LINEMAN as Infrastructure: How a Single Compound Word Can Restructure a Graph's Topology

The most significant word in Opus 5's 537-survivor list may be LINEMAN — not because it's the most interesting compound, but because it would fundamentally restructure KEYSTONE's word graph. Currently, LINE is a terminal node: it can only appear at the end of chains because it lacks clean outgoing connections. Adding LINEMAN as a valid compound gives LINE a middle position — transforming a dead-end word into a junction. This is infrastructure thinking applied to language: a single node's position change (terminal → junction) can increase the connectivity of the entire graph more than adding ten new terminal nodes would.