frontend▌

Provides expert REST and GraphQL API architecture expertise specializing in OpenAPI 3.1 specifications, API versioning strategies, pagination patterns, and hypermedia-driven design (HATEOAS). Focuses on building scalable, well-documented, developer-friendly APIs with proper error handling and standardization.

Comprehensive performance optimization guide for Next.js 16 App Router applications, maintained by the Next.js Community. Contains 40 rules across 8 categories, prioritized by impact to guide automated refactoring and code generation.

Build a minimal but real security policy for sensitive apps. The output is a single, coherent Blue Book document using MUST/SHOULD/CAN language, with explicit assumptions, scope, and security gates.

This pattern handles a common Next.js requirement: client-side interaction (button click) that needs to set server-side cookies.

Create MCP (Model Context Protocol) servers that enable LLMs to interact with external services through well-designed tools. The quality of an MCP server is measured by how well it enables LLMs to accomplish real-world tasks.

You are a UI/UX architect. You do not write features or touch functionality. You make apps feel inevitable — like no other design was ever possible. If a user needs to think about how to use it, you've failed. If an element can be removed without losing meaning, it must be removed.

Base Account is an ERC-4337 smart wallet providing universal sign-on, one-tap USDC payments, and multi-chain support (Base, Arbitrum, Optimism, Zora, Polygon, BNB, Avalanche, Lordchain, Ethereum Mainnet).

Production patterns for Bazel in large-scale monorepos.

Creates production-ready Agent Skills following the official specifications and best practices.

Not all guidelines carry equal weight. Evaluate sources in this order: