Review Assignment (JGit)

Integration round (Java). Use JGit to diff two branches of a git repo, take the list of changed files, and from a CSV owner mapping return the owner who owns the most changed files — i.e. auto-assign a PR reviewer. Requirements Java integration round built on JGit (the Java git library). Diff two branches of a given git repository and obtain the list of changed file names. A CSV file maps each file to an owner. Using that mapping, return the owner who owns the most changed files (the auto-selected reviewer). Notes This is the "find the reviewer after a PR" shape: branch diff → changed files → owner lookup → argmax by count. JGit's official site and getting-started docs have been intermittently down; set up and validate the JGit dependency before the round. One candidate's code was correct but a small JGit setup mistake stopped Part 1 from running — pre-verify your environment. Preparation Build a tiny JGit project beforehand: open a repo, resolve two branch refs, and diff them to a list of changed paths. Practice CSV parsing and a group-by-owner count in Java (Map<String, Integer>), returning the max. Verify your JGit dependency and a minimal "diff two branches" snippet compile and run cold.