Skill UI

A comprehensive guide on extending and customizing GraphQL APIs using the GraphQLSchemaFactory pattern. Learn how to add custom queries and mutations, define type definitions, and implement complex resolvers with per-request dependency injection (DI). Ideal for developers needing to inject backend services, use cases, and sophisticated business logic into their existing GraphQL schema.

This guide details the Hexagonal Architecture (Ports and Adapters) pattern, a robust method for decoupling core business logic from external infrastructure concerns. It teaches how to structure applications to make the domain model independent of databases, UI frameworks, or message queues. Implementing this pattern drastically improves testability, maintainability, and the ability to swap out external services without rewriting business rules.

This skill guides the architectural definition of complex business domains using Domain-Driven Design (DDD). It helps in defining core subdomains, separating services by bounded contexts, and establishing a unified ubiquitous language. It is essential for decomposing monoliths, structuring microservices, and aligning team ownership with clear domain boundaries.

This skill provides patterns for managing distributed transactions and long-running business processes. It helps coordinate multi-service transactions, implement compensating transactions, and handle failures in distributed systems. Suitable for building order fulfillment and approval workflows in microservices architectures.