{"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-s4e82r0i","versions":[{"created_at":"2026-07-18T06:06:57Z","element_count":84,"note":"5軸GA polish 43->96 by M5 (autonomous)","saved_by":"mcp","sha256":"aa71806d7017b6f7aebc59d1c15041ac61c29bd6324afe32fd15ad7b58952161","version":3},{"created_at":"2026-07-18T05:54:29Z","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":"e2e6a3c6563a42c0387e08ad38adf1534a5f0e57e4e70ca5ea8c4ed83786bc40","version":2},{"created_at":"2026-07-18T05:54:29Z","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}]}