Options for a contribution: the commit message, save ContributeMode, and (PR mode) an optional branch name.
Optional
Override the generated branch name (PR mode).
The commit message / PR title.
'pr' (default) opens a PR; 'direct' commits to the branch and needs the first-party contribute:direct capability.
'pr'
'direct'
contribute:direct
Options for a contribution: the commit message, save ContributeMode, and (PR mode) an optional branch name.