It turns out GenAI code changes are causing serious incidents and outages at Amazon with "high blast radius" https://arstechnica.com/ai/2026/03/after-outages-amazon-to-make-senior-engineers-sign-off-on-ai-assisted-changes/

Junior / middle engineers no longer allowed to push GenAI code to production without senior engineer review

(HT @KimPerales )

EDIT: Better link above than before. Old one is here:
https://www.ft.com/content/7cab4ec7-4712-4137-b602-119a44f771de

After outages, Amazon to make senior engineers sign off on AI-assisted changes

AWS has suffered at least two incidents linked to the use of AI coding assistants.

Ars Technica

@cwebber

Just have senior engineers write all the code. Probably easier than reviewing AI code.

If that gets to be too much work, just declare that everyone is now a senior engineer.

@richpuchalsky @cwebber

Ask a ai to write a program in any language ( cobol, java , python , c,…) which divide two inputted numbers. All of them check if the second number is 0 to avoid a division by zero but NONE checks if the inputted strings are numbers . And this is a basic control .

#ai