Risszeichnung on cream paper, 4:5 portrait: a precise modern cutaway of a hierarchy-preserving document-index apparatus, with numbered page leaves forming a branching skeleton inside a modular hex-lattice frame. Black reasoning chambers open only along document branches; loose vector fragments fall into a pale discard tray. Phosphor-green structural pins, one hot-pink organic bookmark tendon, and a narrow signal-cyan trace mark the active route. German lower-right parts list, seven items including “06 ABZWEIGUNG” and dry joke “07 KEIN SCHNIPSEL”; circular BRAINHUGGERS BUREAU · SYMBIOSE-ARCHIV seal struck once, registration crosses, thin callouts to the root page, branch gate, and discard tray. No rendered title. Output in exactly 1122 x 1402 px, 4:5 portrait ratio.