DDD Legacy Refactoring & Migration
Refactors complex legacy systems into modular, domain-driven architectures using strategic patterns like Strangler Fig and Bubble Context.
This skill provides a comprehensive framework for transforming monolithic legacy codebases into modern systems guided by Domain-Driven Design (DDD). It bridges the gap between high-level architectural strategy (identifying where and why to refactor) and tactical execution (executing the code changes). By leveraging structured phases—from stabilization and modularization to event-driven communication and microservices extraction—it enables developers to modernize technical debt incrementally while maintaining system stability through characterization testing and automated fitness functions.
Key Features
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02Risk Assessment Framework (Cynefin Mapping & Business Value Analysis)
03Infrastructure Patterns (Database Splitting, Event-Based Sync)
04Strategic Migration Patterns (Strangler Fig, Bubble Context, ACL)
05Tactical DDD Refactoring (Primitive Obsession, Model Enrichment)
064-Phase Incremental Monolith-to-Microservices Roadmap
Use Cases
01Isolating a core domain within a 'Bubble Context' to protect new logic from legacy corruption.
02Executing a safe database migration using the Expand/Contract pattern for microservices readiness.
03Decomposing a tangled monolith into clear Bounded Contexts to improve team velocity.