I try my hardest not to do any 'grading' based on someone's github, but instead use it as a reference of what I can expect when the candidate gets to the interv

I try my hardest not to do any 'grading' based on someone's github, but instead use it as a reference of what I can expect when the candidate gets to the interview. There's always a feeling out point at the beginning of the interview. I don't want to waste time hashing out things they clearly understand and likewise I don't want to throw them something over their head. Looking at their Github helps give me a starting point.