> NEVER try to explain HOW your code works in a comment
Never is a strong word, sometimes the algorithm is just inherently complex and it's worth it to explain what you are doing.
Why is much more important, but it's also partially solved automatically by git blame and adding the task number to each commit message (and writing good commit messages which IMHO is more important than writing good comments). Each line of your code has commit message associated with it whether you care about it or not - make it useful.
Never is a strong word, sometimes the algorithm is just inherently complex and it's worth it to explain what you are doing.
Why is much more important, but it's also partially solved automatically by git blame and adding the task number to each commit message (and writing good commit messages which IMHO is more important than writing good comments). Each line of your code has commit message associated with it whether you care about it or not - make it useful.