Amazon says AWS Emulator is available for download, that autonomous agents wrote every line, and that the team has not reviewed the code.
Amazon says it released AWS Emulator on November 11, a local emulator of AWS services that a person can run on their own machine to build and test applications. It says the emulator is available for download, and that autonomous agents wrote every line of the code.
Amazon says people did not review the code. Matthew Goldberg, a senior principal engineer, writes that the team has not written or reviewed any of the code. Amazon says thousands of autonomous agents write tests, find issues, and fix code without human review. The source is on GitHub under a CC0 license, and Amazon says it is constantly updated.
The project started as a weekend test of one queue service. Goldberg says he gave Kiro a prompt to write tests from the AWS command-line tool, run them against real AWS, and then build an in-memory version that passed the same tests. He says Kiro returned a first version of Amazon Simple Queue Service in 15 minutes. He then had it build the rest over a weekend. The team started using that version to test its own software the following Monday.
Three agent groups now maintain the tests and the fixes. Amazon says one group manages a test suite, one raised an untested hypothesis about differences from real AWS, and one fixes those differences. It says the tests are checked against the live cloud before they are submitted, and that there are tens of thousands of them. The first generated repository was an empty web server that could take requests for 438 AWS API models and did nothing with them. Amazon says the tests are the guardrail that tells the agents when the emulator matches the cloud.
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