{"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-5rcft0t3","versions":[{"created_at":"2026-06-13T16:56:09Z","element_count":73,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"0169d3a78fe5dbd730ec6d812908d6f08dd299661de8d399dd1ea7880b98b7f7","version":3},{"created_at":"2026-06-13T16:51:17Z","element_count":82,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b197ad6b8bd214b2517141e85d5bc4f058b79f8dd4f50ff7e610948428693d48","version":2},{"created_at":"2026-06-13T16:51:14Z","element_count":82,"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}]}