cloudformation-cli (cfn-cli)

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library 0.2.39 ·python
verified May 9, 2026

CloudFormation CLI (cfn-cli) is the official AWS tool for building, testing, and publishing AWS CloudFormation resource type providers, modules, and hooks. The current version is 0.2.39. It allows developers to create custom CloudFormation resource types using Java or Python, run contract tests, and submit them to the CloudFormation registry. The release cadence is irregular, with 3-4 minor releases per year.

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