Web prototype

Skill nexu-io/open-design/plugins/_official/examples/web-prototype

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Install

npx -y skills add nexu-io/open-design --skill web-prototype

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

What its author says it does

Copied from the file, not written here

General-purpose desktop web prototype. Single self-contained HTML file built by copying the seed `assets/template.html` and pasting section layouts from `references/layouts.md`. Default for any landing / marketing / docs / SaaS page when no more specific skill matches.

SKILL.md

4.6 KB, as published. Nobody here has run it

Web Prototype Skill

Produce a single, self-contained HTML prototype using the bundled seed and layout library — not by writing CSS from scratch. The seed already encodes good defaults (typography, spacing, accent budget). Your job is to compose it.

Resource map

web-prototype/
├── SKILL.md                ← you're reading this
├── assets/
│   └── template.html       ← seed: tokens + class system + chrome (READ FIRST)
└── references/
    ├── layouts.md          ← 8 paste-ready section skeletons
    └── checklist.md        ← P0/P1/P2 self-review

Workflow

Step 0 — Pre-flight (do this once before writing anything)

Read assets/template.html end-to-end — at minimum through the <style> block. The class inventory at the top of references/layouts.md lists every class that must be defined there; if one is missing, add it to <style> rather than re-defining it inline on every section.
Read references/layouts.md so you know which section skeletons exist. Don't write a section type that isn't covered — pick the closest layout and adapt.
Read the active DESIGN.md (already injected into your system prompt). Map its colors to the six :root variables in the seed; don't introduce new tokens.

Step 1 — Prepare the artifact from the seed

Choose one kebab-case artifact slug before composing the page. Use assets/template.html as the seed for the final artifact HTML.

Do not write a project-root HTML draft with file-write before emitting the final <artifact>. The live-artifact output is the canonical HTML file for this generation turn; an extra index.html, cast.html, or brief-derived draft can be stranded beside it as an orphan.

Replace the six :root variables with the active design system's tokens. Replace the page <title> and the topnav brand.

Step 2 — Plan the section list

Pick layouts before writing copy. Default rhythms (from layouts.md):

Page kind	Default rhythm
Landing	1 hero → 3 features → 4 stats or 5 quote → custom split → 6 cta
Marketing / editorial	1 hero-center → 7 log list → 6 cta
Pricing	1 hero-center → 8 comparison table → 6 cta
Docs index	1 hero-center → 7 log list (sections of docs) → 6 cta

State the chosen list in one sentence to the user before writing — they can redirect cheaply now and not after 200 lines of HTML.

Step 3 — Paste and fill

For each chosen layout, copy the <section> block from layouts.md into <main id="content"> of the artifact HTML. Replace bracketed [REPLACE] strings with real, specific copy from the user's brief. No filler — if a slot is empty, the section is the wrong choice; pick a different layout.

Step 4 — Self-check

Run through references/checklist.md top to bottom. Every P0 item must pass before you move on. P1 items should pass; P2 are bonus.

Step 5 — Emit the artifact

Wrap the completed HTML in <artifact> tags using the artifact slug as the identifier. One sentence before describing what's there. Stop after </artifact>.

Hard rules (the seed protects most of these — don't fight it)

Single accent, used at most twice per screen. Eyebrow + primary CTA is the default budget.
Display font is serif (Iowan Old Style / Charter / Georgia in the seed). Sans for body. Mono for numerics, captions, eyebrows.
Image placeholders, not external URLs. Use the .ph-img class — never link to a stock photo CDN.
Mobile reflow already works via the seed's media query at 920px. Don't break it by adding fixed widths.
data-od-id on every <section> so comment mode can target it.

Output contract

<artifact identifier="kebab-case-slug" type="text/html" title="Human Title">
<!doctype html>
<html>...</html>
</artifact>

Open Design derives the canonical HTML artifact from this identifier. Do not also write another root HTML file for the same generation turn.

One sentence before the artifact. Nothing after.