{"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-6idlh6oz","versions":[{"created_at":"2026-06-17T06:03:09Z","element_count":69,"note":"5軸GA polish 44->93 by M5 (autonomous)","saved_by":"mcp","sha256":"5d81b35c036c0081a91e06900cb4339eb6af9892e52013a8158efb536682689b","version":3},{"created_at":"2026-06-17T05:52:34Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0b25eb25202e5b0d3ad4c93a148e82650fdb2cd80c66dee702bee7168360c49d","version":2},{"created_at":"2026-06-17T05:52:31Z","element_count":119,"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}]}