When to use it
Use prototype when layout, theme, or page hierarchy is not settled. It is a pre-build helper outside the feature loop.
Outputs
Prototype writes static HTML and CSS under prototypes/. All pages share a theme-variable file so an approved direction can be ported consistently into the application.
Review before code
The skill proposes a page and visual plan before writing mockups. Once approved, prototypes become design references for feature specs.
Disposable by design
Prototype markup is not production application code. Implementation extracts components, semantic structure, responsive behavior, and real content instead of copying a large static file into a route.