The idea is to version control not just the code but the entire state of the project: bugs, documentation, discussion etc. I do think the implementation in foss

The idea is to version control not just the code but the entire state of the project: bugs, documentation, discussion etc. I do think the implementation in fossil is a mistake though. If they had tied it to the code dag then you would be able to go back to any point in the project history and see the exact state of the project at that time.