Full-stack development patterns for the Better-T-Stack setup. Use this skill whenever working on any project in this stack — adding a feature, creating a route, building a form, writing a procedure, defining a schema, scaffolding a new package, reviewing code, or writing tests. Triggers on: new feature, new page, new form, new route, new endpoint, new procedure, new table, new package, new component, new hook, build a component, write a test, add a test, vitest, testing, test setup, better-auth plugin, auth plugin, custom plugin, oRPC, TanStack, better-auth, Drizzle, Hono, Expo, React 19, shadcn, monorepo, Turborepo, or any coding task in this stack.