{"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-2hdva7ec","versions":[{"created_at":"2026-06-29T06:32:37Z","element_count":83,"note":"5軸GA polish 41->94 by M5 (autonomous)","saved_by":"mcp","sha256":"083dc2fe27da616cd5b721002a4a9b6154dc6e1248e48749e6388ed5ce6d7139","version":3},{"created_at":"2026-06-29T06:18:20Z","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":"5fd598b92904aa585f60e759bd0168774855f89b03c8d7a421d20e7e5f2d23ff","version":2},{"created_at":"2026-06-29T06:18:20Z","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}]}