108 people are the primary owner of at least one file in hkuds/deeptutor, and Bingxi Zhao (Frank) owns the most: 2,743 files, or 76% of the codebase. The truck factor is 1: that is how few people would have to leave before the majority of owned files lose their owner. 2,385 files have exactly one contributor, and 8 modules are dominated by a single person.