Delete all SSM parameters starting with /XYZ:
aws ssm get-parameters-by-path --path /XYZ --recursive --query 'Parameters[].[Name]' --output text | xargs -n1 -IParam aws ssm delete-parameter --name Param
Delete all SSM parameters starting with /XYZ:
aws ssm get-parameters-by-path --path /XYZ --recursive --query 'Parameters[].[Name]' --output text | xargs -n1 -IParam aws ssm delete-parameter --name Param