I'm trying to find a way to block commiters from making a review.
Lets say that I have 3 users: usera, userb, userc. Usera pushes code to the git repo, some git hooks tell fisheye to scan repo, fisheye notices it, scans repo, shows commit and crucible only lets userb and userc create review. Usera can only become observer of this review.
Is it possible without plugin development?
It looks like you're looking for permission scheme feature. You probably want to allow
userc to create reviews and
usera to view it,