{"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-jzi595a3","versions":[{"created_at":"2026-06-17T19:25:48Z","element_count":89,"note":"5軸GA polish 42->95 by M5 (autonomous)","saved_by":"mcp","sha256":"9869199dc2a31a0480db564100512e8c2e64d7c887dcf95d822bcda9b76c2128","version":3},{"created_at":"2026-06-17T19:21:43Z","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":"a6ca7178945c6dffe0dfb7d1dd9793ccffde386ca1d8a16e28f3df52c55314ab","version":2},{"created_at":"2026-06-17T19:21:42Z","element_count":86,"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}]}