Without a CHANGELOG, users feel like they are living in a house where someone moves the furniture every night while they sleep. With a CHANGELOG, they have a map.
A changelog transforms technical activity into meaningful information. It answers three critical questions: What is new? What was fixed? What is going to break if I update? The Difference Between a Changelog and a Commit Log CHANGELOG
: Names or handles of contributors who made significant contributions to the release. Without a CHANGELOG, users feel like they are