AWS launches Emulator for agents to test code against local AWS
Original title: AWS Emulator and the engineer's job when agents write the code
Amazon says the tool is meant to stand in for more than 200 services that are too numerous to mock by hand.
Amazon CTO Werner Vogels published a guest post by Swami Sivasubramanian announcing AWS Emulator, a local copy of AWS for coding agents to test against. The post ties the release to earlier simulation of Alf, an internal Paxos-based lock service used by systems such as S3 and DynamoDB. AWS says it now has over 200 services and that agents write code faster than teams can validate it in production. The described method uses public Smithy API models and the live AWS cloud as a fidelity check.
- The post is dated November 11, 2026.
- Alf used Paxos and a replication engine for strongly consistent locks.
- The agent-built emulator idea is attributed to Matt Goldberg.
- The published text cuts off while describing fidelity tests.
- Vendors
- Amazon
- Products
- AWS Emulator
- Organizations
- AWS
From the original article
7 min read at allthingsdistributed.com
In 2004, barely a month into my new job at Amazon, I got the opportunity to pick an intern to join my team. I had an advantage over my colleagues: I had already heard about a brilliant young man working toward his PhD at the Vrije Universiteit in Amsterdam (where I happened to have received mine as well :-)). I immediately picked Swaminathan Sivasubramanian, whom you all now know as Swami.
By drbm · allthingsdistributed.com
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