Solution that’s like 0 lines of code: namespacing. This way there’s e.g rails/rails-5 and rails/arel-3, or whatever. And if the project foo/name-41 gets abandon

Solution that’s like 0 lines of code: namespacing. This way there’s e.g rails/rails-5 and rails/arel-3, or whatever. And if the project foo/name-41 gets abandoned it can recover at bar/name-42. Note that rails is (officially) hell bent on not using semver at all as significant breakage happens even at minor versions.