{"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-7ii7b8oe","versions":[{"created_at":"2026-06-13T17:24:08Z","element_count":68,"note":"5軸GA polish 42->93 by M5 (autonomous)","saved_by":"mcp","sha256":"cdb8ae7a05ed7b25c92f16a285f965f08e2ee7998d2ee041ce1c51c83df5267e","version":3},{"created_at":"2026-06-13T17:13:15Z","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":"32635c95bea9b0f9883d534904a0912d198bf8e4751801493b7bc459e291c687","version":2},{"created_at":"2026-06-13T17:13:11Z","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}]}