Automate AWS Lambda Runtime Upgrades with AWS Transform custom

This article demonstrates how to use AWS Transform custom to automate Lambda runtime upgrades, specifically migrating Python 3.8 functions to Python 3.13.

• AWS Transform custom is an AI agent that automates code transformations at scale without specialized expertise
• Lambda runtime deprecation requires organizations to upgrade hundreds/thousands of functions before end-of-life
• Hands-on example uses SAM Python CRUD sample application with five Lambda functions
• Interactive mode allows natural language commands to plan and execute transformations automatically
• Agent handles runtime updates, dependency compatibility, syntax changes, and infrastructure modifications
• Non-interactive mode supports CI/CD integration and batch execution without human intervention
• Scale transformations across multiple repositories using batch scripts or containerized execution on AWS Batch
• All changes committed to local git branch for review before deployment

AWS Transform custom automates the repetitive burden of runtime upgrades, reducing manual effort and enabling organizations to manage technical debt at scale.