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

• httplint — Python library to lint HTTP messages

  CommitsAddress review: crash on non-text charset names, asymmetric-truncation mismatch, dropped-… · Fixed: don't report CHARSET_UNDECODABLE for a multi-byte char split at the content_sample…

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Programmer known for LiveJournal, memcached, OpenID and gearman; worked on the Go programming language at Google and later joined Tailscale.

• go-tool-cache — Do you like Go's built-in build & test caching but wish it weren't purely stored on local disk in the $GOCACHE directory?

  Commitsgocached: derive put-queue caps from the host and memory budgets · gocached: give inline PUTs their own put-queue lane · gocached: create main blob shard dirs only when a rename says they're missing

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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).

• mlxtend — A library of extension and helper modules for Python's data analysis and machine learning libraries.

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American novelist and critic, author of Real Life, The Late Americans and Minor Black Figures; writes the newsletter sweater weather on literature and culture.

• labyrinthmaxxing and minotaur hours

  i’m afraid of writing, what i’m doing about it

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CEO of Positive Sum and founder of Colossus. Hosts Invest Like the Best, interviewing investors and business leaders; the guests do most of the talking there.

• One of Michael Moritz's best stories on obsession is about the ride he got from Bill Gates when Microsoft was still private. "Bill Gates gave me a ride to the airport in his car. The radio was missing in the car, a big, gaping hole in the dashboard. I said, Bill, what happened to you, did you get ripped off? And he said no, I had it taken out. Why'd you have it taken out? Well, I drive from my home to the office, which is 7 minutes and 32 seconds, and then I'll drive from the office to the airport, which is however long. And he said if I've got the radio, I'm afraid that I'll switch it on and…
  Quoting@patrick_oshagMy conversation with Michael Moritz, one of the great venture investors of the last 40 years. Michael joined Sequoia in 1986 and co-led the firm with Doug Leone (@dougleone) from 1995 to 2012. His investments include Google, Yahoo, PayPal, and Stripe. His new book, Ausländer, traces his parents' es…

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Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.

• Releasefastconstmap v0.10.0 — v0.10.0 — PairedVerifiedConstMap, formats shared with Go and Rust — Fast, immutable, compact map from strings to 64-bit integers — for Python.

  Release notesPairedVerifiedConstMap, a cache-friendlier layout for the verified map, and file formats shared with the Go and Rust implementations. Nothing existing changes behaviour: every class, method and error is as before, and e…

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• Releasersconstmap v0.3.0 — v0.3.0: PairedVerifiedConstMap, interoperable formats — A static map from strings to u64 values using binary fuse filter construction. It can be several times smaller and faster t…

  Release notesPairedVerifiedConstMap, a cache-friendlier layout for the verified map, and file formats shared with the Go and Python implementations. This release is purely additive. Nothing was removed or renamed, and the CMAP0001 a…

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• Releaseconstmap v1.2.0 — A fast, compact, immutable map from strings to uint64 values in Go.

  Release notesPairedVerifiedConstMap, a cache-friendlier layout for the verified map, and file formats shared with the Rust and Python implementations. This release is purely additive. Nothing was removed or renamed, and the CMAP0001…

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Programmer, photographer and musician, best known for the Python Requests HTTP library and other Python tooling.

• Experimenting with making a little portable Requests–inspired Python module, called https://t.co/gzrf4pmNOY. Just for fun.

  github.com

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Creator of the Keras deep-learning library and the ARC-AGI benchmark.

• > One could even define intelligence as the efficiency with which one converts experience into competence; by this definition they lag very far behind us Yes, one could define intelligence in this way, and one would be right. By this metric current AI is approximately 6 OOMs less intelligent than humans. Your ancestors' evolutionary history did not prepare you for Python programming, yet you can learn to competently program in Python in a few hundreds of hours. An LRM needs the training data equivalent of ~1B hours (on top of all of its non-programming related training data). Another dimensio…
  Quoting@DKokotajloDan Selsam is a current OpenAI capabilities researcher. (since 2022) He was my boss for a while. He doesn't have a twitter account but has made this public statement of his views on AI risk and sent it to me to share: Dan Selsam's Personal Statement on AI Risk: I have been working on AI for over fi…

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Product designer and entrepreneur; author of Mobile First and Web Form Design; formerly a product director at Google; now building AI products.

• window cleaning robot is not afraid of heights. if/when there’s a humanoid robot for the home, will it learn to operate the window bot or learn to clean windows itself w/ a ladder?

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

• pyproject-tmpl — Template for Python projects

  CommitsFix managed-file header text: no such target as `make update` · Address review feedback: serialize update-files before its consumers, add managed-file he… · Changed: extract embedded Python helper scripts from Makefile.…

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Moroccan senior frontend developer writing at smakosh.com; builds side projects and client work under Smakosh LLC.

• New on @llmgateway: Adaptive Cache-Aware Provider Selection Routing learns cache-hit rates and output-to-input proportions from recent project/model usage to compare providers for large prompts and sessions. Available automatically across plans, with workload defaults before enough history exists and explicit overrides on Enterprise. Learn more

  llmgateway.io

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

• I’m seeing teams at Vercel iterate just as fast on Zig, Go, Rust projects as TypeScript & Python ones. The days of language or runtime choice based on human convenience are over. Agents are the new compilers. They compile intent into fast software.

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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.

• mf be like "it came to me in a dream" and its actually just 10 000 agent swarms writing markdown files on a sandbox and some python code

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Canadian full-stack web developer who makes JavaScript and CSS video courses and co-hosts the Syntax podcast.

• Genie Garage doors enabled caching on their API resulting in everyones garage door being shared with everyone else using the API Cache Ruins Everything Around Me
  Quoting@IAmArcIvanov@TheGenieCompany Your AlladinConnect is either breached or malfunctioning where users using API integration (in my case via HASS) are seeing garage doors of other people's accounts. The number of the devices populated by the API endpoint keeps growing as of Sept 6th 1:42 AM.

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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.

• ok everyone, i took one for the team here's the data we all wanted to see - real token value of each LLM subscription, empirically measured through usage on my real subscriptions - supergrok heavy has now become the highest value at $12k worth of tokens (40x ROI) - the $200 plan from openai and anthropic roughly give the same amount of token value, $7k give or take - cursor ultra's ROI is the lowest among mainstream subscriptions, roughly half of OAI or Ant. for individual consumers i'm afraid this no longer makes sense to purchase this was done in a clean environment. i ran each provider acr…

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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.

• instructor 1.17 is out cache isolation fixes, better Gemini retries, local PDF support, OpenAI SDK 3 compatibility, and refreshed model examples. lots of small fixes from the issues and PR backlog. thanks to everyone who sent one in

  github.com

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Programmer, photographer and musician, best known for the Python Requests HTTP library and other Python tooling.

• Making a Python interpreter in 1024 bytes

  austinhenley.com

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

• Astra for Coding: Why Are We Doing This Again?

  Python string splicing to edit C code

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Economist; former chief economist of the International Monetary Fund.

• Repetition, I am afraid, is the key to convincing.... So let me repeat (Reaction to comments about Greece and the like. ) The argument that the cancelling of the public debt by the central bank has either zero or a negative effect, the argument that I have made this week, is not an argument about debt cancellation in general. Debt (partial or full) cancellation (or restructuring, or reprofiling) of the debt held by investors is a whole different ballgame. It has big real effects. It decreases the interest rate charge, but makes it harder to issue more debt: Creditors, who just lost money, are…

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Principal engineer at Cloudflare as of 2026, on agents and developer tooling. Streams TypeScript, OCaml and Neovim on Twitch, and wrote the better-result library after writing the same Result type about a hundred times.

• put cloudflare, workers, and workers cache in front and sleep well at night
  Quoting@RhysSullivanusing github as a reference, budgeting for 10x-100x volume compounding how the hell is every service going to handle that? one option is everyone runs their own caches in front of the APIs they use, but then that becomes a data access and freshness nightmare

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Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.

• Python sets and dictionaries can have quadratic-time performance

  In Python, the dict data structure is the conventional key-value structure. E.g., you might store a list of names as keys and have their phone numbers as values. Valentin Ignatev wrote this amusing post on X: It is inde…

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Software engineer and engineering leader at Canonical, working on Ubuntu; writes about his homelab, Nix and tooling at jnsgr.uk.

• pytouchlinesl — A Python API client for Roth's TouchlineSL API

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Member of technical staff at Anthropic. He has led ML/AI teams at Amazon, Alibaba and Lazada, and writes about LLMs, recommender systems and engineering at eugeneyan.com.

• Fable 5.1 is a thoughtful collaborator, thinking hard about my requests, proactively patching my blindspots, and verifying the work's correct without being asked. And with cache reads now costing 75% less, to $0.25/M tokens, huge savings for long-running, agentic tasks!
  Quoting@claudeaiWe’re introducing Claude Fable 5.1 and Claude Mythos 5.1. They're the world’s most advanced models for coding and knowledge work.

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Web developer; former head of engineering at Flickr, author of Building Scalable Web Sites, and co-founder and CTO of Slack.

• SQLParser — Parse MySQL schemas in PHP, fast

  CommitsDon't install coveralls for non-coverage runs · Test under PHP 8.4 and 8.5 · Updating to recent versions of actions/checkout and actions/cache to silence node depreca…

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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).

• A little video that - explains the relationship between conventional LLMs and reasoning models (and agents), - philosophizes a about "from scratch" approaches, - and explains how to install Python & PyTorch requirements with uv.

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Programmer, photographer and musician, best known for the Python Requests HTTP library and other Python tooling.

• noodler — A modular music environment where theory itself is patchable. Eurorack-inspired, built in Python around PyTheory.

  Commitsfeat: add generative jazz and acid house patches · feat: add compact nested rack hierarchy · feat: add Rainlight Cathedral showcase patch

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

• http-sf — HTTP Structured Fields for Python

  Commitsrun the serialisation test suite · put editorconfig into the pyproject template

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• rfc.fyi — Browseable, searchable RFC index

  CommitsPre-cache with fetch rather than addAll of tagged Requests · Address the review · Describe the stamped cache name in CONTRIBUTING

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Writer and developer; runs Waxy.org, co-organises the XOXO festival, and was the first CTO of Kickstarter.

• Monty Python and the Holy Grail, in alphabetical order: the latest submission to Supercut.org, inspired by Of Oz The Wizard

  vimeo.com

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Cryptography engineer; maintains Go's cryptography libraries as a full-time open-source maintainer, funded directly by companies that use them.

• Production ML-DSA Verification in 350 Lines of Python

  I am publishing a production, pure-Python ML-DSA verifier. It's just 350 lines, and pretty readable and robust.

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Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.

• Memory-level parallelism: AMD is the king

  When your program asks for memory that is not in cache, the processor has to go to RAM. That trip costs on the order of 100 nanoseconds. On a 3 GHz core, that is about 300 cycles of doing nothing. Memory latency has not…

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Thai software engineer; publishes a public digital garden at garden.narze.live and builds developer and productivity tooling.

• gangprompting-slack — Slack bridge for gangprompting with a Claude Code agent

  CommitsDrop Python reference implementation, Deno bridge only · Add Slack gangprompting bridge (Deno, with Python reference impl)

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Programmer and designer who writes at tonsky.me; author of Fira Code, DataScript and AnyBar.

• clj-simple-stats — Simple statistics for Clojure/Ring webapps

  Commits1.4.0 Drop `rollup_state` · Cache DB connection between dashboard accesses · Fixed legend width

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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).

• python-machine-learning-book — The "Python Machine Learning (1st edition)" book code repository and info resource

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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.

• It's sad to see trillion dollar AI companies end the careers of course creators. David has been making Python courses for 20 years and he just called it quits. https://t.co/09rHvd17i6 I've been doing it for 10 years and I'm at an impasse. Traffic is dead, I operate at a loss.

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Programmer, photographer and musician, best known for the Python Requests HTTP library and other Python tooling.

• interpretations — A new album, written in Python.

  CommitsRefactor play runner · Update to pytheory 0.57.10; re-render all tracks and site MP3s

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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.

• the next version of Python is going to have a built in sampling profiler!!!! this is so exciting to see

  docs.python.org

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• exciting to read about this work on rv, uv has made Python so much easier for me
  Quoting@indirect.ioI wrote a history of rv until now, what we've released, and what our plans are andre.arko.net/2026/06/13/rv-…

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Technical educator, conference speaker and developer relations engineer based in Ottawa, Canada. Author of the Anubis bot filter and of over 400 articles at xeiaso.net.

• random-python-app — Ignore, this is a test of a skill

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Indian software engineer and co-founder of Skcript; builds web apps and writes at varunraj.in.

• vr-site-astro — Hosted: varunraj.in Astro TailwindCSS

  Commitsrevert: remove AI pitch builder and Cloudflare adapter · fix: cache fix · feat: astro update

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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.

• webserver — A zero dependency Python 3 web server to echo back an HTTP request's headers and data.

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Writer and consultant on formal methods and software correctness; author of Practical TLA+ and Logic for Programmers.

• People get confused when language implementations break language guarantees

  Take the following Python program: # x = 1, y = 2 x = 0 y = x print([x, y]) It'll print [0, 0]. If we swapped the two assignments, it'd instead print [0, 1]. Each assignment happens in a separate temporal step. Pretty m…

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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).

• mini-coding-agent — Minimal and readable coding agent harness implementation in Python to explain the core components of coding agents.

  coding agentsRelated

Member of technical staff at Anthropic. He has led ML/AI teams at Amazon, Alibaba and Lazada, and writes about LLMs, recommender systems and engineering at eugeneyan.com.

• yay for automatic prefix caching! just set a single cache control field at the top level of your request body. note that you do still need to structure your prompt templates to benefit from prefix caching though.

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

• microgpt

  This is a brief guide to my new art project microgpt, a single file of 200 lines of pure Python with no dependencies that trains and inferences a GPT. This file contains the full algorithmic content of what is needed: d…

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

• monthly-venmo — A Python script to automate monthly Venmo requests

  Commitschore: upgrade price to 4.40

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Scottish software developer on the Statamic core team; runs a one-person business maintaining Statamic addons such as Runway and writes at duncanmcclean.com.

• static-cache-manager — Clear your site's static cache from the Control Panel.

  Commitsno longer necessary · [4.x] PHP 8.5 compatibility (#31)

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Egyptian front-end developer and course creator; writes for CSS-Tricks, publishes courses on Udemy and blogs at alialaa.dev.

• git-cache-components — This is a Next.js project bootstrapped with create-next-app.

  CommitsUpdate next.config.ts · Initial

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Creator of the Keras deep-learning library and the ARC-AGI benchmark.

• deep-learning-with-python-notebooks — Jupyter notebooks for the code samples of the book "Deep Learning with Python"

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Independent game developer, creator of the colony simulation RimWorld and author of Designing Games: A Guide to Engineering Experiences. Previously worked on BioShock Infinite.

• A lot of the time the devs want to do the same thing again too. They are afraid to start from zero and want to extend the previous success. Or they are the kind of people who make a certain game and they can't do anything else. Narrow genius.
  Quoting@SandyofCthulhuWhy game sequels sometimes get worse. The sequence: 1) the devs make a hit game. 2) publishers want the devs to shab out more the same. 3) we want to do something new. SO, either the devs are forced to do a game they don't want, or the game license is taken away (Banjo Kazooie & Spyro the Dragon) a…

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Software engineer who writes the blog Made of Bugs about performance, debugging and understanding computer systems. Previously worked at Anthropic on interpretability, at Stripe on Sorbet, and at Ksplice.

• The ITTAGE indirect branch predictor

  While investigating the performance of the new Python 3.14 tail-calling interpreter, I learned (via this very informative comment from Sam Gross) new (to me) piece of performance trivia: Modern CPUs mostly no longer str…

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Managing partner at Ritholtz Wealth Management. Writes the blog The Irrelevant Investor and co-hosts the Animal Spirits podcast with Ben Carlson.

• There was a lot to like about the commentary from Q1 earnings season. I'm afraid we'll hear a different story next time.

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Member of technical staff at Anthropic. He has led ML/AI teams at Amazon, Alibaba and Lazada, and writes about LLMs, recommender systems and engineering at eugeneyan.com.

• Great list of what the best devs do, such as: • Read the source, docs, error msgs • Simplify problems, write simple code • Get their hands dirty • Write to share & write well • Have beginner's mind & keep learning • Not afraid to say: I don't know

  endler.dev

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Software engineer who writes the blog Made of Bugs about performance, debugging and understanding computer systems. Previously worked at Anthropic on interpretability, at Stripe on Sorbet, and at Ksplice.

• Performance of the Python 3.14 tail-call interpreter

  About a month ago, the CPython project merged a new implementation strategy for their bytecode interpreter. The initial headline results were very impressive, showing a 10-15% performance improvement on average across a…

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Co-founder and chief science officer of Hugging Face; writes about open models and where he thinks the field is wrong.

• I shared a controversial take the other day at an event and I decided to write it down in a longer format: I’m afraid AI won't give us a "compressed 21st century" Here: thomwolf.io/blog/scienti... It's an extension of this interview discussion from the AI summit:

  youtu.be

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Machine learning engineer working on recommender systems, personalization and information retrieval. Previously worked on LLMs and LLM infrastructure at Mozilla.ai and on ML and recsys at Duo, Tumblr, Automattic and Comcast; wrote the 'What are embeddings?' text and ran the Normconf conference.

• How FastAPI path operations work

  If you’re building a new Python web app these days, there’s a good chance you’re using FastAPI. There are a lot of features that make FastAPI easy to get started with. There are also a lot of nuances t…

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Game developer, formerly at Looking Glass Studios, and author of the stb single-file public-domain C libraries used across the games industry.

• wikiplot — python scripts for extracting plot summaries from wikipedia

  Commitsfix use of summary-count variable · Update README.md · initial commit

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Machine learning engineer working on recommender systems, personalization and information retrieval. Previously worked on LLMs and LLM infrastructure at Mozilla.ai and on ML and recsys at Duo, Tumblr, Automattic and Comcast; wrote the 'What are embeddings?' text and ran the Normconf conference.

• blusky — Playing with Python Bluesky SDK

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Programmer and writer; co-wrote The Rust Programming Language and worked on Rust's documentation for years.

• Against Names

  There’s an old saying: There are only two hard things in Computer Science: cache invalidation and naming things. ― Phil Karlton I also appreciate the joke version that adds “and off by one errors.” Lately, I’ve been thi…

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Writer and consultant on formal methods and software correctness; author of Practical TLA+ and Logic for Programmers.

• Toolbox languages

  A toolbox language is a programming language that’s good at solving problems without requiring third party packages. My default toolbox languages are Python and shell scripts, which you probably already know about…

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Programmer based in Vancouver who writes at scattered-thoughts.net about databases, programming language design and developer tools; author of the Imp, Dida and Zest language experiments.

• baby-2nd-bench

  CommitsFlesh out codegen examples · Leave cache alone - doesnt seem to affect compile times after changing source · Use hyperfine in bench

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Machine-learning researcher at Cursor working on post-training for coding models; a professor at Harvard and then Cornell from 2016 to 2026, and a researcher at Hugging Face from 2019 to 2024.

• PowerEdit — A super-minimal Python-based video editor ⚡

  Commitsfix timing

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Member of technical staff at Anthropic. He has led ML/AI teams at Amazon, Alibaba and Lazada, and writes about LLMs, recommender systems and engineering at eugeneyan.com.

• python-collab-template — 🛠 Python project template with unit tests, code coverage, linting, type checking, Makefile wrapper, and GitHub Actions.

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Creator of the Keras deep-learning library and the ARC-AGI benchmark.

• keras-resources — Directory of tutorials and open-source code repositories for working with Keras, the Python deep learning library

  KerasRelated

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

• I am starting a new journey where I play with LLMs while refusing to touch Python. Wish me luck, let’s see how far I can get lol

  LLMsRelated

Programmer; co-founded GitHub and was its CEO, and created the Mustache templating language and Resque.

• pystache — Mustache in Python

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

• A from-scratch tour of Bitcoin in Python

  I find blockchain fascinating because it extends open source software development to open source + state. This seems to be a genuine/exciting innovation in computing paradigms; We don’t just get to share code, we get to…

  open sourceRelated

Front-end developer and writer; co-founder of CodePen, founder of CSS-Tricks, and co-host of the ShopTalk Show podcast.

• inline-or-cache-svg---both — Let's see how possible this is.

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Creator of the Keras deep-learning library and the ARC-AGI benchmark.

• nelder-mead — Pure Python/Numpy implementation of the Nelder-Mead algorithm.

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Data scientist and machine-learning researcher; chief scientist at bitly, founder of Fast Forward Labs and Hidden Door.

• introbot — A python script to generate the text of intro e-mails.

  Commitsupdated csv reader and mac clipboard command

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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.

• PythonGettingStarted — Getting started with Python

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Software developer; created Firebug, helped create Firefox on the Netscape browser team, and built the original Facebook iPhone app.

• diskcache — Node.js cache for storing files on disk and in memory

  Commits0.0.17 · * Fix for node 0.10

  JavaScriptRelated

Software developer; created Firebug, helped create Firefox on the Netscape browser team, and built the original Facebook iPhone app.

• express-store — Express middleware for caching responses on disk or in memory.

  Commits* Changing names from cache to store (to please trademark trolls)

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