{"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-m7m7sjyo","versions":[{"created_at":"2026-07-06T19:43:36Z","element_count":83,"note":"5軸GA polish 46->97 by M5 (autonomous)","saved_by":"mcp","sha256":"0989ffb0ec1428fa18e64231d1091f06aeb7db1000934cc690135fa1d581af19","version":3},{"created_at":"2026-07-06T19:38:02Z","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":"93263bb59270d81e61b466caef1e0cc621b0fffc7c0f4fd6831845e572679068","version":2},{"created_at":"2026-07-06T19:38:01Z","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}]}