ff-merge lets you do git merge --ff-only on GitHub.

ff-merge supports events that (1) contains "issue" field with non-empty "pull_request" field, (2) contains "pull_request" field.

Notable events:

• pull_request: Seelabeled example.
• issue_comment: Only when the comment is from PR. See example.

Name	Type	Choices	Default	Description
merge	string	"true", "false"	"false"	Whether to merge the branch immediately.
comment	string	"never", "failure", "always"	"always"	Determines if it should leave a comment.
allowed-roles	list of string	"read", "triage", "write", "maintain", "admin", $custom_role	[]	Required role(s) for triggering_actor to trigger fast-forward. Example: ["read", "write"]
GITHUB_TOKEN	string	Your PAT or auto-provided token	${{ github.token }}	Token used to authenticate

See oneee-playground/gh-fast-forward-test.