{"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-7295tp9a","versions":[{"created_at":"2026-06-13T17:09:15Z","element_count":82,"note":"5軸GA polish 44->94 by M5 (autonomous)","saved_by":"mcp","sha256":"299b62eb150ca5d682aa5a332261bc934cdf263f1a5733a8484e231d52a9fd9a","version":3},{"created_at":"2026-06-13T16:58:26Z","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":"75cc24f80ad711a224431d796f1b9ba230086ae13a268cb653a697759b19bad9","version":2},{"created_at":"2026-06-13T16:58:20Z","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}]}