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Economist at George Mason University. Writes Overcoming Bias on prediction markets, signalling and the far future, and wrote The Age of Em and The Elephant in the Brain.

• Don’t forget to talk like a pirate today

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Mac and iOS developer at the Iconfactory, where he has worked on apps including Twitterrific and Tot. He writes about development at furbo.org.

• Pulling up a keyboard on a closed Duo is likely to be a surprise: don’t forget to check it.

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Writer on learning and skill acquisition; author of Ultralearning and Get Better at Anything, known for the MIT Challenge and the Year Without English.

• New Article: How to stop forgetting what you read https://t.co/5oGObe4srl Why do we forget so much of what we read? I think the answer is less about finding the perfect note-taking system and more about building a larger base of knowledge.

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Singaporean writer and author of FRIENDLY AMBITIOUS NERD; blogs at visakanv.com about ambition, writing and thinking in public.

• good news: I’m still available for marketing consults (see pinned tweet)
  Quoting@pmituterrible news: Marketing (even with the use of AI) is still super hard

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Bulgarian-born writer and founder of The Marginalian (formerly Brain Pickings), a reader-funded blog on books, science, art and philosophy running since 2006.

• The Measure of a Life Well Lived: Henry Miller on How to Grow Old and the Secret of Remaining Young at Heart

  "If you can fall in love again and again ... if you can forgive as well as forget, if you can keep from growing sour, surly, bitter and cynical, man you've got it half licked."

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Working on @ampcode. Writing registerspill.thorstenball.com. Once authored interpreterbook.com and compilerbook.com.

• Time to leave one `amp --no-tui` running on your Mac mini and forget about it. It now serves every repo on the machine, and keeps itself updated.

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Geneticist and writer on human population genetics, deep history and evolution; author of the Unsupervised Learning newsletter.

• this sort of tweet is fine. i have the same concerns
  Quoting@BlakeSNeffI think this is one of the most important facts to be aware of in the debate over Indian immigration: Even relative to other Asian immigrants, Indian Americans are on average very liberal, not just in terms of voting Democrat but also holding particularly left-wing views on specific issues. Indian…

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• so what should i do about it? not tweet about genetics? 🤷🏾‍♂️
  Quoting@ProfBootyPhD@razibkhan "As usual when i get surfaced in some parts of X" - you are too generous to your followers (understandably). Almost every time you post about anthropology and genetics, the same people are there to slurp up every factoid that might support white superiority.

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Writes Hyperdimensional, a newsletter on AI policy and governance. A White House AI policy adviser in 2025; joined OpenAI on 6 July 2026 to lead its Strategic Futures team.

• op deleted his tweet (thanks I guess) but I get a ton of questions about why I sometimes limit replies, and if you’d like to know the answer you can look below.
  Quoting@deanwball@sponkostonko I limit my replies when it occurs to me to do so to make it slightly harder for people to threaten me and my family with violence, which happens frequently in my life now. It still happens, but at least with replies limited my wife is less likely to see it.

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Co-creator of Django and creator of Datasette; writes daily at simonwillison.net.

• The contagion of fear

  Bryan Cantrill responds to the tweet by former Anthropic employee Jacob Coxon confirming that many Anthropic researchers believe AI "could kill us all by the end of the decade". Bryan shares a story of his own youthful…

  AnthropicRelated

Economist and journalist; Financial Times columnist as The Undercover Economist, author of How to Make the World Add Up, and presenter of the Cautionary Tales podcast.

• My tweet was less about how to do the task, and more about what happens when I tried to use a well-established tool (Google search). Also - isn't the very high failure rate interesting? 'Sometimes makes errors' is one thing. 'Always makes errors' is something else.
  Quoting@joshgans@TimHarford You need to use a real AI agent to do that task.

  GoogleRelated

Creator of Flask and Jinja. Writes about software at lucumr.pocoo.org.

• Interpreting Pangram

  Original prompt to generate a David Sacks like tweet

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Writes Hyperdimensional, a newsletter on AI policy and governance. A White House AI policy adviser in 2025; joined OpenAI on 6 July 2026 to lead its Strategic Futures team.

• I’m going to delete this tweet and post screenshots here for posterity. I stand by the argument but we shouldn’t fight. This is too important for squealy arguing. I am going to choose to see David’s OP as an olive branch and operate under that assumption. TYFYATTM!

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American author of The Subtle Art of Not Giving a F*ck and Everything Is F*cked. Writes essays and book reviews at markmanson.net.

• Been reading all these 9/11 stories today and realized that there are so many heroes that walk among us. We just never find out because we are so blessed to never have to live through a moment that requires them. Never forget that the vast majority of people are profoundly good.

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Technology writer of Spyglass, a newsletter about technology and media. Previously a reporter at TechCrunch and an investor at GV.

• Forget Tim Apple, say hello to John Burgundy... (some thoughts on the iPhone Duo keynote)

  spyglass.org

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Creator of Homebrew, the macOS package manager, and a Swift developer.

• Clicking the Grok button is rarely satisfying. If the tweet is “I like grooglefabs” Grok will delightfully tell you “FooBar comments on his love of grooglefabs. A common sentiment among the fabblegrooglers”. I don't want to type “wtf is a grooglefab”. You are meant to be AGI.

  AGIRelated

Machine learning engineer and consultant focused on RAG and retrieval systems. He writes about applied AI engineering at jxnl.co and is the author of the instructor library.

• people reviewing jasmines tweet before the culture fit interview
  Quoting@jasminewsunI hear roughly 3 reasons people keep working at AI labs despite believing in ~10% extinction risk: 1) Techno-determinism: Someone will build ASI no matter what, and I can do it better & more safely than China/OpenAI/etc 2) Consequentialism: ASI might kill us, but it also might produce utopia/immort…

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Mac and iOS developer; founder of Red Sweater Software (MarsEdit, FastScripts) and co-host of the Core Intuition podcast.

• Oh hey everybody, I just remembered I keep receipts on the worst people who ever interact with me. Please don't forget that Vandad Nahavandipoor (@VandadNP) is a guy who thought it was OK to assure me that I would suck Trump's dick.
  Quoting@danielpunkassSpeaking of dingalings. I want to remind everybody that you should never, ever, ever, work with Vandad Nahavandipoor (@VandadNP). He's a bad guy.

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Mathematical biologist; Senior Lecturer in the Department of Mathematical Sciences at the University of Bath and author of The Maths of Life and Death and How to Expect the Unexpected.

• x.comI'm going to be talking at the Royal Institution on Saturday September 19th. "Explore how our understanding of reality is shaped by missing information, just as much as what is there." Don't forget to get your tickets and to come and say hello:

  rigb.org

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• BlueskyI'm going to be talking at the Royal Institution on Saturday September 19th. "Explore how our understanding of reality is shaped by missing information, just as much as what is there." Don't forget to get your tickets and to come and say hello:

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Professor of finance at NYU's Stern School of Business, known for his work on valuation. He publishes his data, spreadsheets and classes free at Damodaran Online and writes the Musings on Markets blog.

• I use this Vinod Khosla tweet with apologies to Vinod, since tweets are often out-of-context or emotive, to launch a discussion on the trade-off between scaling up and building business models (profitability) that every business faces.

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Economist; former chief economist of the International Monetary Fund.

• another tweet written a bit too fast. By "central bank debt" I mean public debt held by the central bank". Apologies☹️
  Quoting@ojblanchard1No, and useful to repeat: Contrary to interventions such as QE or debt management by Treasury, cancellation of central bank debt has zero mechanical effect on the liabilities of either the central bank (bank reserves are the same) or the government (the debt held by private investors is the same)

  public debtinterest ratesRelated

Data scientist at Our World in Data and author of Not the End of the World. Writes By the Numbers, working through energy and climate questions with the numbers in front of them, and revising in public when they say something unexpected.

• Forget more reservoirs; should the UK just build desalination plants instead?

  Maybe, but not as a way to manage droughts. That’s when they seem to break.

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American software engineer; worked on code-server at Coder and teaches TypeScript and open-source contribution. Publishes at joeprevite.com.

• today is the day you stop doomscrolling stay with me - this will take 5mins 1. open the AppStore 2. download "ScreenZen" (free) 3. configure limits (e.g. 4 15-min sessions) 4. start with 1 social media app 5. a few days later, add another 6. repeat until you've added all apps too busy right now? add a calendar event with this tweet and do it this weekend trust me, you'll thank me next month

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Journalist; wrote We Are Eating the Earth on food and climate, and writes the newsletter Emissions.

• Reflecting on the Reflecting Pool, and Whether Our Government Can Manage a Two-Car Funeral

  Corruption, weaponization, and politicization are all bad. But don't forget incompetence!

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Software engineer; co-founder and former CTO of Tailscale, previously on the Go team at Google.

• this old tweet is getting some likes (why? mysterious), so I re-read it, and still like it. it also applies really well to what I am working on now: I need lots of VMs for agents, but I don't need lots of CPU/RAM. hence @exedev
  Quoting@davidcrawshaw@danluu one of the big early ideas behind tailscale was a single computer is powerful enough to solve almost every problem, and that this is not widely understood. we need fewer distributed systems and more spreadsheet implementations.

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Brazilian software engineer, creator and maintainer of GoReleaser; works on Copilot CLI at GitHub. Writes about tooling and his setup at carlosbecker.com.

• Underrated tweet I think it also applies to any software, so long it has users
  Quoting@solomonstreRule #1 of open-source: no is temporary, yes is forever.

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Full-stack developer, creator of Tailwind CSS; writes at adamwathan.me and makes courses and screencasts for web developers.

• Started playing with @bot this week, first problem I'm using it to solve is automatically picking my lunches from Factor every week because any time I forget they send me stuff I don't like. Becoming really easy to see how the way we use the web is going to totally change.

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Designer and engineer; formerly principal research engineer at GitHub Next; writes at wattenberger.com.

• there's something rotten in the air when >90% of the replies to a tweet like this are mean spirited sure, it might not be your thing and it's easy to forget this box doesn't go straight into the void. but can we try to bring more kindness into the world?
  Quoting@WattenbergerI look away for one week and VSCode got cute?!

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Indian technology consultant and writer. Former editor of Beautiful Pixels; writes about Apple hardware and Mac software at nuclearbits.com.

• I saw Atul's tweet and it made me wonder too. How many establishments are actually compliant? So we asked the FDA. Here's what they say!

  mid-day.com

  Quoting@atulkasbekarSerious question Of all the raids that were carried out on food establishments, were there any places that were given a clear green chit? As in, everything is perfect, well done! I’d really like to know which places were adhering to standards

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Web developer and writer; an early GitHub employee, author of speaking.io and of widely read essays on startups and product.

• Been nice seeing some of the cold approach stories in the HN comments of my post this afternoon: https://t.co/r1mfJXzPq3 You forget how little things (to you) might mean a lot to others!

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Writer of the personal-finance blog Of Dollars And Data and author of Just Keep Buying and The Wealth Ladder. Chief Operating Officer at Ritholtz Wealth Management.

• The Problem with Optionality

  I’ve seen a lot of discussions this year around maximizing freedom and optionality. For example, consider this tweet: If you ever get up $1M in cash Buy a new modern apartment in the UAE for like $550k (you have zero pr…

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Co-founder of Modem and a founding engineer at Sentry, where he went on to be VP of Engineering. Co-author of Third-party JavaScript, and co-host of the State of Agentic Coding podcast with Armin Ronacher.

• prompt-cardio — Prompt Faster: the vibe coding interview. A typing test disguised as an AI chat.

  Commitsfeat(ui): tweet-sized results card · feat: harder rank curve — CTO of Vibes now demands 140+ wpm · feat: swarms are engine-injected at rounds 2/4/6 — skill unlocks the spectacle

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Co-founder of AngelList. Writes and podcasts at nav.al in short, aphoristic pieces on startups, wealth and judgement rather than long essays.

• A Return to Code

  You’re listening to the Naval Podcast. This is Nivi, his regular co-host. Today we’re going to talk about vibe coding. Let me tee up the conversation with a tweet from Naval from March 23rd: “AI coding agents can now de…

  coding agentsRelated

Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".

• Farzapedia, personal wikipedia of Farza, good example following my Wiki LLM tweet. I really like this approach to personalization in a number of ways, compared to "status quo" of an AI that allegedly gets better the more you use it or something: 1. Explicit. The memory artifact is explicit and navigable (the wiki), you can see exactly what the AI does and does not know and you can inspect and manage this artifact, even if you don't do the direct text writing (the LLM does). The knowledge of you is not implicit and unknown, it's explicit and viewable. 2. Yours. Your data is yours, on your loca…
  Quoting@FarzaTVThis is Farzapedia. I had an LLM take 2,500 entries from my diary, Apple Notes, and some iMessage convos to create a personal Wikipedia for me. It made 400 detailed articles for my friends, my startups, research areas, and even my favorite animes and their impact on me complete with backlinks. But,…

  LLMsRelated

• Wow, this tweet went very viral! I wanted share a possibly slightly improved version of the tweet in an "idea file". The idea of the idea file is that in this era of LLM agents, there is less of a point/need of sharing the specific code/app, you just share the idea, then the other person's agent customizes & builds it for your specific needs. So here's the idea in a gist format: https://t.co/NlAfEJjtJV You can give this to your agent and it can build you your own LLM wiki and guide you on how to use it etc. It's intentionally kept a little bit abstract/vague because there are so many directio…
  Quoting@karpathyLLM Knowledge Bases Something I'm finding very useful recently: using LLMs to build personal knowledge bases for various topics of research interest. In this way, a large fraction of my recent token throughput is going less into manipulating code, and more into manipulating knowledge (stored as mar…

  LLMsRelated

Swedish essayist who writes Escaping Flatland, a newsletter of essays on relationships, thinking, writing and homeschooling.

• There's a fairly common assumption that to know yourself better, you should attend to yourself more—journal, introspect, meditate on your patterns. And there's something to this. But also. The more you make yourself an object of attention, the more you reinforce the narrating self—the self that has problems, the self that needs fixing, the self with its story of development. I notice that when I, instead, sort of forget about myself and attend deeply to the outer world (when I unself as Murdoch would say) I actually see myself more clearly in a paradoxical way. If I engage fully with somethin…

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Mac and iOS developer; founder of Red Sweater Software (MarsEdit, FastScripts) and co-host of the Core Intuition podcast.

• So ... when do we get to start acknowledging again what a complete and utter shithead hater Charlie Kirk was? Because I think his murder was appalling, too, but we should never forget what a bad person he was. I propose now.

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Roboticist; co-founded iRobot and Rethink Robotics, directed the MIT AI Lab, and publishes a scorecard grading his own dated predictions about AI, robots and self-driving.

• Deployment at scale takes decades

  Of course, I am filled with fear and anger at the political situation in the US, but we can’t forget about research and how it interplays with the innovation economy of the United States and other countries. The short a…

  AmericaRelated

British software developer at Laravel and creator of the Cachet open-source status page system. Podcaster; writes at james.brooks.page.

• tweet.new — Say hello to tweet.new, your shortcut to posting faster on X!

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CEO of Vercel; creator of Next.js and Socket.IO. Writes at rauchg.com.

• ray-city — A city animation that fits in a tweet

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Writer and engineer behind the blog Melting Asphalt, and co-author with Robin Hanson of The Elephant in the Brain.

• I'm excited about the LessOnline festival! May 31 – June 2 (Link in next tweet, smh Elon.....) Hit me up if you're planning to attend — it'll be great to see some internet friends IRL

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Writer and engineer behind the blog Melting Asphalt, and co-author with Robin Hanson of The Elephant in the Brain.

• mind-expanding short story by @etirabys about a "sapient mitotic species" this is a rare piece of fiction that's well grounded in evolutionary biology and psychology i read it about 6 months ago and have re-read it twice since 👇 link in next tweet

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Brazilian-American staff software engineer working on platforms, AI and developer productivity. Writes about engineering and his setup at ivansantos.me.

• That's my first tweet with @typefully. How come I didn't know about this tool before? 🔥

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Co-founder and partner at Union Square Ventures in New York. Has written the AVC blog almost every day since 2003, on venture capital, startups, music and crypto.

• This tweet stream showcases some of the writing by USV analysts over the years. Though they have moved on to bigger and better things, their writing and their ideas live on at USV and https://t.co/btPOKgjAa4. It is a gift that keeps on giving.
  Quoting@nickgrossmanReminder that applications are now open for the next class of @USV analysts! One of the ways that USV analysts work is through writing, both about thesis areas and new investments. To give a flavor, here are some highlights of writings by USV analysts over the years:

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Co-founded Neuralink and founded Science Corp, which is building a retinal implant; writes about neural interfaces and biology.

• What does Twitter asymptote to?

  Consider the following interpretation of Twitter: Twitter is a process that is applied to a human thought vector $x$, a time $t$, and a state vector $c_{t-1}$ which emits a value $tweet$ and a new state vector $c_{t}$.…

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Engineering leader and writer; wrote The Manager's Path and Platform Engineering, and blogs at Elided Branches.

• Driving Cultural Change Through Software Choices

    This tweet got me thinking about change, and how software engineers (and especially, Platform teams) can drive cultural change throughout companies. First, let’s take the question. You want to change the engineer…

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Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".

• A Recipe for Training Neural Networks

  Some few weeks ago I posted a tweet on “the most common neural net mistakes”, listing a few common gotchas related to training neural nets. The tweet got quite a bit more engagement than I anticipated (including a webin…

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Financial journalist; chief financial correspondent at Axios and host of the Slate Money podcast, previously a blogger at Reuters and author of The Phoenix Economy.

• Nota bene: Gallows humor

  Did you laugh when you saw this tweet?

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General partner at Benchmark Capital for over two decades; was the lead analyst on Amazon's IPO before moving into venture capital. Writes Above the Crowd on tech and marketplace economics.

• The Ezra Klein Show: VC Bill Gurley on Transforming Health Care

  In November of 2015, I posted a tweet that declared Benchmark was interested in discovering Internet healthcare investments. Our firm has had the good fortune to invest in many two-sided networks that used information a…

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