Sidenotes positioned in the margin with CSS anchor positioning, without JavaScript. On narrow viewports and older browsers, they fall back below...

This interactive online hacker app will let you simulate that you’re hacking a computer or a digital network.

Fullscreen shaders, compute pipelines, raw WebGPU interop, and read-only source files compiled directly by this docs app.

Afraid of loosing your job to someone with little programming skills, no aspirations to quality, and a huge Claude account?

Earlier this year, I believed planning was going to become the most important part of building software with AI.

The engineer who missed meetings, answered Slack when they felt like it, and audibly sighed when you asked them to write something down.

The mined materials in a mobile phone, and which countries produced each of them in 2025, from U.S. Geological Survey data.

As AI makes it easier to build, how do we keep products from becoming generic “zombie UI”?

Modern CSS features that replace Sass, PostCSS plugins and JavaScript hacks.

Arc is the greatest web browser ever, and has been tragically moved-on-from by The Browser Company of New York-come-Atlassian.

Rebuild with Xcode 27.1, then let size, Split View, the fold, and system controls decide how your app uses the extra space on iPhone Duo.

Dearly beloved, we are gathered here today to bury the software engineer.

A 3D tour of the U.S. $100 bill, plus 15 design and security feature groups explained.

A bot that crawled YouTube and found 5 million of raw, unedited videos.

The pervasiveness of tools may have implanted the wrong instinct in our heads in a world of AI.

A giant isometric pixel-art map of New York City. And an excuse to push hard on the limits of the latest and greatest coding agents.

Building a little piece of it involved Claude, 4,096 colors, and a surprisingly difficult pair of legs.

A browser-based optimizer for categorical color palettes.

A lightweight library full of beautiful loading indicators for React.

With AI tooling, code being the source of truth just makes sense.

Open-source animated pets for coding agents. Browse pets, preview their animations, and install one with a single command.

AI-agent power users curate 3 kinds of context: global (across tasks), local (task-specific), and ambient (raw streams like email).

Convert images to ASCII art locally in your browser. No upload, no signup. Copy ASCII or export TXT, PNG, SVG, and Markdown.

A practical guide to auditing what your coding agent still needs.

A self certification process with a somewhat official blessing.

The Anthropic Economics Team models the effects of AI on the economy of 2030.

Filler cells for CSS grids with borders.

The case for a nature model that learns the state and dynamics of the planet itself.