Architecture Patterns

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.
• For workflows that must survive failures (payments, order fulfillment, multi-step processes), use durable execution at the infrastructure layer — frameworks like DBOS persist workflow state, providing crash recovery without adding architectural complexity.

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

Related Skills

Works well with: event-sourcing-architect, saga-orchestration, workflow-automation, dbos-*

Resources

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

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.