{"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-xi3rhf5m","versions":[{"created_at":"2026-07-06T19:43:36Z","element_count":72,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"7677a9bc0c52196f88abcacf8925decfe4b4b730f336c89d31c07e369c86f6ab","version":3},{"created_at":"2026-07-06T19:37:22Z","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":"bd4d8e30b1801babbb166cebc1e97f805ad444b7518da06eab13cabdb5c2e23e","version":2},{"created_at":"2026-07-06T19:37:22Z","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}]}