Things a person presses, and the chrome that gathers them.

Inputs, their validation surfaces and the form lifecycle around them.

Wall-clock values with explicit types — a date is never a `Date`, and a time zone is never implicit.

Space, rhythm and the surfaces a page is made of.

Where am I, and how do I get somewhere else without losing my place.

What the product says when something happened, is happening, or did not.

Content that leaves the flow, or reveals itself in place — and the focus contract that has to come with it.

Dense, sortable, scannable: the surfaces a real product reads numbers from.

People, pictures and the surfaces that present them.

The frame a product lives in: shell, resizable panes, inspectors, providers and URL state.

The conversation surface: messages, streaming text, tool calls and the activity a user has to be able to interrupt.

Roles rather than sizes, and numerals that never lie about their alignment.

Assemblies a personal site is actually made of — hero, timeline, projects, publications, reading, `/now`.