{"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-0f2g9rk1","versions":[{"created_at":"2026-07-01T06:44:02Z","element_count":70,"note":"5軸GA polish 45->93 by M5 (autonomous)","saved_by":"mcp","sha256":"1a315f1b504459e3e0f52fbb32ddf01d24593471838d40a0a7d76fcf2e9a1a68","version":3},{"created_at":"2026-07-01T06:34:28Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f59310551c0635b62d8f5820ac1d53d74fa008b270d965ca3785c99cfdcbc003","version":2},{"created_at":"2026-07-01T06:34:27Z","element_count":86,"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}]}