Deck Kit — The Design System Learns to Present

Extend a finished design system with a presentation layer: spec the slide masters into deck-kit/DECKKIT.md (seeded from a bundled standard master catalog, trimmed per FOUNDATION.md), write each theme's deck.css bridge mapping reveal.js's --r-* vars onto the theme's --ds-* tokens, build every master across every theme via slide-smith workers into per-theme sample decks, and gate with deck-check plus a deck-critic rendering pass. Trigger whenever the user wants the design system to cover presentations/slides — "make a deck kit", "add slide masters to the design system", "I want to build presentations in our design language", or /deck-kit. Requires FOUNDATION.md and at least…