{"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-ajfu3ujx","versions":[{"created_at":"2026-07-08T19:41:17Z","element_count":73,"note":"5軸GA polish 42->92 by M5 (autonomous)","saved_by":"mcp","sha256":"7f0e6da4b055453fa5d7360908c1543722539ead4464eb188a3122e486747a46","version":3},{"created_at":"2026-07-08T19:29:14Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"1595366d1ae103f260d2eff1e19f334ed6d51e8f5c60f1dfaccac6597251761e","version":2},{"created_at":"2026-07-08T19:29:14Z","element_count":83,"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}]}