{"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-kexmx6nk","versions":[{"created_at":"2026-07-03T06:39:57Z","element_count":90,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"a4db327185cccc4d65444419c025ce1a5f41c9d7d4ac140e9aa702ba5d1f43a7","version":3},{"created_at":"2026-07-03T06:26:28Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"2942ff3ef8d6c4181cb0d11c4007b6df1433d1298da8370aa541931bcd70999c","version":2},{"created_at":"2026-07-03T06:26:28Z","element_count":85,"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}]}