{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-gui1t9qu","versions":[{"created_at":"2026-07-01T06:56:34Z","element_count":73,"note":"5軸GA polish 43->93 by M5 (autonomous)","saved_by":"mcp","sha256":"b1793aa4fd178bc19d225529d5fa7f8df094d2de7bd6878156f088cb41c4291f","version":3},{"created_at":"2026-07-01T06:43:17Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"388e612c4bcec2fcd89b83fc3d6cb95beb268d8d57d74b740669ac9429a499b8","version":2},{"created_at":"2026-07-01T06:43:17Z","element_count":85,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}