Git bisect run still doesn’t (?) support —-first-parent so unless people keep every commit in merged branches passing CI, the tool is very difficult to use. I wish that feature would make it into git. Another useful feature would be to be able to specify additional code (not in the repo) to leave alone during true bisect. Usually (in my experience almost invariably) you need a new test to bisect in the past. This requires some scripting gymnastics to patch the tree after each checkout in the bisect.