| name | framework-migration-legacy-modernize |
| description | Orchestrate a comprehensive legacy system modernization using the strangler fig pattern, enabling gradual replacement of outdated components while maintaining continuous business operations through ex |
| type | skill |
| created | 2026-02-27T00:00:00.000Z |
| domain | software-development |
| category | database |
| risk | unknown |
| source | community |
| tags | ["skill","software-development","database","framework","migration","legacy"] |
Legacy Code Modernization Workflow
Orchestrate a comprehensive legacy system modernization using the strangler fig pattern, enabling gradual replacement of outdated components while maintaining continuous business operations through expert agent coordination.
[Extended thinking: The strangler fig pattern, named after the tropical fig tree that gradually envelops and replaces its host, represents the gold standard for risk-managed legacy modernization. This workflow implements a systematic approach where new functionality gradually replaces legacy components, allowing both systems to coexist during transition. By orchestrating specialized agents for assessment, testing, security, and implementation, we ensure each migration phase is validated before proceeding, minimizing disruption while maximizing modernization velocity.]
Use this skill when
- Working on legacy code modernization workflow tasks or workflows
- Needing guidance, best practices, or checklists for legacy code modernization workflow
Do not use this skill when
- The task is unrelated to legacy code modernization workflow
- You need a different domain or tool outside this scope
Instructions
- Clarify goals, constraints, and required inputs.
- Apply relevant best practices and validate outcomes.
- Provide actionable steps and verification.
- If detailed examples are required, open
resources/implementation-playbook.md.
Phase 1: Legacy Assessment and Risk Analysis
1. Comprehensive Legacy System Analysis
- Use Task tool with subagent_type="legacy-modernizer"
- Prompt: "Analyze the legacy codebase at $ARGUMENTS. Document technical debt inventory including: outdated dependencies, deprecated APIs, security vulnerabilities, performance bottlenecks, and architectural anti-patterns. Generate a modernization readiness report with component complexity scores (1-10), dependency mapping, and database coupling analysis. Identify quick wins vs complex refactoring targets."
- Expected output: Detailed assessment report with risk matrix and modernization priorities
2. Dependency and Integration Mapping
- Use Task tool with subagent_type="architect-review"
- Prompt: "Based on the legacy assessment report, create a comprehensive dependency graph showing: internal module dependencies, external service integrations, shared database schemas, and cross-system data flows. Identify integration points that will require facade patterns or adapter layers during migration. Highlight circular dependencies and tight coupling that need resolution."
- Context from previous: Legacy assessment report, component complexity scores
- Expected output: Visual dependency map and integration point catalog
