{"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-nguzz3ha","versions":[{"created_at":"2026-07-06T06:08:46Z","element_count":89,"note":"5軸GA polish 40->94 by M5 (autonomous)","saved_by":"mcp","sha256":"2c6f1e6682eb110b3cc6fcb812e71518b2b70c4d2a7b9e63eadfdbb97c302354","version":3},{"created_at":"2026-07-06T06:06:38Z","element_count":101,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3308fdb1b8ae2ce7a216fff58736de5206a23976ba854517e84fefa63cf1d9a9","version":2},{"created_at":"2026-07-06T06:06:38Z","element_count":101,"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}]}