Every team seems to have one person who knows how the payment flow works, or the auth setup, or that old script nobody else has touched in years. When that person leaves, things get messy fast.
I kept running into this problem, so I built Kinlyze. It reads your git history and shows you which parts of your codebase depend on a single person. You can even pick a developer and see exactly what would break if they left tomorrow. It runs fully offline, so your code never goes anywhere.