Browse Skills

Expert guidance for designing production-grade Zod schemas with TypeScript type inference, schema composition, error handling, and full-stack integration patterns.

Identifies code smells and applies systematic refactoring patterns from Martin Fowler's catalog. Guides safe refactoring with test coverage, legacy code strategies, and incremental improvement plans that preserve behavior while improving design.

Builds WCAG 2.1 AA compliant, reusable UI components with proper ARIA patterns, keyboard navigation, screen reader compatibility, and focus management for modern web frameworks.

Design, author, and maintain operational runbooks that enable on-call engineers to diagnose and resolve incidents faster with structured response procedures, escalation frameworks, and toil reduction strategies.

Comprehensive Supabase guidance covering PostgreSQL database, authentication, Row Level Security, real-time subscriptions, storage, Edge Functions, and client SDK for building full-stack applications.

Conducts thorough, constructive code reviews focusing on readability, maintainability, security, performance, and SOLID principles. Delivers actionable feedback organized by severity.

Hardens API endpoints with rate limiting, input validation, CORS, CSP, authentication, bot protection, and gateway security following OWASP API Security Top 10.

Design and implement controlled failure injection tests for API dependencies to validate system resilience, graceful degradation, and recovery mechanisms before production incidents occur.

Expert advisor for React state management — helps you choose between Zustand, Jotai, Redux Toolkit, Context API, and XState based on your application's specific requirements. Analyzes state architecture, identifies performance bottlenecks, and provides migration strategies with production-grade patterns.

Comprehensive TypeScript guidance covering type system, generics, utility types, strict mode, type narrowing, declaration files, migration from JavaScript, and advanced patterns for writing type-safe applications.

Comprehensive React guidance covering hooks, component patterns, state management, performance optimization, testing, and modern best practices for building maintainable user interfaces.

Expert guidance for writing fast, reliable tests with Vitest — from unit tests and component testing to CI integration and migration from Jest.

Build production-grade React Native e-commerce apps with Stripe payments, deep linking, push notifications, and mobile-optimized checkout flows that maximize conversion rates.

Design, review, and govern OpenAPI 3.x specifications for production APIs. Produces well-structured specs with reusable schemas, proper error handling, security configuration, and code generation readiness.

Build automated accessibility testing pipelines that catch WCAG violations in CI/CD, combining axe-core, Playwright, and Lighthouse for continuous compliance monitoring.

Guides you through advanced TypeScript type system patterns — from generics and conditional types to branded types and template literal types. Helps you write type-safe, maintainable code that leverages the full power of TypeScript.

Expert advisor for API lifecycle management — versioning strategies, deprecation policies, backward compatibility, breaking change detection, and migration guides. Helps you evolve APIs without breaking consumers.

Comprehensive API design guidance covering REST, GraphQL, gRPC, WebSocket APIs, versioning strategies, authentication patterns, rate limiting, documentation, and developer experience for building APIs that developers love.

Designs comprehensive database backup and disaster recovery strategies including RPO/RTO targets, backup rotation schemes, cross-region replication, point-in-time recovery, and automated restore testing.

Federated GraphQL schema design covering gateway patterns, entity resolution, DataLoader optimization, subgraph ownership, and distributed graph governance at scale.

Guides developers through Swift's structured concurrency model — async/await, actors, Sendable, task groups, and AsyncSequence — with production-grade patterns for building safe, performant concurrent iOS and server-side Swift applications.

Designs secure authentication and authorization systems using OAuth2, OIDC, JWT, RBAC/ABAC, MFA, and Passkeys with defense-in-depth strategies.

Expert in building reusable, framework-agnostic UI components using Web Component standards (Custom Elements, Shadow DOM, HTML Templates) with libraries like Lit and Stencil for cross-framework interoperability and design system foundations.

Ethereum and EVM smart contract development with deep gas optimization, security-first patterns, and audit preparation. Solidity 0.8+, Foundry and Hardhat tooling, OpenZeppelin building blocks. The focus is production-grade contracts that survive adversarial environments, not tutorials.