- Only change code directly relevant to your PR. Sometimes you might find some code that could really need some refactoring. However, if it's not relevant to your PR, do not touch it. File an issue instead. This allows the reviewer to focus on a single problem at a time.
- If you write comments, do not exceed 80 chars per line. This allows contributors who work with multiple open windows to still read the comments without horizontally scrolling.
- Write adversarial tests. For example, if you're adding a new account type, do not only write tests where the instruction succeeds. Also write tests that test whether the instruction fails, if a check inside the new type is violated.