Events that trigger workflows, in logic groups and explicitly showing if they need to be in the default branch in order to trigger the workflow.

triggers.md

Legend:

• ⤴️ the event trigger only works if the workflow file is on the default branch.
• ⏺️ any of the event's activity type can trigger workflows (as opposed to selected activity types)

Grouping	Triggers       [Source]
Repository	pull_request pull_request_comment ⏺️ pull_request_review ⏺️ pull_request_review_comment pull_request_target push ⏺️ merge_group ⏺️ release ⤴️ repository_dispatch
Git	create ⤴️ delete ⤴️ ⏺️ label ⤴️ status
Issue	⤴️ ⏺️ issue_comment ⤴️ ⏺️ issues
CD	deployment deployment_status
Project	⤴️ ⏺️ milestone ⤴️ ⏺️ project ⤴️ ⏺️ project_card ⤴️ ⏺️ project_column
Security/QA	⤴️ ⏺️ branch_protection_rule ⤴️ ⏺️ check_run ⤴️ ⏺️ check_suite ⤴️ public
Community/Wiki	⤴️ ⏺️ discussion ⤴️ ⏺️ discussion_comment ⤴️ gollum ⤴️ watch ⤴️ fork
Actions	workflow_call ⤴️ workflow_dispatch ⤴️ workflow_run schedule
Pages/Registry	⤴️ page_build ⤴️ ⏺️ registry_package