> c): Add \dynamic know and later find a special name for Harm's > dynamic engine.
(d) You add now `\dynamic` in a first MR. Eventually, Harm's stuff gets applied in another MR under the same name, extending your stuff.[*] IMHO there is no necessity to provide `convert-ly` rules between development versions, especially since the LilyPond's current micro version is still a single digit. Werner [*] Under the assumption that this actually makes sense.