{"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-qmicac6z","versions":[{"created_at":"2026-06-20T06:00:42Z","element_count":84,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"01e4d19a84a66d8d3796efa943e65b7d8473c3388cb259289c92da3e3a33f286","version":3},{"created_at":"2026-06-20T05:52:07Z","element_count":89,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f42f52f5f0c5dccbf77797c07e50057dee9eef4b50dc797268710b3247a36106","version":2},{"created_at":"2026-06-20T05:52:05Z","element_count":89,"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}]}