{"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-willowbrookhouse-ahvonc00","versions":[{"created_at":"2026-06-13T17:52:30Z","element_count":91,"note":"5軸GA polish 44->98 by M5 (autonomous)","saved_by":"mcp","sha256":"770415448338dd2fb08fbe463cdec72c8d8cfab4b9f0633061da1abbbd8a18d7","version":3},{"created_at":"2026-06-13T17:38:20Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"b7560842b3984e993d7df88e5c39e8bddaa06e59b722eaf1b38e35a1121a2518","version":2},{"created_at":"2026-06-13T17:38:15Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}