{"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-cxrk9am0","versions":[{"created_at":"2026-07-01T19:36:02Z","element_count":83,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"bc223daa41b92aed34f82ddc247d485dca4e8c4400fac2ae0df02ff91da6ecbe","version":3},{"created_at":"2026-07-01T19:23:29Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"db1f5d85ae130668d84a9d6159f2e2dd3c52d37a7f9c3e99619de62ccaaeae0a","version":2},{"created_at":"2026-07-01T19:23:29Z","element_count":105,"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}]}