The public preview of a HashiCorp Vault AWS Lambda extension has been announced, allowing developers to securely retrieve secrets from HashiCorp Vault without having to make their Lambda functions Vault-aware. The extension utilizes the newly announced AWS Lambda Extensions API and retrieves the specified secret from a Vault cluster before presenting it to the Lambda function. This makes it easy for operators to manage their secrets and provide them to developers to use within their application code, streamlining the process of securely storing and retrieving credentials for Lambda functions. The extension can be integrated with AWS CloudWatch, X-Ray, Config, and CloudTrail, providing a simple way to extend the execution environment of Lambda functions.