{"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-3ovrvchj","versions":[{"created_at":"2026-06-13T20:29:29Z","element_count":90,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"4a58ced3629ec8bc22dc8303e0e161da14af6652e0fe40b869cbf4bfe1362f44","version":3},{"created_at":"2026-06-13T20:18:11Z","element_count":126,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0f1cbfe777ab89f7d82c90a9c4b38d8c08cc7ccec61ffdb967fa783a9e6fd444","version":2},{"created_at":"2026-06-13T20:18:09Z","element_count":126,"note":"言葉から生成: LDK+主寝室+子供室+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}