union_apart joins bodies whose boxes are clearly apart (many pattern tools, #261) without any intersection work: their shells side by side. Each face and edge of the result is its piece's own, unchanged, and the result now says so (a history over the pieces), so a pattern's cut keeps the exact names of every copy's faces. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01J53sR6gEaVt56soFDpTck8