I’ve been a longtime advocate of pull request templates. These templates allow you to provide instructions to developers creating pull requests in your repos so that they will be reminded to include all the relevant information you need to properly review their code. Pull request templates are a great place to include checklists as additional reminders. These might include to-dos like remembering to write unit tests, self-reviewing your code, or doing a security audit.
Sometimes though, these checklists can get long. You may have so many important items that developers begin to ignore them. Or perhaps some of the checklist items are only relevant in specific situations or when certain files are changed. While each item is important, they may not all always be applicable.