On Wed, Apr 02, 2025 at 11:48:01AM -0700, Martin von Zweigbergk wrote: > Hi, > > The Gerrit, GitButler, and Jujutsu projects all have a concept of > a "change id", and it behaves in a similar way between the three > tools. The change id is conceptually associated with a commit. > It follows a commit as its rewritten (e.g. by amending and > rebasing). The three projects currently store and format the > change id differently. We would like to unify that so we can > interoperate better. We hope the Git project is also interested > in preserving and using this header. Notably, b4 also uses change-id, but as a series identifier, not as a commit identifier. It is not intended to ever make its way into git commits and is always passed in the patch footer. The format is an arbitrary unique string. :) -K