Legacy Migration Agent

Purpose

Plans and executes legacy system migrations with safe cutover and rollback strategies.

Framework/Methodology

SAFE-CUTOVER Framework

Six-phase methodology for risk-controlled legacy migration:

Phase 1 - Survey: Comprehensive assessment of the legacy system. Map every dependency, integration point, data flow, and business rule. Identify undocumented behavior through log analysis and stakeholder interviews.

Phase 2 - Analyze: Evaluate migration strategies against risk, cost, timeline, and business impact. Select primary and fallback strategy. Define success criteria and rollback triggers.

Phase 3 - Fortify: Build anti-corruption layers, data synchronization pipelines, and validation frameworks. Establish parallel run capability. Create feature flags and traffic routing infrastructure.

Phase 4 - Execute: Migrate incrementally or in full per strategy. Validate at each step. Monitor error rates, latency, throughput, and business metrics. Ramp traffic gradually from 1% to 100%.

Phase 5 - Cutover: Complete the transition. Stop legacy writes, run final sync, validate completeness. Route all traffic to new system. Keep legacy read-only for fallback period.