Data Scientist @ Sequoia. Boring dad stuff. Soli Deo Gloria
NC, USA
Joined May 2008
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William Cox retweeted
Someone rewrote Kafka in Rust and embedded it in Postgres using pgrx 🤯
Kafgres is a Rust-based Kafka broker that runs within Postgres. Kafka clients connect to Postgres on port 9092 and literally can't tell the difference. 🧵
William Cox retweeted
The jobs apocalypse is postponed. An AI jobs boom is here
According to @TheEconomist, AI is actually proving to be a net job creator in the US, easily generating over 1M new positions (from data center construction to AI engineering) to offset back-office layoffs.
While routine admin and customer service roles face real disruption, the overall labor market is proving resilient.
economist.com/finance-and-ec…
William Cox retweeted
we got hit with a crazy scam attempt
someone signed up for our inference and did a video call with our sales person confirming intent to spend $400,000 over the next year and asked for increased rate limits
our sales person felt like something was off so he looked up the company - found a bunch of videos of the CEO and it looked and sounded like the same person he talked to
so he figured it was real but we started looking deeper
the email they had been talking to us from was a lookalike domain that was registered 4 days ago. all the traffic they were sending looked bizarre and came from foreign IPs
emailed them for more info to see what they'd say. of course they hit us with the "i'm about to get on a plane, can't do anything right now, please move forward"
messaged the real CEO on instagram and yeah he had no idea what we were talking about, the scammer was deepfaking him
be careful out there, things are getting crazy
William Cox retweeted
I’m excited to finally announce the newest edition my Stanford course 𝗧𝗵𝗲 𝗠𝗼𝗱𝗲𝗿𝗻 𝗦𝗼𝗳𝘁𝘄𝗮𝗿𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿. It has been 9 months in the making.
Last November, with the release of Claude Opus 4.5, coding agents experienced a step function improvement in capability. We all felt it. The LLMs were more powerful, could reason for longer, solve harder tasks.
This year’s iteration of my course reflects the 2026 metamorphosis of software engineering.
My core belief is simple: AI-native developers of the LLM era are going to become the most important members of any software organization. I have designed my course to train this next generation of engineers.
𝗪𝗵𝗮𝘁’𝘀 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁 𝘁𝗵𝗶𝘀 𝘁𝗶𝗺𝗲 𝗮𝗿𝗼𝘂𝗻𝗱
First, 85% of my Fall 2025 class material is being thrown out. The Fall 2026 syllabus reflects the core capabilities AI-native engineers must have: agent skills, advanced context engineering, MCP portals, agent-ready codebase principles, agentic code review, security, parallelizing background agents, software factories, and more.
Second, I am going to teach my students how to have software taste. Every student will be required to ship pull requests to production-grade, real-world codebases. The course is collaborating with the top open-source AI repos who will offer support and mentorship to students on how to meaningfully contribute to their projects.
This has never been done before in any university course so I am incredibly grateful to our OSS Partners: @browserbase, @HeyGen, @CopilotKit, @semgrep, @OpenHandsDev, @milvusio, @marimo_io, Pi, @crewAIInc, @warpdotdev, @vercel, @cmux, @arizeai, @UnslothAI, and @anyscalecompute.
𝗪𝗵𝗮𝘁’𝘀 𝘀𝘁𝗮𝘆𝗶𝗻𝗴 𝘁𝗵𝗲 𝘀𝗮𝗺𝗲
I’m fortunate to again have AI software engineering leaders and founders as guest speakers to share their learnings from building top coding agent products. Thank you to @leerob from @cursor_ai, @bcherny of @claudeai code, @EnoReyes of @FactoryAI, @silasalberti of @cognition, @0xine of @semgrep, Rajesh Bhatia of @Cloudflare , @amasad of @Replit, and @eladgil.
All resources will be available online. All classes will be available to the public.
9/22 on Stanford campus. See you in class.
themodernsoftware.dev/
William Cox retweeted
wtf！？视频拍完以后，居然还能重新选机位。
早上写过李飞飞 World Labs 新发布的世界模型 Atlas，这个是刚放出来的一个具体玩法。
现场只用 3-5 台普通手机/运动相机，从几个角度拍下砸西瓜的过程。
Atlas 会先理解并重建这个动态场景，然后直接冻结时间，把虚拟摄影机移动到现实里根本没有摄像头的位置，重新渲染出新的镜头。
相当于几台手机，就能做以前需要一整套多机位阵列才能完成的 Bullet Time。
我觉得这个 Demo 特别能说明世界模型和普通视频模型的区别：
普通视频模型是在生成一段视频，世界模型是在重建这段视频背后的世界。
以后可能真的是先把事情拍下来，至于摄影机到底放哪，回去再决定。
太夸张了这个效果🤯
William Cox retweeted
This might be the most beautiful thing I've read in my life. What a privilege to be alive in 2026.
ordinaryabundance.com
William Cox retweeted
Made a quick survey about the economics of AI: next-five-years.vercel.app.
William Cox retweeted
You wake up
Your husband looks young, the same mustache he used to have over twenty years ago
There are voices in the kitchen
You sit and listen, you can make out one, two… three, three little voices all the way in the kitchen
There is the smell of pancakes in the air, along with some bacon, you are hungry
You look down, your hands, so young
As soon as you walk into the kitchen little voices all cry out your name “mama, mama!!” Hugs filled the air along with sticky syrup hands, but you do not care
By the sink there he stands, your husband
Tall, full head of blonde hair, and you cannot help but hug him. His body feels so strong, filled with youth, you take his smell in, and you stand there taking in the warmth, listening to the children arguing over who gets the last piece of bacon, watching their little feet run across the kitchen floor, memorizing everything, because this ordinary so unimportant Saturday is what you wish you could go back to the most
And then you wake up, life has gone by, you are old, the house is empty, the children are grown, your body aches
And you finally know, you finally understand that at the end of life you will not wish to have had more promotions, to have gone back for one more day of work, to of had more time to clean the house, for one more day of school, for errands, for anything else besides a slow Saturday morning where the air smells like pancakes, and the house is filled with little voices, and you are woken up to the small bodies and the smell of the little heads you love most in the entire world.
An extraordinary life is made up of ordinary days. Of a summer breeze, and small hands, of cold cheeks you kiss in the autumn afternoons, of a steady hand that holds yours, of the wonderful miracle that is having everyone you love, all with you under the same roof.
This quoted post is unavailable.
William Cox retweeted
I made a free little tool to help you which if your
computer's microphones are best.
Record 20 seconds of audio and get an immediate analysis of all the input devices.
Your recordings never leave your computer!
William Cox retweeted
I don't think the crux of the disagreement is about the cognitive capabilities of AI models, narrowly defined. Here's my write-up of how I see the crux of the disagreement with the broad "singularist" worldview. understandingai.org/p/why-im…
William Cox retweeted
I was clearly wrong about Anthropic. They are obviously currently the leader in AI. No company has released a model as good as Mythos/Fable and they will undoubtedly have Mythos 2 ready soon.
And I would never cut them off in a way that hurt them badly, even as a competitor. That’s not my style.
Tesla open sourced its patents and we made the Supercharger network available to all competitors, even though we could have made it a walled garden.
SpaceX launches competing satellite systems with no increase in price or use of unfair terms.
Even my worst enemies can attack me on this platform.
…
William Cox retweeted
The next evolution of Hermes Agent is here!
Introducing Hermes Desktop: everything you love about Hermes, now native on your machine.
First demoed in Jensen's GTC keynote, it's now in public preview.
William Cox retweeted
You can build interactive applications with gpt-realtime-1.5, so users can control app state more naturally with voice.
Hi Chappy 👋
William Cox retweeted
Click up is not the only multibillion dollar funded AI company exposing your data. Fireflies.ai allows anyone with an unauthenticated request download the FULL Call audio and video + including emails to every participant and an AI summary of your private meeting.
Below is a Disney meeting Call summary and how they're deciding to improve or fire the janitors who leave dirty toilets. That's just a small segment of the meeting.
i went to clickup.com. opened the page source. found a hardcoded API key in the javascript. copied it. sent one GET request.
got back 959 email addresses and 3,165 internal feature flags.
employees from Home Depot. Fortinet. Autodesk. Tenable. Rakuten. Mayo Clinic. Permira. Akin Gump. government workers from Wyoming, Arkansas, North Carolina, Montana, Queensland Australia, and New Zealand. a Microsoft contractor. 71 clickup employees.
fortinet sells enterprise firewalls. tenable makes Nessus, the vulnerability scanner half the industry runs. their employees emails are exposed because clickup hardcoded a third party API key in a javascript file that loads before you even log in.
this was first reported to clickup through hackerone on January 17, 2025. its now April 2026. the key has not been rotated. i just pulled the response five minutes ago. every email is still there.
clickup raised $535 million at a $4 billion valuation. claims 85% of the Fortune 500 use their platform. looks like the proof is in the page source.
William Cox retweeted
Did you see this piece by @dbreunig? He argues that the cost of locking down software through LLM analysis makes open source MORE valuable now: dbreunig.com/2026/04/14/cybe…
William Cox retweeted
Today, we're introducing Spectre I, the first smart device to stop unwanted audio recordings.
We live in a world of always-on listening devices.
Smart devices and AI dominate our world in business and private conversations.
With Deveillance, you will @be_inaudible.
