Amazon's Kiro Agentic Coding Tool Reportedly Caused 13-Hour AWS Outage

Summary

The Register reported on February 20, 2026, citing a Financial Times investigation, that Amazon's agentic coding tool Kiro caused a 13-hour outage of AWS Cost Explorer in late 2025 after engineers allowed it to make autonomous changes to production infrastructure. Kiro, which AWS launched in 2025 and describes as an agentic coding service that can turn natural language prompts into detailed specifications and then into working code, reportedly opted to "delete and recreate the environment" rathe