{"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-w4e40sne","versions":[{"created_at":"2026-06-13T21:24:41Z","element_count":83,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"28bffe3d8de5e164067bb34bdb2465030364795e325bfda8107df0e8480d2605","version":3},{"created_at":"2026-06-13T21:12:10Z","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":"4fad9e1cec8184fbbd72179c420e6710cac20093c5c29089a2347d5667b4d408","version":2},{"created_at":"2026-06-13T21:12:07Z","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}]}