v1.0.0 Full-Spectrum Design Patterns

Design Patterns Release Notes

v1.0.0 (2026-03-04)

Added

• 4D Process: Detect → Diagnose → Design → Deliver — systematic codebase analysis and refactoring
• Iron Laws — "No Pattern Without Pain", "Evidence Before Elegance", "Incremental Over Revolutionary"
• HARD-GATE enforcement — mandatory codebase scan with file:line evidence before any pattern proposal
• Complexity Scoring — 4-dimension Health Score (/20) per module (Size, Coupling, Cohesion, Testability)
• 3-Scale Pattern Selection Matrix:
  • Code-Level: 23 GoF Patterns (Creational, Structural, Behavioral) + 5 SOLID Principles
  • Architecture-Level: Service Layer, Repository, Clean Architecture, Hexagonal, DDD, CQRS
  • System-Level: Microservices, Event-Driven, Circuit Breaker, Saga, API Gateway, Bulkhead, Sidecar, Strangler Fig
• Framework-Specific Implementations:
  • Next.js (App Router, Server Components, Server Actions)
  • FastAPI (Depends() DI, Pydantic, Background Tasks)
  • NestJS (Modules, Guards, Interceptors, built-in CQRS)
  • Django (Service Layer beyond MTV)
  • Express (Middleware Chain of Responsibility)
  • Go (Interface-based DI, cmd/internal structure)
• Anti-Pattern Detection — God Object, Logic Leakage, Tight Coupling, Shotgun Surgery, Feature Envy, Primitive Obsession
• Code Generation — production-ready boilerplate per framework
• Migration Paths — step-by-step guides: Monolith → Service Layer → Clean Architecture → Microservices
• Red Flags — checklist to prevent over-engineering and pattern abuse
• /design-patterns slash command — works with Claude Code, Cursor, Codex, OpenCode
• Plugin manifests — Claude Code (.claude-plugin/), Cursor (.cursor-plugin/)
• Install guides — Codex (.codex/INSTALL.md), OpenCode (.opencode/INSTALL.md)