[walkmod]

Thank you for your commenst :) but let me ask a question: Why do you consider them mutable? They are related into a commit and they are stored into an specific ref (it is not the default for Git notes). Git notes are also used to store static code analysis results.

The tool could generate the report as a file, sure. But The problem is that you will need a service to retrieve that file and compare - and then it becomes a non generic solution.

Indeed, my question is what do you want to do with that file? It can generate it, but nobody will take benefit of it, right?