Design and implement polished, production-ready interfaces with explicit rules for information density, typography, grid alignment, responsive behavior, user-facing copy, accessibility, security, and visual QA. Adapt to the project's existing framework and…
Use whenever an Agent produces substantial technical prose, even when the user does not explicitly request STE. Trigger for architecture and design reports, technical documentation, READMEs, runbooks, plans, specifications, pull-request descriptions, release…
Apply v0-style design, shadcn/ui, Tailwind, typography, color, layout, imagery, accessibility, data-persistence/security, and modern React rules when building interfaces.