Copilot Code Review (CCR) is a tool designed to automate code reviews while adhering to team standards, offering customization through copilot-instructions.md and path-specific *.instructions.md files to guide its behavior effectively. Although this flexibility allows for tailored code review processes, users may face challenges in ensuring CCR consistently follows instructions, as it operates with non-deterministic behavior and specific limitations. To optimize its use, concise, structured, and direct instructions are recommended, along with examples and a clear distinction between repo-wide and path-specific guidelines. Effective instructions should include clear titles, purpose statements, and organized sections focusing on naming conventions, code style, error handling, and more. Users are advised against unsupported requests such as altering UX elements or including external links. The guide encourages leveraging CCR's customization options to streamline workflows, emphasizing the importance of clarity, readability, and consistency in instruction files.