Ask HN: Code of Conducts for Workplace Repos?

I work at a place that has a toxic code review process and I’m wondering what some workplace code of conducts might look like on internal repos. Much obliged if anyone is willing to share - I’m trying to propose one across all of our repos because we have a good work environment, but it gets hijacked by couple of people who troll everyone’s code. Several people have left because of one or two people alone, and before I do too I want to suggest a change.