Manual Workflow

If you would like to add workflows that users run manually, you have to create a repository for those workflows. Let's call the repository Manual Workflow Repository. You have to install GitHub App in Main Repository and Manual Workflow Repository so that workflows can access Main Repository. You also have to give users the write permission of Manual Workflow Repository, so you have to be careful the treat of this repository.

One of the usecase of this repository we assume is that users scaffold pull requests of Main Repository.

For example, tfaction provides the feature.

Scaffold working directory by GitHub Actions workflow_dispatch event

In that case, you can give GitHub App only permission to push commits to Main Repository. If GitHub App can create pull requests to Main Repository, a user can approve and merge them himself. This is risky so workflows should create only feature branches in Main Repository and let users open pull requests themselves.