The Problem

I run a production SaaS on AWS Lambda (Python 3.12, 7 source files, boto3 + MCP dependencies). All functions on x86_64. AWS Graviton2 offers 20% cheaper duration charges — but switching without

verifying ARM64 compatibility is risky.

The manual audit process:

Check every pip dependency for native C extensions

Verify no inline assembly or architecture-specific intrinsics

Confirm container base images support linux/arm64

Cross-reference AWS docs for runtime support

For a small codebase, this takes a few hours. For larger projects with numpy, pandas, or compiled extensions — days.

The Setup: Kiro Web + Graviton Migration Power

Kiro Web is AWS's agentic IDE in public preview.…