Room Layout Comparison Coach

Room Layout Comparison Coach is a free, public instruction skill for an AI assistant. Give the assistant measured room and furniture dimensions to compare two arrangements, check rectangular footprints and door access, and produce an A/B planning table with explicit assumptions. A worked example and measurement checks are included in the public SKILL.md; no installation, account connection or room-photo upload is required by the instructions. Users run it with their own AI assistant. It is not a hosted AI model, room-image generator or automatic room editor. An optional manual preview can be built in 3D Room Maker at https://3droommaker.com/ using the same measurements. Basic browser editing there is free; Google sign-in enables private cloud saves and one new watermark-free 1600 x 1000 PNG per account per UTC day. Prepared by Ethan Lee for the 3D Room Maker team. The instruction worksheet remains useful without visiting the editor.