18 people are the primary owner of at least one file in sugarlabs/sugar, and Tomeu Vizoso owns the most: 93 files, or 44% of the codebase. The truck factor is 2: that is how few people would have to leave before the majority of owned files lose their owner. 31 files have exactly one contributor, and 1 module is dominated by a single person.
Engineering-leader view of who owns what: silos, hotspots, dead code, and bus-factor risk by person.