{"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-g24wiihy","versions":[{"created_at":"2026-06-29T06:21:00Z","element_count":73,"note":"5軸GA polish 45->95 by M5 (autonomous)","saved_by":"mcp","sha256":"22f0b0d75d253c7c37618d6493d390ae0bd1c8cdf3d6dd77a1feb9e7fb85d832","version":3},{"created_at":"2026-06-29T06:17:37Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0d1b029c199f399daa04409c860c5f919995a3490b1e898e93f60d8fc6626b7b","version":2},{"created_at":"2026-06-29T06:17:37Z","element_count":105,"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}]}