What is the Systemone Hugo theme?

A Hugo theme for editorial sites written as hand-written plain CSS, with no build step, no webfonts and no JavaScript required to read a site. Its visual language abstracts the editorial style of typesafe.ai and the community OpenJev site.

How does the theme relate to Jev or System One?

Its design was developed by studying typesafe.ai, home of TypeSafe AI's Jev and System One decision model, and openjev.com, and the project name is a nod to System One. The theme itself never calls Jev, and the README states it is not affiliated with TypeSafe AI or OpenJev.

How do I install Systemone in a Hugo site?

Add it as a Hugo module by importing github.com/zetxek/systemone in hugo.toml, or use a git submodule under themes/systemone and set theme to systemone. No npm install is needed, and exampleSite is a working demo site.

Does the theme need a build step or runtime dependencies?

No. The README says the theme ships zero runtime dependencies and no build step: no Sass, PostCSS, Tailwind or Node pipeline, no webfonts, no icon fonts, and no JavaScript needed to read the site.

What appearance options does it offer?

Auto, light and dark. Readers can cycle the three from a header button persisted in localStorage, or you can pin design.appearance site-wide, turn the toggle off with features.appearanceToggle, and override accents with design.lime and design.pink.

How do I run the demo site locally?

From the repository, run hugo server --source exampleSite --themesDir ../..; the README documents this single command, and a hosted demo also runs at systemone-demo.vercel.app.

What is the theme's current status?

Stage 2 at its 2026-09-20 push: the token set, base CSS, home, single, list, 404, taxonomy and term templates, RSS and the light-dark appearance system work. Post cards, table of contents, code and table components, shortcodes, render hooks and the image pipeline are still to come.

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Systemone (Hugo theme)

A Hugo theme that abstracts the editorial look of typesafe.ai and the community OpenJev site into hand-written CSS with no build step, webfonts or runtime dependencies. It is an independent design homage named after System One and does not call Jev.

See highlights Open github.com

Stars: 0
Language: CSS
License: MIT
Reading time: 3 min
Published by: Community
Author: zetxek
Last verified: Oct 2026

zetxek/systemone

User repository on GitHub

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Editorial neubrutalism for Hugo — oversized tightly-tracked display type, mono utility text, square geometry, thin ink rules, hard offset shadows on warm paper. Hand-written CSS, zero build step, zero runtime deps, zero webfonts.

Forks: 0
Last pushed: Updated Sep 2026

Repo stats from the GitHub API, cached Oct 2026.Homepage

Tagscommunity github hugo css theme

Works forJev for Document processing

Used inJev for Software & DevTools

Capabilities: Open source

Highlights

Hand-written plain CSS for Hugo: no Sass, PostCSS, Tailwind or Node build step, and no webfonts, icon fonts or JavaScript needed to read a site.
Its visual language abstracts typesafe.ai, home of TypeSafe's Jev and System One model, and the community OpenJev site; the name is a nod to System One.
Ships a full dark appearance verified against WCAG AA in both appearances, with an auto/light/dark toggle persisted in localStorage.
Install as a Hugo module (github.com/zetxek/systemone) or a git submodule; the demo exampleSite runs with hugo server --source exampleSite --themesDir ../..
MIT licensed, stage 2 at the 2026-09-20 push: tokens, base CSS, templates, RSS and the appearance system exist; post cards and shortcodes are still to come.

Quickstart

bash

hugo server --source exampleSite --themesDir ../..

Watch out

README reviewed 2026-10-17 from the round-eleven capture. The theme is an independent design homage: its README states it is not affiliated with, endorsed by or connected to TypeSafe AI or the OpenJev project, and it contains no Jev integration.

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Systemone (Hugo theme)

Highlights

Quickstart

Questions about this entry

What is the Systemone Hugo theme?

How does the theme relate to Jev or System One?

How do I install Systemone in a Hugo site?

Does the theme need a build step or runtime dependencies?

What appearance options does it offer?

How do I run the demo site locally?

What is the theme's current status?

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