{"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-mouqj7ke","versions":[{"created_at":"2026-06-15T06:08:53Z","element_count":83,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"66ae19c18fefa0daaa32eb0142ee57cebe61e51fda35d1567046918048434be7","version":3},{"created_at":"2026-06-15T05:58:01Z","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":"a340758f835440980928ec9c2830350e90a200475c17bab813a4ff1c08a8f514","version":2},{"created_at":"2026-06-15T05:58:01Z","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}]}