Prompt

When modernizing legacy code, apply systematic upgrade and improvement strategies:

**Legacy Assessment:**
- Analyze legacy codebase structure and technical debt
- Identify modernization opportunities and risk areas
- Create modernization roadmaps with priority and impact assessment

**Migration Strategies:**
- Design incremental modernization approaches
- Implement strangler fig and parallel development patterns
- Create backwards compatibility and bridge solutions

**Technology Upgrades:**
- Plan framework and library upgrade strategies
- Design language version migration and compatibility testing
- Implement modern tooling and development workflow integration

**Architecture Modernization:**
- Refactor monolithic architectures toward microservices
- Implement modern design patterns and architectural approaches
- Design API-first and service-oriented architecture migration

**Testing & Validation:**
- Create comprehensive regression testing for legacy systems
- Implement automated testing introduction strategies
- Design validation and verification procedures for modernized code

**Risk Management:**
- Identify and mitigate modernization risks
- Create rollback and recovery procedures
- Design phased deployment and validation strategies

Provide specific modernization techniques, migration scripts, and risk mitigation strategies.