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Found 145 Skills
Grounding an assistant in your app with assistant-ui copilots (@assistant-ui/react). Use when steering assistant behavior with useAssistantInstructions, feeding lazy app-state context via useAssistantContext({ getContext }), exposing rendered components with makeAssistantVisible(Component, { clickable, editable }), building two-way interactable state with useAssistantInteractable and Interactables(), or registering instructions and tools imperatively through useAui().modelContext().register({ getModelContext }). Reach for this when the assistant should read the current page, click or edit UI, or read and update component state through auto-generated update_{name} tools. For LLM tools and tool-call UI use the tools skill; for runtime and thread state use the runtime skill.
Zod 4 schema validation patterns. Trigger: When creating or updating Zod v4 schemas for validation/parsing (forms, request payloads, adapters), including v3 -> v4 migration patterns.
React 19 patterns and breaking changes vs React 18. Trigger: When writing React 19 components/hooks in .tsx (ref as prop, new hooks, Actions, deprecations). If using Next.js App Router/Server Actions, also use nextjs-15.
Implement Recur checkout flows including embedded, modal, and redirect modes. Use when adding payment buttons, checkout forms, subscription purchase flows, or when user mentions "checkout", "結帳", "付款按鈕", "embedded checkout".
Use when setting up Bknd SDK in a frontend application. Covers Api class initialization, token storage, auth state handling, React integration with BkndBrowserApp and useApp hook, framework-specific setup (Vite, Next.js, standalone), and TypeScript type registration.
Skill for integrating Autumn - the billing and entitlements layer over Stripe.
Expert in Zod — TypeScript-first schema validation. Covers parsing, custom errors, refinements, type inference, and integration with React Hook Form, Next.js, and tRPC.
This skill should be used when the user asks to "create a state machine", "add xState", "use xState with React", "implement actor-based state", "manage complex state with state machines", "use xState with Effect", "integrate Effect-ts with xState", mentions xState hooks (useMachine, useActor, useSelector), or discusses finite state machines in React applications.
Build prediction market frontends with the Context React SDK
Avoid unnecessary useEffect in React components. Most uses of useEffect are anti-patterns — derived state, event-driven logic, data fetching, and external store subscriptions all have better, more idiomatic alternatives. Apply this skill when writing or reviewing React components that use useEffect.
Rules and patterns for building React forms with React Hook Form (RHF) and Zod validation. Use this skill whenever the user is creating, editing, or refactoring any React form — including login forms, registration flows, multi-step wizards, dynamic field arrays, or any input component wired to RHF. Also trigger when the user mentions `useForm`, `Controller`, `zodResolver`, `z.object`, schema validation, form state, `useFieldArray`, or `FormProvider`. Trigger even if they just ask "how do I validate this field" or "how do I handle server errors in a form" — this skill covers it all.
React 18/19 patterns including hooks discipline, server/client component boundaries, Suspense + error boundaries, form actions, data fetching, state management decision trees, and accessibility-first composition. Use when writing or reviewing React components.