Do you make flush-to-wall (invisible / concealed frame) doors?

Yes. Flush-to-wall doors use an aluminium or steel concealed frame that is plastered into the wall, hidden hinges, and a leaf that sits perfectly in plane with the finish — no visible architrave. The result is a seamless minimalist wall, popular in Gulf villas and Japanese and Korean apartments. The frame must be installed before plastering, so it needs to be scheduled early in the build.