{"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-bebsv5cy","versions":[{"created_at":"2026-07-13T09:38:57Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"72910ab58b11132e7ff684bf07e097f99a3c4bf6cf3ec79feabe239a8fadaf65","version":3},{"created_at":"2026-07-13T09:34:26Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"6e7a6c5506e85d79c70842349b35b25991e6da1d2327eed44bf6600e507f380c","version":2},{"created_at":"2026-07-13T09:34:26Z","element_count":126,"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}]}