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Tokens, cn(), focus rings, shadcn/ui (new-york), insert-menu groups.
How to move an app component into the headless @jasonyangcis/core-ui library — headless conversion, cross-repo file checklist, treeshake sentinel, changeset, consumer wiring.
How to wire a new Builder.io-rendered route or model — fetch helper, route, registry, config.
Pattern for adding a server Route Handler under app/api/** — origin check, zod body, server-only deps, safe responses.
Builder.io Gen-2 SDK patterns — fetch, render, register, model guard, preview.
TS strict, four-file folder pattern, import boundaries, no console.
Secret hygiene, CSP, CSRF, webhook HMAC, session encryption.
| name | design-system |
| description | Tokens, cn(), focus rings, shadcn/ui (new-york), insert-menu groups. |
bg-card, text-muted-foreground, …). No hardcoded hex.cn() from @/utils/cn.focus-visible:ring-[3px] focus-visible:ring-ring/50.[data-theme] in styles/tokens.css and expose via @theme inline in app/globals.css.utils/register-insert-menu.ts.Long-form: see docs/skills/design-system.md.