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Grant Sanderson
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New puzzle, as part of the series of monthly puzzlers with @MoMath1. As a variant: What if you start with pegs in all four corners of the square, and you want them to end up on corners of a bigger square?
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17 September
American author of speculative fiction, including The Paper Menagerie and the Dandelion Dynasty series, and translator of Chinese science fiction. Also a programmer and lawyer.
The first Julia Z adventure, ALL THAT WE SEE OR SEEM, is a Kindle monthly deal. You can grab it in anticipation of her return next year in WHAT BIRDS HAVE VANISHED. Quoting @headofzeus.bsky.social 'This is one of the best science-fiction books of the year' @theguardian.com It's publication day for #AllThatWeSeeOrSeem, the near-future thriller from the award-winning author of the #DandelionDynasty, @kyliu99.bsky.social Now available in Kindle Monthly Deals: Related
16 September
Security technologist and author of books including Applied Cryptography and Data and Goliath; writes the Schneier on Security blog and the monthly Crypto-Gram newsletter.
15 September
Economics professor at George Mason University and author of The Myth of the Rational Voter, Selfish Reasons to Have More Kids, The Case Against Education and Open Borders. Writes Bet On It.
14 September
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
AI research engineer working on large language models. He writes the Ahead of AI newsletter and is the author of Build a Large Language Model (From Scratch).
Since I had to discuss the "pacing" with a lot of people this weekend, here are my two cents: I don't think pacing literally means that these companies will be "slowing down" training and development in any way. "Pacing" here means adding a framework for more checks. We have seen some of that "pacing" already in recent months, when Mythos wasn't released as-is but instead a delayed, nerfed Fable variant was released. Or when Astra wasn't released right away / there is an existing Astra model that hasn't been released yet. These Mythos/Fable and Astra pacing decisions were ad hoc. If you are a… Related
9 September
Co-creator of Django and creator of Datasette; writes daily at simonwillison.net.
"Deterministic code checks the result" sounds like they might be implementing a variant of the DeepMind CaMeL paper simonwillison.net
Quoting @dps One threat we’re particularly focused on is prompt injection, and we handle it in layers. The model is trained to recognize and resist it. The harness marks anything coming from an untrusted source. Deterministic code checks the result. And an ensemble of classifiers runs where the agent can't reac… Google Related
5 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.
Here's some crazy geometry in 4, 5 and 6 dimensions: The 4-demicube has 8 vertices. It lives in 4 dimensions. You get it from a 4-dimensional cube - which has 16 vertices - by keeping every other vertex, throwing away half. That leaves 8. What are its top-dimensional faces, aka 'facets'? Surprise: there's only one kind! All of them are regular tetrahedra. In higher dimensions the demicube has two kinds of facet - one from the cube's corners, one from the cube's facets. But in 4 dimensions the two kinds happen to be the same shape: the tetrahedron! That's why the 4-demicube is especially symme… Related
1 September
Software engineer who writes about low-level and systems programming at nullprogram.com; author of the Elfeed feed reader, the Endlessh SSH tarpit and Enchive.
30 August
Belgian engineering lead, Microsoft MVP and public speaker. Creator of Front Matter, a headless CMS extension for Visual Studio Code.
New in Worklog: Lists. Some checklists you run over and over: a packing list, a release run, the monthly invoicing routine. Tick through it, press Start again, and it is waiting unticked for next time. Can you spot that I'm planning my cycling trip? Related
29 August
Dutch bootstrapper who builds and runs their internet startups alone — Nomads.com, Remote OK, Hoodmaps, Photo AI and Interior AI — and has written about it at levels.io since 2013. Posts as @levelsio.
Their words
Today is a very historical moment for AI video generation You can now generate AI video faster than you can watch it Before it'd take let's say 2-5 minutes to generate 15 seconds of video @fal made a post-trained Minimax H3 variant called Max which is 50x faster than the original but still maintains quality It generates 15 seconds of video in 9 seconds!
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levels.io
26 August
Psychiatrist and clinical assistant professor at Case Western Reserve University. Writes Psychiatry at the Margins on the philosophical and scientific arguments inside psychiatry and the psy-sciences.
But sometimes the house is already uninhabitable and haunted by mysterious entities that seem to come from nowhere, and it makes sense in a situation like that to shine a light on dark corners… Quoting @ClipperRen werner herzog on why he will never go to therapy "i'd rather die than go to an analyst" "if you harshly light every last corner of a house the house will be uninhabitable it's like that with your soul" he just dropped the coldest take on therapy ive ever heard and somehow made it sound completely n… Related
5 August
Writer living in Brooklyn and former Man Repeller features director; writes the weekly newsletter Maybe Baby on culture and consumption.
25 July
Programmer and writer on computer architecture, performance, and software reliability. He has worked on CPU design at Centaur Technology and on software at Google and Microsoft, and writes long-form technical essays at danluu.com.
In another variant of https://danluu.com/learn-what/, I caught up with a former colleague who worked on automated theorem proving. It turns out he's had an interesting career doing all sorts of interesting stuff using the skills he developed by spending a decade writing/using theorem provers. At one point, he said, "if you use X like a theorem prover, it works really well", which surprised me to hear, but of course this is a highly generalizable skill just like compilers or benchmarking/evals. Related
16 July
Co-founder of Ximian and Xamarin; CEO of GitHub from 2018 to 2021; now an independent investor and funder of open technical projects, including the Vesuvius Challenge to read the Herculaneum Papyri.
Vesuvius Challenge has been quietly making a lot of progress; we read a full scroll, developed a new unwrapping algorithm with a global spiral prior, and we just launched a new $1M grand prize for reading one of the scrolls we've scanned. There are also 10 $50k prizes available for finding text in a scroll we haven't found text in before, plus monthly progress prizes. Join the discord! Quoting @scrollprize A new phase BEGINS! 🚀 🏆 $1M Grand Prize 💰 $2M+ in open prizes 👑 $20K awarded every month to the best submission https://t.co/P6VuhVYK1L Will you read the next scroll? 👀 Spread the word and repost! 🔁 Related
17 June
Mathematician and maker of the 3Blue1Brown YouTube channel, which explains mathematics through animation. Creator of the open-source Manim animation library and founder of the Summer of Math Exposition.
22 February
Independent AI policy researcher; led policy research at OpenAI from 2018 to 2024, latterly as senior adviser for AGI readiness.
12 February
Professor of economics at George Mason University and Bartley J. Madden Chair at the Mercatus Center. Co-writes the blog Marginal Revolution and co-authors the textbook Modern Principles of Economics with Tyler Cowen.
benchmarks
Their words
We show that equilibrium generically occurs at neither the Harberger nor Glaeser-Luttmer benchmark. Cost-minimizing suppliers drive allocations to vertices, not interiors. Corners are not an assumption but an outcome about what cost-minimizing suppliers choose. The correct benchmark is corners, not random, and corners generate qualitatively different welfare properties: losses far larger than either efficient or random distributions, and discontinuous jumps from small parameter perturbations.
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arxiv.org
9 February
American software engineer; worked on code-server at Coder and teaches TypeScript and open-source contribution. Publishes at joeprevite.com.
14 January
Writer and artist, author of Steal Like an Artist; publishes a weekly newsletter and an annual list of the books he read.
Their words
Several people recommended this memoir to me after learning about my monthly mixtape project.
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austinkleon.com
17 December 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.
Health Insurance: I'm still really happy with what I've been doing since since 2020: - Direct primary care (DPC) physician subscription - Sedera Health Sharing (alternative to insurance with a $5k annual max out of pocket type of setup) https://t.co/RB2oXA82eL Total monthly cost for me at 51 is about $400. And no copays for doctor visits! Cautions: works best for people without existing chronic expenses. Also check the ACA marketplace including subsidies which can be very affordable in some cases. Quoting @LancerShull @mrmoneymustache Wondering what your latest take is on health insurance? The marketplace plan I have more than doubled after an increase in income. Thanks for sharing your TRT experience. 👍💪☕ Related
10 October 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.
I'm overdue for a @Betterment experiment update, but I really like these monthly emails. None of my other brokerages does it nearly as well. Also: Wooohoo to my dividend income alone having surpassed my $1000/month auto deposit! This is where your wealth really becomes a Snowball. Related
25 September 2025
Independent AI policy researcher; led policy research at OpenAI from 2018 to 2024, latterly as senior adviser for AGI readiness.
19 June 2025
Independent AI policy researcher; led policy research at OpenAI from 2018 to 2024, latterly as senior adviser for AGI readiness.
8 July 2024
Cryptography engineer; maintains Go's cryptography libraries as a full-time open-source maintainer, funded directly by companies that use them.
open source
Their words
Clients still pay a fixed monthly retainer to ensure the professional maintenance of the whole portfolio, and to get access to the expertise of all of Geomys’ maintainers.
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words.filippo.io
25 April 2023
Software engineer writing about maintenance, open source and the industrial reality of software — the author of "I am not a supplier".
We Need More Process Engineering in Software When you peruse the depth of software engineering as a discipline, you find a lot of techniques and tools laying around in corners. Pattern matching, tighter type-checking compilers, property-based testing, snappy IDE,…
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17 March 2022
Cryptography engineer; maintains Go's cryptography libraries as a full-time open-source maintainer, funded directly by companies that use them.
29 May 2019
Software design writer and chief scientist at Thoughtworks; wrote Refactoring and Patterns of Enterprise Application Architecture.
12 June 2018
Game developer and moral philosopher; made QWOP, GIRP and Getting Over It, and teaches at the NYU Game Center.
Their words
It's been my view for a while that it's a worthwhile exercise for any game designer to make a chess variant, a dice variant and a Pong variant.
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FLOP foddy.net
3 January 2018
Creator of the Zig programming language; president and lead developer of the Zig Software Foundation.
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