{"building":{"schemaVersion":"home-building/1","units":"feet","projectId":"fictional-example","revisionId":"example-1","address":"Two-room example","source":{"kind":"assistant-draft","fileName":"Fictional dimensioned example — not a property plan"},"review":"Unreviewed AI reconstruction; original source not verified by Home Preview.","scope":"Illustrative single-floor layout","issues":["Fictional example; not extracted from customer drawings."],"levels":[{"id":"ground","name":"Ground floor","elevationFeet":0,"heightFeet":9,"clearHeightFeet":8,"slabThicknessFeet":0.5,"footprint":[[0,0],[20,0],[20,30],[0,30]],"holes":[],"walls":[{"id":"front","start":[0,0],"end":[20,0],"dimensions":{"lengthFeet":20,"widthFeet":0.5,"heightFeet":8},"openings":[{"id":"front-door","kind":"door","hostWallId":"front","offsetFeet":5,"sillFeet":0,"dimensions":{"lengthFeet":3,"heightFeet":7}}]},{"id":"east","start":[20,0],"end":[20,30],"dimensions":{"lengthFeet":30,"widthFeet":0.5,"heightFeet":8},"openings":[]},{"id":"rear","start":[20,30],"end":[0,30],"dimensions":{"lengthFeet":20,"widthFeet":0.5,"heightFeet":8},"openings":[]},{"id":"west","start":[0,30],"end":[0,0],"dimensions":{"lengthFeet":30,"widthFeet":0.5,"heightFeet":8},"openings":[]},{"id":"partition","start":[10,0],"end":[10,30],"dimensions":{"lengthFeet":30,"widthFeet":0.5,"heightFeet":8},"openings":[{"id":"bedroom-door","hostWallId":"partition","kind":"door","offsetFeet":12,"sillFeet":0,"dimensions":{"lengthFeet":3,"heightFeet":7}}]}],"rooms":[{"id":"living","name":"Living room","usage":"living","polygon":[[0.25,0.25],[9.75,0.25],[9.75,29.75],[0.25,29.75]],"labelPosition":[5,15]},{"id":"bedroom","name":"Bedroom","usage":"bedroom","polygon":[[10.25,0.25],[19.75,0.25],[19.75,29.75],[10.25,29.75]],"labelPosition":[15,15]}]}],"stairs":[]},"evidence":{"ground":{"sheet":"Fictional example dimensions","dimensions":[{"label":"Outside left to right, footprint vertices 0 and 1","feet":20,"axis":"x","basis":"user-provided","modelSpan":{"from":{"kind":"footprint","id":"ground","index":0},"to":{"kind":"footprint","id":"ground","index":1}}},{"label":"Outside front to rear, footprint vertices 1 and 2","feet":30,"axis":"z","basis":"user-provided","modelSpan":{"from":{"kind":"footprint","id":"ground","index":1},"to":{"kind":"footprint","id":"ground","index":2}}}],"assumptions":["All dimensions are illustrative. Wall thickness: 6 inches. Clear height: 8 feet. No source audit."]}}}