Agreed, if I was looking for a candidate that will always "reinvent the wheel" then I would want them to implement from scratch. I find it perfectly valid for t

Agreed, if I was looking for a candidate that will always "reinvent the wheel" then I would want them to implement from scratch. I find it perfectly valid for the interviewee to say "Hey! I wrote a module for <language> for this exact purpose! Want to check out my github page?".