How to Successfully Migrate Your App with an AI Agent

Most app migration failures stem from poor prompting rather than AI limitations, requiring a strategic approach similar to how humans tackle complex codebases. A developer successfully migrated a legacy LLM credit system from separate React/Express repositories into unified Next.js by using systematic context-building, scope definition, verification through browser inspection tools, and task decomposition. The key breakthrough involved enabling the AI agent to "see" the running application and systematically recreate functionality rather than attempting everything in one command.