{"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-fv8t8bro","versions":[{"created_at":"2026-06-30T19:37:02Z","element_count":85,"note":"5軸GA polish 46->98 by M5 (autonomous)","saved_by":"mcp","sha256":"10326c938c8bf2048a2d9c973e9a8ff860d3bfd3247e4f4d8f8e0812832a6936","version":3},{"created_at":"2026-06-30T19:25:03Z","element_count":130,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a70504bb6e40a2cbdeb585d17ee3ea254bb993b1c074247d5266f02c8ab304f2","version":2},{"created_at":"2026-06-30T19:25:03Z","element_count":130,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}