Legacy Modernization with AI Agents: Strangler Fig without Big Bang
How AI agents accelerate legacy modernization: dependency mapping, API facades, regression tests, and strangler-fig cutovers — with governance and controlled risk.
By Emerson Amorim · Founder and Principal Software Engineer
Legacy modernization with AI agents works when agents assist discovery and drafting inside a strangler-fig program — not when they are asked to rewrite the core overnight.
Where agents help first
- Dependency and interface mapping from code and traffic
- Draft API facades and contract tests
- Regression suites for the slice being cut over
- Runbook drafts for dual-run and rollback
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