Private.Review_modeSourceReview_mode.t describes the context in which CR assignment and annotation logic is executed. This is not strictly tied to the CI event that triggered the workflow, but rather to the review/assignment semantics:
Pull_request: The workflow is running in the context of a pull request, and the author is the user who opened the PR.Commit: The workflow is running in the context of a commit to a branch (e.g., main), and there is no specific PR author.