{"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-10tjeebe","versions":[{"created_at":"2026-06-13T16:16:24Z","element_count":72,"note":"5軸GA polish 44->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d76c6c4e215ae4fd32eaa4ac8dd4e0c63a2fb66e2032f4f037b12069dc085d80","version":3},{"created_at":"2026-06-13T16:06:57Z","element_count":89,"note":"loop3: 設計時延床 70.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"8365e5116333c3eca13956822345407488c1132e3c5c9512dc3b263a672f809e","version":2},{"created_at":"2026-06-13T16:06:56Z","element_count":89,"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}]}