10 · Version Control
Bisect
Find the commit that broke it
An automated binary search through history: git checks out a commit halfway between a known-good and known-bad point, over and over, until it pinpoints the one that introduced a bug.
Concrete example
Something broke in the last 200 commits — bisect finds the culprit in about eight steps.
Why it matters
Turns “when did this break?” from hours of guessing into minutes.