{"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-1fc3y8xc","versions":[{"created_at":"2026-07-20T06:06:55Z","element_count":83,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"93aeaa46cfcf2a413aa4ca9c00d4af7c6181189c7f6d7f6cd04f1b6c447e3d7a","version":3},{"created_at":"2026-07-20T06:02:30Z","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":"2e5bd9353961db3c7fced954c7637b4aeae32c195e9031467b8f974493c4e98c","version":2},{"created_at":"2026-07-20T06:02:30Z","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}]}