{"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-pv90zips","versions":[{"created_at":"2026-07-13T10:09:59Z","element_count":69,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"982c447faeb0e8f3c1b5eeed705d9b9d40af49f82e39f60f296c67bf3dd481c2","version":3},{"created_at":"2026-07-13T09:51:11Z","element_count":83,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5884d2432ca36aba12655076754d394a6ce213d790f8f56fa4b39593035ba8fe","version":2},{"created_at":"2026-07-13T09:51:11Z","element_count":83,"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}]}