{"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-yelkk6jz","versions":[{"created_at":"2026-06-30T19:50:48Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"8e538684ef2a51f6f05874b272c315944f91a5a3cf1d56e5a300095561b8e02b","version":3},{"created_at":"2026-06-30T19:33:33Z","element_count":88,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"bf7dd255df5dc5d805ac91c0e2ec1207b4a05bb11dbb86e5b32fb4860d281595","version":2},{"created_at":"2026-06-30T19:33:33Z","element_count":88,"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}]}