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Systems and developer-tools engineer at Cloudflare as of 2026, on durable infrastructure for AI agents; worked on React and PartyKit before that. Writes at sunilpai.dev.

• It’s been 2 hours and I can already tell this is going to be my most popular post. See the replies. And I’m getting so many DMs from people who went through the same, I’m glad it’s connecting. 2 quick things - - please consider the solution!! it’s counterintuitive and no one considers it but it’s super effective - I hope managers see this too and use it as a tool to help their reports
  Quoting@threepointonenew post: the senior engineer death spiral https://t.co/xzgU1jVBRh a friend just started a big job and asked for some advice. so I braindumped a monologue about a super common failure mode I see with engineers and posted it here, hope it helps whoever it can.

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Sociologist at Duke University writing on markets, exchange and moral order, and on plain-text and data-visualisation tools for social science.

• I assume that when whoever is making it IPOs they will reveal the full lineup implied by the existence of Tilly Norwood.

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Writes The Pragmatic Engineer, the software-engineering newsletter, and wrote The Software Engineer's Guidebook. Formerly an engineering manager at Uber, and at Microsoft/Skype and Skyscanner before that.

• So many people in the replies saying it's overcomplicated, and no proof that this works And then plenty other folks saying that at their startup/company they built this the below pretty much, and then a few new things Different speedlanes when it comes to agents + pipelines
  Quoting@GergelyOroszHere's what OpenAI's agentic software factory looks like, today. Details: https://t.co/UUZufLxG2r (thanks to all the OpenAI folks who explained how it works! And Perf Factory looks especially interesting to me)

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Economics professor at the University of California, Berkeley and a former Deputy Assistant Secretary of the US Treasury. Author of Slouching Towards Utopia and writer of the Grasping Reality newsletter.

• Spreads on financing the datacenter buildout are still small enough not to seriously discourage it, but large enough to reveal that the financiers are getting nervous about a non-zero chance of a bigdeal default on their loans: **DataCenter Risk Is the Real Thing: CHART OF THE DAY** For the second day in a row, looking at debt & datacenters & Interest-rate spreads; the widening in hyperscaler datacenter build-out financing spreads is not driven by dealer hedging of new issuance… 1/

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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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Independent iOS developer and podcaster; co-hosts the Accidental Tech Podcast and Analog(ue), and makes the apps Callsheet, MaskerAid and Peek-a-View.

• The Sonos app recently added a universal thing where you place two fingers on the display and rotate to adjust a virtual volume “dial”. It’s aces. Really really great work.

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Deep-learning researcher and Turing Award laureate; founder of the Mila institute.

• Over the past few days, I've taken the time to summarize my thoughts on the recent incidents involving agents’ misaligned behavior. We don't know with certainty what comes next, but we know where these issues originate, and this can help us plan the path forward. Please feel free to ask your questions in the replies, and I’ll try to answer some of them in the coming weeks.

  yoshuabengio.org

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Programmer on the Dart language at Google and author of Game Programming Patterns and Crafting Interpreters; previously a game developer at EA.

• RE: https://climatejustice.social/@chu/117242750410634529 I love this toot and all the replies.

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British designer and technologist; co-founder of the design studio BERG, which made Little Printer, and writer of the blog Interconnected.

• Tough job for the Apple Event today. Unless they reveal a fruit fly brain simulation that speeds up App Store review or drop a Millennium Prize solution as the fix to the iPhone Duo screen crease, it’s all going to feel pretty underwhelming by comparison

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Writer of the newsletter bookbear express, on psychology, relationships, non-attachment and taste; based in San Francisco.

• just realized replies to my substack posts to have been going to spam for, oh, about a year. SORRY IF YOU EMAILED ME 💔💔💔

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Writes The Pragmatic Engineer, the software-engineering newsletter, and wrote The Software Engineer's Guidebook. Formerly an engineering manager at Uber, and at Microsoft/Skype and Skyscanner before that.

• The Pulse: tech companies move to open AI models

  Cost-saving efforts reveal that moving simpler workloads to open AI models is the easiest way to save ~50% on AI bills. Also: automated software maintenance experience, and more

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Machine learning engineer and independent AI consultant. He writes about LLM evaluation, tooling and applied ML at hamel.dev, and previously worked on machine learning at GitHub.

• Curious why machine learning is not applied to the X timeline more? If somebody is replying once a minute for 8 hours they should be flagged. When I look at reply bot replies its super obvious
  Quoting@simonwQuestion for people who run autoreply bots here: are you not worried about the negative impact they have on your professional reputation? Anyone checking your profile here - a potential future employer for example - will instantly be able to tell you automated replies with a bot

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Developer and podcaster; created Instapaper and Overcast, co-founded Tumblr, and co-hosts the Accidental Tech Podcast.

• RE: https://infosec.exchange/@clayton/117175171619298911 It's OK. This feature is awesome, and one I use heavily. Every social network needs a few mutes here and there. Nobody inherently deserves anyone’s attention. If someone replies in a way that makes me think, "I'd rather not hear from this person again,” I just mute forever. No aggressive block, no report or feedback, no way for them to know. It's not meant to send a message, get revenge, or influence anyone else — just tailor my feed for me.

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Software engineer and founder of Block Party; previously an engineer at Pinterest and Quora, and a co-founder of the non-profit Project Include and the tech diversity data project Where are the Numbers?

• i'm always so excited to see that there are new replies to my slack threads until i realize it's just claude (sorry claude)

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Writes jvns.ca, turning "hard and scary" topics — networking, debugging, Linux internals — into plain explanations and hand-drawn comics. Publishes Wizard Zines, illustrated programming zines. Software developer based in Montreal.

• how do you think about how SSH public key authentication works (versus passwords) and what about your mental model makes you trust it? please only answer if you _don't_ understand the math of how RSA (or elliptic curves etc) works, I'm interested in exploring what it means to understand the interfaces around public key authentication without actually learning number theory (also obviously do not try to explain the math to me, also don't explain to folks in replies unless specifically asked)

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Software architect and futurist; founded ClariNet, chaired the EFF, and has written about robocars for two decades.

• Rides In Waymo's Ojai Help Reveal Robotaxi Future

  Topic:  Robocars Tags:  forbes In 2017, I forecast that robotaxis would be the path for Chinese cars into the USA. It's happened. What do the economics of Chinese robotaxis look like?

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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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Web infrastructure engineer and standards editor; chaired the IETF HTTP working group and co-authored core HTTP and Atom specifications.

• What 120 million HTTP responses from Common Crawl reveal about how protocol extensions actually get deployed — and what that should tell us when we design new ones.

  mnot.net

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Engineering leader and writer; wrote An Elegant Puzzle, Staff Engineer and The Engineering Executive's Primer, and blogs at Irrational Exuberance.

• Revised rules of engineering leadership.

  From early 2014 through late 2020, I was working in hypergrowth environments, which are challenging, but also educational. The most valuable feature of hypergrowth is that your mistakes reveal themselves next month rath…

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Freelance web developer and instructor. Author of the Dive Into Docker course; writes tutorials on Docker, deployment and development environments at nickjanetakis.com.

• Being able to swap windows and rotate panes in tmux is handy. You can do leader + < and swap a window to the left or right in the menu. You can also do leader + { and leader + } to rotate panes. There's also leader + space to cycle pane layouts.

  nickjanetakis.com

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Founded CD Baby in 1998 and sold it in 2008, giving the proceeds to a charitable trust for music education. Since then a writer and speaker: five books and 550+ articles, published first at sive.rs, which they hand-code and keep free of advertising.

• Fight Club: I liked it the first time years ago, but watching a second time when you already know the end reveal? Elevates it from good to great. So many brilliant details in the screenplay. What else in life is better the second time?

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Computer scientist and director of the MIT Digital Currency Initiative; her research covers distributed systems, databases and digital currency.

• Follow up on Bitcoin and Quantum: A proposed roadmap. https://t.co/QoOrvnxeOe tl;dr: we should work towards activating a PQ-safe output type with PQ signatures now. everything else (including escape hatches, zk proofs, commit/reveal, to freeze or not) can, and should, wait.

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Polyglot who speaks twenty languages and co-founded LingQ; argues that comprehensible input, not study, is what does the work.

• What Is the Hardest Language to Learn? The Full Ranking Explained (2026 Guide)

  What is the hardest language to learn? It’s a question I’m asked often. Here I reveal the answer from my experience and give advice and tips on how to get the most out of your language learning, even if that language is…

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Hosts the Lex Fridman Podcast — long, unhurried conversations with scientists, engineers and public figures. Several of the interviews quoted elsewhere on this site are episodes of it.

• It was an honor to hang out with Jensen Huang, CEO of @nvidia, and do a long-form podcast with him. Really fun & fascinating technical deep-dive conversation on & off the mic. One of the most brilliant & thoughtful human beings I've ever met. NVIDIA is the most valuable company in the world by market cap and is the engine powering the AI revolution. Podcast probably out tomorrow (Monday) unless I get stuck in too many interesting conversations while running around in SF ;-) PS: I haven't checked my messages in days. Sorry for slow replies 🙏 Trying to stay deeply focused at in overwhelmingly…

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Professor of Cognitive and Computational Neuroscience at the University of Sussex, co-director of the Sussex Centre for Consciousness Science, and author of Being You: A New Science of Consciousness.

• Evolving reservoir computers reveal bidirectional coupling between predictive power and emergent dynamics

  dynamics-dynamics that make the whole system "more than the sum of its parts." We examine the relationship between prediction performance and emergence by leveraging quantitative metrics of emergence and modeling enviro…

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Genomics researcher and writer on science, biotech and the culture of research.

• Of course motherhood drives the gender wage gap

  Discussions around the motherhood wage gap reveal the limits of autism and the benefits of female intuition

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Energy and decarbonisation analyst; publishes an annual chart deck on the state of the transition, and was chief content officer at BloombergNEF.

• Traveler’s Tales

  Travel insights from energy conferences reveal growing uncertainty in decarbonization capital deployment amid trade tensions. China's energy exports shift toward global south as electricity consumption outpaces all foss…

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