create-design-doc

Scaffold and iteratively build a typst-based technical design doc — the kind that lives next to a project, evolves with the author's understanding, and renders to a PDF via `typst watch`. Use when the user asks to "start a new design doc", "create a typst design doc", "scaffold a design doc", or similar. This skill is a styling guide, not a project template — it does NOT prescribe sections (no defaulting to "Frontend/Backend/Workflow" or "Metrics/Tables/Services"); it derives the document's structure from the actual project. Walks the user through a short Q&A (project, source material), proposes a project-specific structure, writes a minimal compileable starter, and then collaborates on detail pages turn-by-turn. Enforces a consistent house style: New Computer Modern body, banded booktabs-style tables, accent-blue underlined links (with optional per-category color extensions), soft amber warning callouts (`warning-box`), blue "+" diff callouts and row markers (`new-box` / `new-marker`) for flagging changes, and an invariant divider page between main content and detail references that includes a reading tip about Cmd/Ctrl-clicking links to open them in new tabs.