MODULE GRAPH / PORTALS / ACTUAL WALKING
Assemble the plan.
Check every connection.
Rooms, landings and connectors share explicit portal contracts. Every named entry-to-module route is checked against the emitted solids and supports.
Version 1: one level, 1–16 modules in a 4 × 4 grid, 24 joins maximum. Each module occupies 6 × 6 units with a supported floor at y=4.2. Room/landing/connector labels describe use; this version uses the same shell footprint for all three.
Only adjacent cells can join. Shared contracts fix floor, width and headroom; keys reconstruct the contract. Low headroom can produce valid input with rejected walkability. Reset a preset to restore its clearance.
Sorted semantic node IDs preserve feature identity under input reorder. This new blueprint format does not change gallery/chamber adapters or claim multi-level support.