Remove any CodePipeline Trigger that autostart the execution

For CodeCommit and Amazon S3 Source actions, you are not able to disable change detection through the CodePipeline APIs, SDK, or Terraform. You could manually modify/remove the CloudWatch Events Rule that is created in the EventBridge Console, please only take this course of action if you understand the implications and take a backup.

For GitHub (Version 2) Source actions, you are able to disable change detection by editing the Source configurationProperties and setting DetectChanges to false.

As an alternative, you could add a Manual Approval action to a new Stage following your Source stage. See: AWS documentation on adding a manual approval step.

For Terraform, here is some sample HCL code:

stage {
  name = "Approve"

  action {
    name     = "Approval"
    category = "Approval"
    owner    = "AWS"
    provider = "Manual"
    version  = "1"

    configuration {
    }
  }
}