October 2026: This post was reviewed and updated for accuracy
Scaling cloud migrations with agentic AI on Amazon Bedrock AgentCore raises a practical question. Which parts of a large migration program belong to a managed service, and which parts need custom automation? One enterprise program answered that question across 300+ applications and a fixed fiscal year deadline. The four-agent pattern in this post reduced infrastructure as code (IaC) development time from 3 to 4 weeks per application to minutes, based on internal project tracking data
This pattern runs alongside AWS Transform rather than in place of it, as a hybrid that adds custom agents where your program requires them. AWS Transform covers the migration and modernization work, and AWS Database Migration Service (AWS DMS) covers the database tier. The agents in this post attach to those services and carry one further requirement: sources and destinations reached through Model Context Protocol (MCP) tools that your organization builds and maintains
