OptionalackSet when another thanks-only merged PR in the same repo was merged more recently: one acknowledgment on that PR covers this one too, so the workflow should not draft a separate reply here.
Commits by someone other than the user pushed after the user's last commit.
Oldest first.
Heuristic: every note reads as thanks or praise (keyword, no question, short, no change-related wording) and nobody pushed on top. The workflow confirms this with the comment-decision classification before acting on it; see groupThanksOnlyAcknowledgments.
A merged PR with at least one maintainer note the user has not answered.