create-themelisted

# Create a slide theme This skill produces a **theme bundle** under `themes/`: two paired files that together describe a reusable visual identity. 1. `themes/<id>.md` — agent-facing documentation: palette, typography, layout, fixed Title/Footer/Eyebrow components, motion. This is what `create-slide` reads when an author picks the theme. 2. `themes/<id>.demo.tsx` — a runnable mini-slide (a normal slide module: `export default Page[]`) that demonstrates the theme on 2–3 pages. The dev UI's **Themes panel** loads this file and renders it as the theme's live preview. Both files share the same stem so the runtime can pair them automatically. A theme is **distinct from a slide's `design` const**. The theme markdown is authoring-time aesthetic direction (copied into a real slide's source by `create-slide`). The demo `.tsx` is a self-contained preview, not a real slide — it does not appear in the slides list. A per-slide `const design: DesignSystem = { … }` (declared at the top of `slides/<id>/index.tsx`) is the runtime tokens object the user can tweak from the Design panel. The markdown commits the *direction*; the per-slide `design` const makes the slide *tweakable*; the demo `.tsx` makes the theme *previewable*. You only write files under `themes/<id>.md` and `themes/<id>.demo.tsx`. Never modify real slides or other configuration. The canvas / type-scale defaults that themes can override live in the **`slide-authoring`** skill — read it before writing the theme so your overri