Legacy Modernizer
Skill Verified ActiveDesigns incremental migration strategies, identifies service boundaries, produces dependency maps and migration roadmaps, and generates API facade designs for aging codebases. Use when modernizing legacy systems, implementing strangler fig pattern or branch by abstraction, decomposing monoliths, upgrading frameworks or languages, or reducing technical debt without disrupting business operations.
To guide users through the complex process of modernizing legacy systems with structured strategies and actionable code examples, minimizing disruption and technical debt.
Features
- Designs incremental migration strategies
- Identifies service boundaries
- Produces dependency maps and migration roadmaps
- Generates API facade designs
- Provides detailed reference guides for key patterns
Use Cases
- Modernizing legacy systems
- Implementing strangler fig pattern
- Decomposing monoliths
- Upgrading frameworks or languages
- Reducing technical debt without disrupting business operations
Non-Goals
- Performing 'big bang' rewrites
- Skipping testing of legacy behavior before changes
- Deploying without rollback capability
- Breaking existing integrations or APIs
Workflow
- Assess system
- Plan migration
- Build safety net
- Migrate incrementally
- Validate & iterate
Practices
- Incremental Migration
- Refactoring
- Testing Strategies
- Service Extraction
Installation
First, add the marketplace
/plugin marketplace add jeffallan/claude-skills/plugin install claude-skills@fullstack-dev-skillsQuality Score
VerifiedSimilar Extensions
V3 Ddd Architecture
100Domain-Driven Design architecture for claude-flow v3. Implements modular, bounded context architecture with clean separation of concerns and microkernel pattern.
Pathfinder
100Map a codebase into feature-grouped flowcharts, identify duplicated concerns across features, and propose a unified architecture. Use when asked to "find the ideal path," unify duplicated systems, or audit architecture before a refactor. Emits a proposed unified flowchart plus per-system /make-plan prompts.
Cloud Architect
100Designs cloud architectures, creates migration plans, generates cost optimization recommendations, and produces disaster recovery strategies across AWS, Azure, and GCP. Use when designing cloud architectures, planning migrations, or optimizing multi-cloud deployments. Invoke for Well-Architected Framework, cost optimization, disaster recovery, landing zones, security architecture, serverless design.
Adapt Architecture
98Execute structural metamorphosis using strangler fig migration, chrysalis phases, and interface preservation. Covers transformation planning, parallel running, progressive cutover, rollback design, and post-metamorphosis stabilization for system architecture evolution. Use when assess-form has classified the system as READY for transformation, when migrating from monolith to microservices, when replacing a core subsystem while dependents continue operating, or when any architectural change must be gradual rather than big-bang.
Understand
100Analyze a codebase to produce an interactive knowledge graph for understanding architecture, components, and relationships
API Design Patterns
100Comprehensive API design patterns covering REST, GraphQL, gRPC, versioning, authentication, and modern API best practices