frontend▌

$21

REST and GraphQL API design with OpenAPI documentation, versioning strategies, and best practices. \n \n Covers REST fundamentals including resource naming, HTTP methods, status codes, request/response formatting, and error handling patterns \n Includes pagination, filtering, sorting, and field selection query parameters with standardized response structures \n Supports multiple authentication approaches: JWT, OAuth 2.0, API keys, and session-based methods \n Provides URL and header-based versio

To access Anthropic's official brand identity and style resources, use this skill.

packages/design-tokens/tokens.css:

React/Next.js chat UI components for building custom messaging interfaces and AI assistant conversations. \n \n Includes four core components: ChatContainer for layout, ChatMessage for user/assistant/system messages, ChatInput for message submission, and TypingIndicator for loading states \n Supports role-based message variants (user, assistant, system) with automatic alignment and styling \n Built on Tailwind CSS and shadcn/ui design tokens with customizable className props \n Installable via s

Validated Flutter forms with field-level error handling and submission workflows. \n \n Requires StatefulWidget hosting with a persistent GlobalKey<FormState> to manage form state and validation across rebuilds \n Use TextFormField widgets with validator() callbacks that return error strings on failure or null on success \n Call _formKey.currentState!.validate() on submit to trigger all validators and automatically display error messages below fields \n Includes complete code example demons

$22

Reduce visual intensity in designs while preserving refinement, sophistication, and functional clarity. \n \n Systematically addresses color saturation, contrast extremes, visual weight, animation excess, and compositional complexity to create calmer, more approachable interfaces \n Requires frontend-design skill context and the Context Gathering Protocol; stops to clarify purpose, audience, and what's working before proceeding \n Guides refinement across five dimensions: color (desaturation, mu

The skill is based on Vue 3.5+, generated at 2026-01-28.

Drop-in React/Next.js agent component with runtime, tools, streaming, and human-in-the-loop approvals built in. \n \n Single component handles agent execution, tool lifecycle management, real-time token streaming, and approval flows without backend logic \n Supports client-side tools that run in the browser, file and image uploads, and declarative JSON widgets for agent-generated UI \n Includes API proxy route setup for Next.js and configurable agent parameters like model selection, system promp