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Andrew Kelley
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19 September
Writes The Diff, a newsletter on inflections in finance and tech read by hedge fund managers, founders and VCs. Previously worked in finance at SAC Capital/Point72.
18 September
Designer, product manager, YouTuber and developer who has written about technology at Birchtree since 2010. He makes the Quick Reviews and Quick Notes apps and the A Better Computer YouTube channel.
16 September
Venture capitalist and founder of Theory Ventures, previously a partner at Redpoint. Writes a near-daily blog on startups, SaaS metrics, data and AI.
Huge milestone for @seanmcccarthy & the @Backopsai team! Congratulations on the Series B 📦 Quoting @Theoryvc Moving a shipment takes more than a truck. Pickups need confirming, documents need checking, and changes need coordinating. We sat down with @Backopsai CEO @seanmcccarthy to talk about why logistics is still so manual and what his team is doing to change that. Related
14 September
Designer, product manager, YouTuber and developer who has written about technology at Birchtree since 2010. He makes the Quick Reviews and Quick Notes apps and the A Better Computer YouTube channel.
1,000 hours of nonogame I hit a pretty fun milestone in nonogame today: 1000 hours played. No, not by me, but by the community of people who come and play this game every day. I know this is small potatoes compared to whatever other games you…
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Creator of Flask and Jinja. Writes about software at lucumr.pocoo.org.
Former L8 engineer at Meta, Microsoft and Atlassian, now writing and building solo on agentic engineering. Writes Kun's Field Notes and posts a lot about AI coding agents on X.
sharing an emotional milestone plus some tips for growing a social media presence if you came across my youtube channel, you might have seen i always had “ex-meta” or “L8 principal” mentioned in the title of my videos i hated doing it, and every time i published a video i always a/b tested removing that title unfortunately, every single time, removing it would destroy the reach and the videos simply wouldn’t be seen nearly as much the latest video was the first one i ever had where the “ex-Meta L8” title no longer made any difference. and i have now picked the variant that’s just “with Kun” i… Related
13 September
Mathematical physicist at UC Riverside. Wrote This Week's Finds in Mathematical Physics and now the Azimuth blog on mathematics, physics and environmental science.
𝐅𝐄𝐑𝐍 𝐒𝐏𝐈𝐊𝐄𝐒 We know there was an asteroid impact around when the dinosaurs went extinct 65 million years ago, because we see a rare metal called iridium in the strata from this time - and droplets formed by molten quartz. But we also see lots of fern spores! This is called a 'fern spike', and it's not the only one. Ferns spread rapidly using spores, and they're tougher than they look. When everything dies, these ancient, humble plants are the first to recolonize the land. They did it after the Permian-Triassic, Triassic-Jurassic and Cretaceous-Paleogene extinction events. They may d… Related
3 September
Co-founder of Y Combinator and Viaweb; essayist at paulgraham.com.
startups
Their words
It's hard it's harder to start a rocket startup on no money, but even a rocket startup you can start on not much money because what you do is you adjust for how much money you've got.
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youtube.com
2 September
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.
Excited to share the amazing companies sponsoring The Pragmatic Engineer Podcast the fall: turbopuffer is our presenting sponsor. How the company started is epic: founder Simon Eskildsen told Cursor he can reduce their database bill by 95%... and he did (!!) turbopuffer.com/pragmatic (cont'd) Related
26 August
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.
Few people care more about performant code than @cmuratori.bsky.social. Casey is a down-to-earth programmer, game dev, performance nerd. A refreshing episode about why the basics (still) matter, and why learning to read Assembly remains useful for anyone who cares about performance: (cont'd) Related
17 August
Machine-learning researcher on open language models; writes the Interconnects newsletter and the RLHF Book, after leading post-training at Ai2.
Personal milestone: 1000 true fans of my newsletter Interconnects! Hitting a very long term goal feels great. I’m happy to get to be an independent voice in AI. Cultivating a paid base helps me commit to that longer term, and scale Interconnects’ impact. Related
11 August
Chief scientist at Redwood Research, where he works on technical AI safety and AI control.
Their words
I would say that I expect like full automation of AR&D perhaps somewhere around like 2031 2030 and then getting to like the like beats all humans on the job milestone. Maybe I expect median around 2033
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youtube.com
7 July
Software architect and futurist; founded ClariNet, chaired the EFF, and has written about robocars for two decades.
self-driving cars
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Several companies have tried to declare they met a major milestone by having "nobody behind the wheel" and moving supervision to the passenger seat. It's a bad idea
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ideas.4brad.com
1 July
Monetary economist known for NGDP-level targeting. Wrote TheMoneyIllusion until it closed in 2024 and now writes The Pursuit of Happiness.
15 June
Writer and teacher on productivity and personal knowledge management. Author of Building a Second Brain and founder of Forte Labs, which runs the course of the same name.
What I’ve Learned From Selling 500,000 Books I recently reached an incredible milestone – 500,000 books sold across 8 titles. That includes 5 self-published Kindle ebooks, 1 co-authored book, and 2 traditionally published books, all released from 2017 to 2023. Her…
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5 January
American writer and long-term traveller. Blogs at tynan.com about travel, owning few possessions, habits and the gear he carries; author of Superhuman by Habit and Make It Big.
Their words
It's such a pointless achievement and yet when you're at 99, all you think of is going to one more country so you can never think about the number of countries you've been to again.
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Cześć 2025 tynan.com
21 December 2025
Economist; Professor of the Practice of Economic Policy at Harvard, nonresident senior fellow at the Peterson Institute, and Chairman of the US Council of Economic Advisers from 2013 to 2017.
Their words
I first read it in college and recently, as we approach this milestone, decided to re-read it and was amazed about how fresh and vivid it felt, as well as how nuanced and humane it is.
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fivebooks.com
25 November 2025
Medieval historian at the LSE; writes Going Medieval and The Middle Ages: A Graphic History, and spends a lot of it correcting what people think the period was like.
20 November 2025
Pen name of the Canadian-American writer behind mrmoneymustache.com, a blog on frugality, early retirement and index-fund investing that has run since 2011.
Electric Work Truck Diaries: What kind of mileage do you think I'll get with this 1500 lb trailer of tools and materials? Heading about 40 miles down the Interstate and into the big city. (It's a set of heavy metal railings I built for a house upgrade I'm doing there) @Tesla Y remains the best do-everything car on the market I think. Related
31 July 2025
Anthropologist; wrote Genghis Khan and the Making of the Modern World and The Secret History of the Mongol Queens.
Their words
But the one thing that they valued were all the artisans, everybody who had a skill. And that skill could be making a pot. It could be hammering out a metal plate. It can be weaving carpets, it can be translating or just reading and writing. Every person with a skill was spared.
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youtube.com
17 December 2024
Software engineer in Chicago; writes the cassidoo.co blog and a weekly developer newsletter.
Their words
OHTO MS01 all-metal drafting pencil
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cassidoo.co
5 February 2024
Experimental psychologist and author of the blog Experimental History, on psychology, science reform and creativity.
Look at me, a dummy who can’t even reliably taste the difference between alkali metal salts Quoting @mold_time A few weeks ago we spent some time sitting around tasting different alkali metal salts with @a_m_mastroianni To us, the difference between NaCl (sodium chloride, normal table salt) and KCl (potassium chloride) seems very obvious, but Adam said they taste about the same to him. Related
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