Agent Skills: stitch-ui-prompt-architect

Build Stitch-ready prompts from vague UI ideas (Path A) or from a Design Spec plus user request (Path B). Use when polishing a UI prompt before Stitch generation, improving a prompt that produced poor results, or merging a Design Spec with framework contracts (uView, Element Plus, Layui, Bootstrap, Vant) into a sectioned Context/Layout/Components prompt.