react-app-scaffold-and-runtime

Use when creating, modernizing, or production-hardening a standalone React SPA after frontend architecture is approved or intentionally deferred. Produces a production-ready app shell with Vite (or Webpack) project layout, environment and profile handling, top-level and route-level error boundaries, a structured logging client, RUM and error-reporting wiring, the auth provider/wrapper baseline downstream skills extend, CSP and security-header posture via host config, and container or static-CDN packaging. Do not use for routing topology, rendering strategy, state or data-fetching wiring, design-system integration, performance budgeting, or SSR/meta-framework scaffolding; use the other react archetype skills or the nextjs stack instead.