The floor plan as a functional diagram — the rooms, and the doors that genuinely connect them, drawn as a metro-style graph.
Warren reads the rooms on a level, the doors that genuinely connect them and the walls they merely share, and draws the result as a diagram — metro-style, or a plan anchored to the room centroids, with more layouts to come. Suggested routes (visitor, staff, logistics, technical) are proposed for you to correct, and corridors are drawn as trunks, not nodes.
Reading writes nothing to the model: the only thing Warren will ever write is room parameters, always behind a preview you accept first.