designer

Preview server — download, start, stop, and control the design preview with live reload at port 3000

Color palette management — generate standard YAML palettes from built-in library, external search, URL extraction, or traditional Chinese colors

Manage design-spec.css — match resource library, handle medium differentiation (web/app/poster), auto-learn from completed projects

Font management — list, install, remove, and recommend fonts from 11 seed typefaces + Google Fonts

Manage global design conventions — .conventions.yml for fonts, viewport, CSS rules, HTML rules, images, and typography defaults

Create and manage HTML pages from design templates — web, app, and poster mediums

Create and manage design project structure — project.yml, directory layout, and medium separation (web/app/poster)

Guide the user through design project planning — collect requirements, match design library, output DESIGN.md blueprint