[
    {
        "type": "feature",
        "category": "core",
        "description": "The SDK will now automatically provide a version 4 UUID for top-level operation parameters that are modeled with the `idempotencyToken` flag. Users may continue to provide their own tokens."
    },
    {
        "type": "feature",
        "category": "S3",
        "description": "Updates the AWS.S3 API to the latest version."
    }
]