> Ok, but how do you know that a change (possibly a bugfix) in your code will break something (maybe a weird, broken thing) that I depend on? That would be uni

> Ok, but how do you know that a change (possibly a bugfix) in your code will break something (maybe a weird, broken thing) that I depend on? That would be unintentional though. If that happens to you report it as a regression and most developers will give it super high priority and even release a hotfix to deal with it. There's a big difference between accidental breakage, which is always a bug, and intentional breakage where it's reasonable to give some type of notice to people consuming your platform / API.