|. Use when you need help with web prototype.
Scanned 9/8/2026
Install to Claude Code
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---
name: web-prototype
description: |. Use when you need help with web prototype.
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.
license: CC-BY-NC-SA-4.0
triggers:
- "prototype"
- "mockup"
- "landing"
- "single page"
- "marketing page"
- "homepage"
od:
mode: prototype
platform: desktop
scenario: design
preview:
type: html
entry: index.html
design_system:
requires: true
sections: [color, typography, layout, components]
---
# 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)
1. **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.
2. **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.
3. **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 — Copy the seed
Copy `assets/template.html` to the project root as `index.html`. 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 your `index.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 `index.html` in `<artifact>` tags. 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>
```
One sentence before the artifact. Nothing after.
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