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Co-creator of Django and creator of Datasette; writes daily at simonwillison.net.

• usgs-demo — https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_hour.geojson

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Co-creator of Django and creator of Datasette; writes daily at simonwillison.net.

• datasette-auth-github 1.0

  Release: datasette-auth-github 1.0 I run this GitHub login plugin on the agent.datasette.io demo site and I noticed that my authenticated sessions weren't lasting very long. It turned out that the plugin was setting coo…

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Co-founder and CTO of Oxide Computer Company. Created DTrace at Sun Microsystems and was CTO of Joyent; blogs about systems software, open source and engineering culture.

• New @oxide.computer swag just arrived, and... hot damn

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Web standards author and speaker; wrote the CSS: The Definitive Guide series and co-founded the An Event Apart conference.

• I made this floating-scrollbar #CSS demo as the result of a discussion we had in today’s Front-End Study Hall: https://codepen.io/editor/meyerweb/pen/01a0b0bd-0100-750d-8c24-745f6318896d I don’t know if it’s actually a good idea to do something like this (probably not), and it has a few styling limitations (no drop shadows or glows), but it was interesting to try to hit a design brief with clipping paths and the relatively new `shape()` value.

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Programmer, teacher and speaker; long-time Microsoft developer-community figure, host of the Hanselminutes podcast and author of the hanselman.com blog.

• New repoOscAppTasksDemo — Packaged WinUI demo bridging standard OSC agent output to real Windows Shell App Tasks

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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.

• New week new demo! Today I want to showcase the CLI to control the @superlogical multiplexer. The CLI is an extremely powerful tool for automation and hooking into other tools like editors, agentic coding tools, and more. And, it's super fun! Everything you can do in the GUI, you can do via the CLI. Actually, you can do more in the CLI. You can create sessions, run commands, make splits, move things around, change focus, simulate any input device (key/mouse/etc.), wait on scripts, and more. There are a couple unique parts of Rex I'm showing off here too: our streaming event system that any cl…

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Co-founder and CTO of Oxide Computer Company. Created DTrace at Sun Microsystems and was CTO of Joyent; blogs about systems software, open source and engineering culture.

• Another week at @oxide.computer has given us (yet) another example of the kinds of problems that very much require human engineering. Today, the team joins @ahl.bsky.social and me to regale us with the wild tale. Join us live, 5p Pacific, tonight!

  discord.gg

  Quoting@bcantrill.bsky.socialI am surely not alone in having family over the weekend hitting me up asking "should I be worried about extinction?" As a response, I have found that my anti-Doomer talk from @monktoberfest.com 2023 (three very long years ago!) remains current and accessible: www.youtube.com/watch?v=bQfJ...

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Developer, author and YouTuber covering Raspberry Pi, homelab hardware and Ansible automation. Author of Ansible for DevOps.

• If you're at VCF Midwest, come all the way to the back corner and check out my NTP Time demo on a bunch of old Macs! (Starring an Xserve G5 with an acrylic cover). Also check out Mr. Macintosh's rack full 'o Xserves across the pod! #vcfmw

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Developer, author and YouTuber covering Raspberry Pi, homelab hardware and Ansible automation. Author of Ansible for DevOps.

• I'm outta time! I'm packing for VCF Midwest today, but did finish up the last three projects for my NTP Time demo on old Macs: Xserve G5, Mac SE/30, and iBook G3 Clamshell (over AirPort Wi-Fi!). #vcfmw Also a bonus look at AppleTalk-based time transfer:

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Co-founder and CTO of Oxide Computer Company. Created DTrace at Sun Microsystems and was CTO of Joyent; blogs about systems software, open source and engineering culture.

• Slides from my keynote this morning at #RustConf on the history of Rust at @oxide.computer; video to come!

  speakerdeck.com

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Canadian software developer and writer, co-editor of the XML and Atom specifications and formerly of Sun Microsystems, Google and AWS. Has written the blog ongoing since 2003.

• RE: https://mastodon.social/@bcantrill/117220486316266236 Bryan makes important points, then veers into a convincing Pangram testimonial. Oxide is now requiring public statements to be Pangram-negative. #clankerslop

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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).

• Reasoning from scratch round 2: In this video, I cover the text generation process in LLMs and KV caching (to prepare the base model before adding reasoning techniques in the upcoming ones). 00:00 Introduction and reasoning model demo 01:55 How to work through the book 05:00 Chapter 2 overview 08:25 Checking PyTorch and hardware support 10:26 Apple silicon and MPS caveats 15:00 Cloud GPU options 16:08 Tokens and tokenization 18:20 Qwen3 and the Reasoning From Scratch package 23:05 Encoding and decoding text 26:24 Downloading weights and selecting a device 31:01 Loading the pretrained Qwen3 mo…

  LLMsRelated

Belgian engineering lead, Microsoft MVP and public speaker. Creator of Front Matter, a headless CMS extension for Visual Studio Code.

• vscode-demo-time — A Visual Studio Code extension to help you script your demos

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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.

• it's under appreciated how good photo editing is today thanks to AI: remove these people. demo using @reve app

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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.

• Talk Your Book: Cash Was Easy...Now What?

  Sponsored Meet YCharts Live at Future Proof Festival See how YCharts helps enhance every stage of a client relationship. Join our session on building client confidence through effective visuals, get a demo and 20% off Y…

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Co-founder and CTO of Oxide Computer Company. Created DTrace at Sun Microsystems and was CTO of Joyent; blogs about systems software, open source and engineering culture.

• Stoked to announce that @max.pangram.com, co-founder and CEO of @pangram.com, will be joining @ahl.bsky.social and me on the next episode of Oxide and Friends to pick up the hot (and important!) topic of AI detection. Join us, Monday, 5p Pacific!

  discord.gg

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Developer, author and YouTuber covering Raspberry Pi, homelab hardware and Ansible automation. Author of Ansible for DevOps.

• Before NTP there were Time and Daytime

  In building an NTP time demo on old Macs for VCF Midwest, I came across RFC 867 and RFC 868, for the 'Daytime' and 'Time' Protocols, respectively. My first exposure to any form of network time was when I upgraded from a…

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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.

• Quick Superlogical demo to end the week. This demo is just of the basic functionality, but I want to highlight just how FAST it is. There's a WHOLE lot more functionality already present and coming but I wanted to keep the demo short. But seriously, check out that speed. I'm showing the macOS app here and I get asked a lot so let me just say up front: its not macOS only. We're still figuring out exactly what platforms will be stable enough for the initial public release, but we're working on others. In particular, the web interface is very functional but I'll demo that another time (or someon…

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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.

• The Compound and Friends: The Four Horsemen of the AI Apocalypse

  Sponsored Meet YCharts Live at Future Proof Festival See how YCharts helps enhance every stage of a client relationship. Join our session on building client confidence through effective visuals, get a demo and 20% off Y…

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Belgian engineering lead, Microsoft MVP and public speaker. Creator of Front Matter, a headless CMS extension for Visual Studio Code.

• vscode-demo-time-theme — A vibrant and modern VS Code theme inspired by the colors of Demo Time - the ultimate tool for creating presentations and demos straight in your editor.

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Co-founder and CTO of Oxide Computer Company. Created DTrace at Sun Microsystems and was CTO of Joyent; blogs about systems software, open source and engineering culture.

• "Out, damned slop! Out, I say!" -- Lady Macbeth if she were reviewing Oxide candidate materials, maybe

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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.

• Animal Spirits: Are Free Markets Dead?

  Sponsored Meet YCharts Live at Future Proof Festival See how YCharts helps enhance every stage of a client relationship. Join our session on building client confidence through effective visuals, get a demo and 20% off Y…

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Belgian engineering lead, Microsoft MVP and public speaker. Creator of Front Matter, a headless CMS extension for Visual Studio Code.

• Demo Time 2.3.0 is out. The big one: you can now record a demo. Hit record, do your thing: create a file, type, save, and it writes the moves for you. Also in: typing that varies its speed so it doesn't look robotic, and move-to-scene in the act editor.

  demotime.show

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Indonesian software engineer, educator and engineering manager at Zero One Group; open-source enthusiast writing at ripandis.com.

• gpui-demo — Experimental and exploration project to learn GPUI.

  Commitsfeat(ui): refactor button component and relocate theme module · initial commit

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British software developer at Laravel and creator of the Cachet open-source status page system. Podcaster; writes at james.brooks.page.

• cloud-demo

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Interactive fiction author and hacker; wrote Spider and Web and Hadean Lands, and designed the Glulx virtual machine.

• BlueskyMore details about Cyan's cancelled (but nothing is ever *completely* cancelled) "Project Anglerfish”. Adam Morgan got to see the demo while writing a Wired article.

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• MastodonMore details about Cyan's cancelled (but nothing is ever *completely* cancelled) "Project Anglerfish”. Adam Morgan got to see the demo while writing a Wired article.

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

• eve-demo-agent — An Eve demo agent: a content formatter that splits work between exact typed tools and a Docker sandbox — text/image measurement, chat uploads, any-direction image conversion, and fil…

  Commitsdocs: security note before exposing the demo · docs: record the reasoning-visibility dead end in agent.ts · feat: content formatter — text/image tools, uploads, downloads, streaming UI

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Swiss full-stack developer working mostly with Laravel and Vue; author of the widely used git-auto-commit-action GitHub Action.

• git-auto-commit-action-demo-app — A demo application to test git-auto-commit Github Action

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Italian software architect working on Microsoft 365, Azure and GitHub tooling. Microsoft MVP and GitHub Star; writes, speaks and streams about developer productivity at emanuelebartolesi.com.

• demo-workflow-syntax — Demo repository for basic GitHub Actions workflow syntax.

  CommitsInitial commit

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

• sass-starter-demo — This is a starter template for building a SaaS application using Next.js with support for authentication, Stripe integration for payments, and a dashboard for logged-in users.

  Commitsts error

  SaaSRelated

Writes Stratechery, a subscription newsletter on the business and strategy of technology, and hosts the Dithering and Sharp Tech podcasts.

• It's actually super important that the Siri demo was kind of slow, because it emphasized it was real. Would be even better if it were live, though.

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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.

• I added a ~90 minute demo video of using DotFriedRice. It covers configuring and installing it too. It's a niri / Arch desktop environment with modern CLI tools. The CLI set up works on any Debian / Arch based distro (WSL 2 included) and macOS!

  github.com

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Indian software developer and prolific blogger on PHP, Laravel and JavaScript; open-source enthusiast publishing near-daily at amitmerchant.com.

• antigravity-playground — A demo for Take Off with Antigravity Workshop

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Co-founder and CTO of Honeycomb; previously an infrastructure engineer at Parse, Facebook and Linden Lab, and co-author of Observability Engineering.

• If you ever wondered who can shit talk the most shit the fastest, @bcantrill or me, here is your chance to find out. (What you can't see: I'm wearing an "0x Engineer" t-shirt by Oxide as we record 😍)
  Quoting@heavybitOn episode 89 of @o11ycast, Ken Rimple and Charity Majors (@mipsytipsy) sit down with Bryan Cantrill (@bcantrill) of @oxidecomputer. They explore Oxide’s mission to bring cloud-like infrastructure to on-prem environments and unpack why owning hardware is making a comeback. Tune in!

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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.

• Making a Polished TUI Demo Video Without a Video Editor

  Recording, mocking, and polishing a terminal demo with off-the-shelf tools

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Software engineer who worked on Chrome and Polymer at Google, and writes about the web, emoji and Elm at meowni.ca.

• album-roulette — Listen to albums you haven't heard in years

  Commitsffs · Update README.md · fix demo data for reals

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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.

• g9jax — Check it out at g9-jaxjs

  CommitsTune demo regularization, tree branch rotation, and dragon depth (#33) · Separate shape opt from affects (#31) · Move drag options under affects.opt (#30)

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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.

• dcmake: a new CMake debugger UI

  CMake has a --debugger mode since 3.27 (July 2023), allowing software to manipulate it interactively through the Debugger Adaptor Protocol (DAP), an HTTP-like protocol passing JSON messages. Debugger front-ends can star…

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

• how-is-this-not-illegal — A demo of using RSC and Vercel Postgres, legally

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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.

• air-demo

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Creator of the Zig programming language; president and lead developer of the Zig Software Foundation.

• Zig's New Async I/O (Text Version)

  In celebration of the std.Io introduction patchset landing today, here is the text version of a short, interactive demo I gave at Zigtoberfest 2025. This is a preview of the new async I/O primitives that will be availab…

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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.

• rooms-and-mazes — Animated demo code for a random dungeon generator

  CommitsFix extra connections between regions. · Basically rewrite it and redo the art. · Fix bug where doors would sometimes be placed next to each other.

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Game designer and director of the NYU Game Center; made Universal Paperclips and writes Donkeyspace.

• Q-UP

  , the new game I’ve been working on, now has a free demo.

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Austrian developer. Created the libGDX game framework, and more recently the pi coding agent, which moved with them to Earendil — Armin Ronacher's company — in April 2026. Writes at mariozechner.at.

• Patching Claude Code for debugging and /cost support for Max users

  cc-antidebug patches Claude Code to enable Node.js debugger support for SDK-based apps and restores the /cost command functionality for Max plan users

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Computer performance engineer working on datacenter performance at OpenAI, previously Netflix and Sun/Joyent. Author of Systems Performance and BPF Performance Tools, and creator of flame graphs.

• New blog post: Doom GPU Flame Graphs, a fun demo of AI/GPU Flame Graphs and FlameScope, now open source

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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.

• [Past weekends side project] A quick introduction to contextual speech models I made some interactive visualisations to explain a bit better how recent contextual speech models and audio tokenization work (e.g. Sesame's demo).

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Software engineer working on distributed systems and databases; creator of rqlite, the distributed database built on SQLite.

• rqlite now supports loadable SQLite extensions - check out release 8.27, and the demo of rqlite running sqlean from @ohmypy and sqlite-vec from @agarcia_me .

  philipotoole.com

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Programmer and entrepreneur; co-founded GitHub and created Jekyll, Gravatar and the Semantic Versioning spec.

• gollum-demo — Gollum test repo

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Creator of Claude Code at Anthropic.

• json-schema-to-typescript-browser — Browser demo for json-schema-to-typescript

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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.

• zig-honggfuzz — Demo of how to use honggfuzz for coverage-guided persistent fuzzing of zig programs.

  CommitsSplit main into different file to avoid linker conflict · README · Fuzzing

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

• genui-demo

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

• next-demo — This is a Next.js project bootstrapped with create-next-app.

  Commitshh · try error · added husky

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

• tla-graphing-demo — A demo of analyzing a TLA+ state graph

  CommitsAdd gephi readme · Add some info on PRISM · Add more detail about networkx

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Software engineer at PlanetScale and creator of the vim-go plugin. Writes at arslan.io about Go, tooling, industrial design and books.

• twirpdemo — An example repository of using the Twirp RPC framework with Go

  CommitsAdd demo code · Initial commit

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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.

• site_demo

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