AWS Releases AWS Emulator: Providing a Local AWS Testing Environment for Coding Agents

AWS has released AWS Emulator, providing coding agents with a locally runnable, offline copy of AWS for testing, with the code released under CC0. The tool was written and tested by agents, based on more than 400 API models covering over 200 AWS services, and agents ensure correctness through fidelity tests validated against real AWS and merge gates containing multiple security agents. The article also documents the experience of rebuilding the Alf replication engine with Kiro: when specifications and a testing environment were lacking, it was supervised for four evenings; once these were completed, the rebuild took about two hours.