Architecture Patterns

Master proven backend architecture patterns including Clean Architecture, Hexagonal Architecture, and Domain-Driven Design to build maintainable, testable, and scalable systems.

Use this skill when

• Designing new backend systems from scratch

• Refactoring monolithic applications for better maintainability

• Establishing architecture standards for your team

• Migrating from tightly coupled to loosely coupled architectures

• Implementing domain-driven design principles

• Creating testable and mockable codebases

• Planning microservices decomposition

Do not use this skill when

• You only need small, localized refactors

• The system is primarily frontend with no backend architecture changes

• You need implementation details without architectural design

Instructions

• Clarify domain boundaries, constraints, and scalability targets.

• Select an architecture pattern that fits the domain complexity.

• Define module boundaries, interfaces, and dependency rules.

• Provide migration steps and validation checks.

Refer to resources/implementation-playbook.md for detailed patterns, checklists, and templates.

Resources

• resources/implementation-playbook.md for detailed patterns, checklists, and templates.