{"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-qj45v6p0","versions":[{"created_at":"2026-06-13T14:48:39Z","element_count":90,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"4b0c264d6b79727e3852fef342acf47f477d306821516269591d0ea8253f7aa3","version":3},{"created_at":"2026-06-13T14:39:14Z","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":"77bb085985e4a80f413b5b3045dee02cc7637a1cb59fe6625dcd21bf4350fe8d","version":2},{"created_at":"2026-06-13T14:39:14Z","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}]}