do we automate business analytics with Claude? New blog post covering our best practices for skills, data foundations, and evaluations when building agents to perform data analysis: claude.com/blog/how-anthropi…

Introducing 30 days of AI. For the next 30 weekdays, I’m going to share one observation per day from the frontlines of AI. I have the privilege of co-running an enterprise AI transformation firm, where I experience the edges of this technology, see the biggest challenges the biggest companies are facing, and have deep relationships with companies on the frontier (Anthropic, OpenAI, Lovable, Cursor, Perplexity, Vercel). I get to live in the future for free, and I want to bring that future to those trying to disrupt themselves before they get disrupted. There’s just two rules: 1) Each observation is actionable & understandable to the non-technical leader. 2) I can’t miss a day. Post 1 coming soon.