If I have a session history or histories, I can (and have!) mine them to pinpoint where an agent either did not implement what it was supposed to, or understand

If I have a session history or histories, I can (and have!) mine them to pinpoint where an agent either did not implement what it was supposed to, or understand who asked for a certain feature an why, etc. It complements commits, sessions are more like a court transcript of what was said / claimed (session) and then you can compare that to what was actually done (commits).