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Wed, October 15, 2025

AWS SAM CLI Adds Finch Support for Local Development

🔧 AWS Serverless Application Model CLI (SAM CLI) now supports Finch as an alternative to Docker for local container-based development and testing. Developers can continue to build, test, debug, and package serverless applications locally using the same SAM CLI workflows, including sam build, sam local invoke, sam local start-api, and sam local start-lambda. SAM CLI will automatically detect and use Finch when Docker is not available, and you can also set Finch explicitly as your preferred container tool. Finch is an open-source, AWS-supported project that offers an additional choice for local serverless tooling.

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