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Ivan Santos
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You can’t be perfect, no one needs you to be perfect anyway, it’s too expensive to try to be perfect, and everyone is really happier at the end of the day if you accept those facts. - Implementing Service Level Objectives (Alex Hidalgo)
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18 September
Writer and author of All the Wrong Moves; his newsletter covers meditation, relationships and creativity, and he co-runs a perfume line.
15 September
Creator of Homebrew, the macOS package manager, and a Swift developer.
Products for devs are quite dead. SaaS for devs is dead. There are exceptions, though I think you have to extrapolate on variables that are not raw software. I have ideas and am implementing them. Mostly in private because building in public also can no longer be capitalized upon. Seemingly. Quoting @alex_holovach my WHOOP subscription expired so i had codex reverse engineer it and build my own app - telemetry goes to my prometheus server - grafana and the app visualize it - hermes monitors metrics and plans workouts next wanna build my own Zwift and Strava the era of personal software is here SaaS Related
13 September
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).
Reasoning from scratch round 3: This time, I cover generating a verifier for... a) ...evaluation (base model versus any future model improvement) b) ...the reinforcement learning with verifiable rewards (RLVR) training later on 00:00 Introduction 01:21 Four approaches to LLM evaluation 07:20 Verifiers and reinforcement learning with verifiable rewards 10:52 Notebook setup and dependencies 13:43 Section 3.1 Building a math verifier 18:57 Section 3.2 Loading a pre-trained model to generate text 24:34 Generating and displaying model answers 29:23 Section 3.3 Implementing a wrapper for easier tex… LLMs 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
6 September
Chief Scientist at OpenAI. Worked on the research that turned scaled reinforcement learning into reasoning models, and writes about where he thinks that path leads.
Their words
We may be used to thinking of AI as tools, but some agents will be pursuing their own objectives.
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An Alien Mind openai.com
3 September
Creator of Flask and Jinja. Writes about software at lucumr.pocoo.org.
2 September
Psychologist and writer. Author of the memoir Troubled: A Memoir of Foster Care, Family, and Social Class, and of a newsletter on human nature, psychology, social class and what he calls luxury beliefs.
Their words
Happier couples tend to give each other the benefit of the doubt. Rather than assuming "My partner doesn't care," they're more likely to consider that the other is tired, distracted, overwhelmed or simply unaware of the impact of their behavior.
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robkhenderson.com
31 August
Mac and iOS developer at the Iconfactory, where he has worked on apps including Twitterrific and Tot. He writes about development at furbo.org.
17 August
Emeritus professor of war studies at King's College London; wrote Strategy: A History and Command, and writes about the wars in Ukraine and Gaza as they happen.
16 August
Programmer and teacher; writes on software, learning and the web, and makes the Coding Blocks video course.
Their words
Nice and entertaining introduction to the ideas of mindfulness and meditation.
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rakhim.org
10 August
Swedish designer and programmer. Designed early Spotify, worked at Facebook and Figma, and created the Inter typeface.
Is there a service where I can rent access to Linux desktop machines with actual displays? We're implementing the Playbit runtime for Linux and it's surprisingly difficult to test various desktop configurations. We need a real GPU with a display connected, for testing dawn/webgpu, vsync, display sleep, etc. We use Modal and AWS, neither have had machines that I've been able to test with properly. Ideally there's a way to test a variety of systems (like ubuntu, arch, alpine etc) × GPUs (nvidia, amd, intel) × window managers. Linux Related
Software engineer at PlanetScale and creator of the vim-go plugin. Writes at arslan.io about Go, tooling, industrial design and books.
Their words
Nobody writes the code anymore. Instead you're basically planning, debating, implementing and reviewing with Agents.
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Joining Cursor arslan.io
1 August
Organizational psychologist and professor at the Wharton School. Author of Give and Take, Originals, Think Again and Hidden Potential, host of the Re:Thinking podcast, and writer of the GRANTED newsletter.
We don't just feel better during vacations. Our moods elevate in advance too. Evidence: People aren't always happier after a holiday, but they do feel happier beforehand. It gives them something to look forward to. Anticipated joy is a reliable source of happiness. Related
31 July
Writer on happiness, habits and human nature. Author of The Happiness Project, Better Than Before and The Four Tendencies, and host of the Happier with Gretchen Rubin podcast.
24 June
Writer on happiness, habits and human nature. Author of The Happiness Project, Better Than Before and The Four Tendencies, and host of the Happier with Gretchen Rubin podcast.
9 June
Historian of maritime strategy at the US Naval War College; wrote The Wars for Asia and works on why continental and maritime powers fight differently.
Their words
But the maritime world is about negative objectives. It's preventing things from bad things from happening. And um you can never prove that you prevented anything.
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youtube.com
27 May
Builds developer tools — SST, and now OpenCode at Anomaly. Posts constantly on x.com and writes almost never; the blog stopped in 2021.
13 May
Founder and CEO of the search engine DuckDuckGo, and co-author of the books Traction and Super Thinking.
I worked with Sidra on countless designs to get these shoes just right, and couldn't be happier with the way they turned out. A genuine collaboration with another team that cares about every detail. Get the DuckDuckGo x Atoms collab here: duckduckgo.com
Quoting @duckduckgo.com DuckDuckGo x Atoms When it comes to privacy, DuckDuckGo walks the walk. Now you can too, with the DuckDuckGo x Atoms shoes collab. Wear the world's most magically comfortable, lightweight shoes while repping DuckDuckGo. Shop now: duckduckgo.com/collaborations Related
3 April
Computer scientist and director of the MIT Digital Currency Initiative; her research covers distributed systems, databases and digital currency.
My take on Bitcoin and quantum computing: https://t.co/bq2HdAsnXQ tl;dr: I think the risk is high enough to warrant prioritizing designing, implementing, and evaluating post-quantum signature schemes and consensus upgrades in Bitcoin now. Related
29 March
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.
24 February
Programmer; wrote Redis and hping, and blogs about C, systems programming and working alone.
1 January
Mac and iOS developer at the Iconfactory, where he has worked on apps including Twitterrific and Tot. He writes about development at furbo.org.
10 October 2025
Emeritus professor of war studies at King's College London; wrote Strategy: A History and Command, and writes about the wars in Ukraine and Gaza as they happen.
Russia
Their words
Recall that one of Putin’s objectives in 2022 was to ‘demilitarise’ Ukraine. He has achieved the opposite.
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samf.substack.com
11 September 2025
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.
6 September 2025
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).
25 July 2025
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.
Bluesky New video on the details of diffusion models: youtu.be/iv-5mZ_9CPY Produced by Welch Labs, this is the first in a short series of 3b1b this summer. I enjoyed providing editorial feedback throughout the last several months, and couldn't be happier with the result. Related
x.com New video on the details of diffusion models: https://t.co/rRjJehNuF3 Produced by @welchlabs, this is the first in a small series of 3b1b this summer. I enjoyed providing editorial feedback throughout the last several months, and couldn't be happier with the result. Related
23 May 2025
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.
1 May 2025
Machine-learning researcher; has written the Lil'Log survey posts on how a model technique works since 2017, and worked at OpenAI from 2018 to 2024, latterly leading its safety systems team.
13 January 2025
Software engineer and educator; creator of Testing Library and of the EpicWeb.dev and EpicReact.dev courses.
Their words, before
If you're a guy in your early 20's, get married and have kids. Go into debt if you have to.
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Their words now
Most people should get married and have kids much earlier than the current average (and have more kids than the current average). Doing this successfully (without screwing it up with selfish pride) will make the world better and make them happier than anything else they’re doing.
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Software engineer and educator; creator of Testing Library and of the EpicWeb.dev and EpicReact.dev courses.
Their words
Most people should get married and have kids much earlier than the current average (and have more kids than the current average). Doing this successfully (without screwing it up with selfish pride) will make the world better and make them happier than anything else they’re doing.
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@kentcdodds on X x.com
22 July 2024
Co-founder of Superlogical, started in 2026 to build server-side terminal infrastructure; creator of Ghostty. Co-founded HashiCorp and created Vagrant and Terraform before that.
11 March 2024
Research scientist at Anthropic; co-creator of the Variational Autoencoder and, with Jimmy Ba, of the Adam optimizer, two of the most widely used tools in deep learning.
Happy to see that our work on diffusion model objectives (https://t.co/0qJRyangWX) is starting to get noticed, with e.g. Stable Diffusion 3 (https://t.co/vHxqwLH0eY) building on our result that the flow matching objective can be simply understood as a special case of diffusion. Related
19 December 2023
Writer on learning and skill acquisition; author of Ultralearning and Get Better at Anything, known for the MIT Challenge and the Year Without English.
Their words
I recently reviewed Beck's book, which is written as a practical guide for therapists implementing CBT.
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scotthyoung.com
13 December 2023
Research scientist at Anthropic; co-creator of the Variational Autoencoder and, with Jimmy Ba, of the Adam optimizer, two of the most widely used tools in deep learning.
Our paper on diffusion model objectives got accepted at NeurIPS'23 as an oral :-) @RuiqiGao will present our work at 10am CST. (Unfortunately I'm unable to be there myself due to getting covid) I'll post the slides below, feel free to reply with questions or comments. Quoting @RuiqiGao Looking for diffusion model advancements at #NeurIPS2023? Come to check our oral work "Understanding Diffusion Objectives as the ELBO with Simple Data Augmentation" w/ @dpkingma. New theoretical understanding, SOTA empirical results, and more! Arxiv: Related
30 October 2023
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.
30 May 2023
Programmer and entrepreneur; co-founded GitHub and created Jekyll, Gravatar and the Semantic Versioning spec.
Their words
While we love GraphQL for many use cases, implementing a secure and performant GraphQL API can be tricky and there is a definite cost to requiring it during early prototyping of your app.
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tom.preston-werner.com
1 May 2023
Designer and engineer; formerly principal research engineer at GitHub Next; writes at wattenberger.com.
8 September 2022
Writer on happiness, habits and human nature. Author of The Happiness Project, Better Than Before and The Four Tendencies, and host of the Happier with Gretchen Rubin podcast.
Their words
Happier at Home is the account of what she tried, and what she learned, when she undertook to be happier at home.
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gretchenrubin.com
1 September 2022
Pseudonymous writer; posts careful, funny investigations of everyday questions — air quality, seed oils, arguing, chess — usually by reading the studies.
Their words, before
That hokey unfashionable techniques like practicing gratitude turn out to have strong scientific evidence behind them
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Their words now
I was wrong about gratitude. I thought it was a guaranteed way to become happier
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1 December 2021
Emeritus Professor of Statistics at the University of Cambridge, former president of the Royal Statistical Society, and author of The Art of Statistics.
21 June 2021
Emeritus Professor of Statistics at the University of Cambridge, former president of the Royal Statistical Society, and author of The Art of Statistics.
11 April 2019
Designer and co-founder of Lux, makers of Halide, Spectre and Kino; formerly a designer at Apple.
30 August 2016
Emeritus Professor of Statistics at the University of Cambridge, former president of the Royal Statistical Society, and author of The Art of Statistics.
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