Simple Deck Skill

Produce a single-file horizontal-swipe HTML deck using the seed and layout library.

Resource map

simple-deck/
├── SKILL.md                ← you're reading this
├── assets/
│   └── template.html       ← seed: tokens + slide primitives + proven nav script (READ FIRST)
└── references/
    ├── layouts.md          ← 8 paste-ready slide layouts + theme-rhythm rules
    └── checklist.md        ← P0/P1/P2 self-review (rhythm spot-check at bottom)

Workflow

Step 0 — Pre-flight

1. Read assets/template.html end-to-end through the <style> block AND the <script> block. The script solves five iframe-specific bugs (real scroller detection, dual capture-phase listeners, auto-focus, no scrollIntoView, position persistence) — do not rewrite it.
2. Read references/layouts.md so you know the 8 layouts. Pay special attention to the "Theme rhythm" section — it's the rule that prevents the deck from feeling sleepy.
3. Read the active DESIGN.md — map its tokens to the six :root variables in the seed.

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>.

Step 2 — Decide slide count + theme rhythm BEFORE writing any slide

Default: 6 slides unless the brief says otherwise.

Audience / format	Slides
Product overview / lightning talk (5–10 min)	6
Pitch deck (15 min)	8–10
Investor update / longer talk (20–30 min)	12–18

Then write out the rhythm before any HTML — for example, 8 slides:

01  hero light center  Cover
02  light              Problem
03  hero dark center   Big stat
04  light              Three points
05  dark               Pipeline
06  hero light center  Quote
07  light              Before / after
08  hero dark center   Ask

A healthy sequence has:

• No 3+ same theme in a row
• ≥ 1 hero dark AND ≥ 1 hero light (for 8+ slides)
• Alternating breath every 3–4 slides

Show this rhythm sketch to the user before writing slide HTML — they can redirect cheaply.

Step 3 — Paste and fill

For each planned slide, copy the matching <section> from layouts.md into the body. Replace bracketed text with real, specific copy. No filler / no lorem. If a slide feels empty, the layout is wrong — pick a different one.

Tag each slide with data-screen-label="01 Cover", "02 Problem", etc., in the order you wrote them. (The seed's first three slides already do this — extend the pattern.)

Step 4 — Self-check

Run through references/checklist.md. The "Theme rhythm spot-check" at the end is non-negotiable:

grep 'class="slide' index.html

Read the resulting class list. If you see light × 4 in a row, swap one to dark. If no hero dark exists in an 8+ slide deck, promote one big-stat or closing slide.

Step 5 — Write the project file

Write the completed deck HTML to index.html.

Then send one short ordinary assistant summary naming index.html and describing the deck. Do not output the full HTML source in chat and do not emit a source-code <artifact> block.

Hard rules

• Theme class on every slide (light | dark | hero light | hero dark). Bare class="slide" = regression.
• No 3+ same theme in a row.
• Display = serif via var(--font-display). .h-hero / .h-xl / .h-md already enforce.
• One accent per slide, used at most twice.
• Don't rewrite the nav script. It's proven.
• No scrollIntoView(). Breaks iframe.
• data-screen-label on every slide.