{"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-3ijl9f3s","versions":[{"created_at":"2026-06-13T14:20:27Z","element_count":91,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"a6b621e8ead7b6792046dd3f62b3ac9a05b7456b2421ace1d419b8883f9cb166","version":3},{"created_at":"2026-06-13T14:09:39Z","element_count":85,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"26652ed8a17960ad3ae825efbd707c5f1ff9984314e13533646f76c2e335a14e","version":2},{"created_at":"2026-06-13T14:09:38Z","element_count":85,"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}]}