How to Swap a Document-Extraction Adapter Without Redeploying the App

Custom Queries adapters on Amazon Textract extend its document extraction by fine-tuning it for specific document types, improving accuracy on forms with unusual layouts. The engineering problem arrives later: once such an adapter is in production, how do you point the application at a new version without shipping new code? The approach described in the AWS write-up is to externalize adapter IDs into AWS Systems Manager Parameter Store. Production adapter references can then be updated with zero downtime and no application redeployment — a change that once took hours or days of coordination taking seconds instead.