{"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-g9fqkwpl","versions":[{"created_at":"2026-06-30T19:37:01Z","element_count":72,"note":"5軸GA polish 46->96 by M5 (autonomous)","saved_by":"mcp","sha256":"7685c82eface461f04f5acf59b552c3d535c5b06b16849439a4c0c0739995cdf","version":3},{"created_at":"2026-06-30T19:23:24Z","element_count":90,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"e695725af59db1c0d7a350e461d04da87bdf84fa908692b7f4e04af40656990d","version":2},{"created_at":"2026-06-30T19:23:24Z","element_count":90,"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}]}