Why AWS Built an Emulator to Give Coding Agents a Local Feedback Loop

<p>If you have ever tried pointing an autonomous coding agent at an AWS backend, you have probably watched it thrash. Deploying a test stack to a cloud sandbox to check if an SQS visibility timeout works or if a DynamoDB conditional write fails takes 45 to 120 seconds per cycle. The agent burns through context polling status endpoints, runs up token bills, and loses its reasoning chain while waiti

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