{"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-9a1ji5a1","versions":[{"created_at":"2026-06-13T20:46:26Z","element_count":70,"note":"5軸GA polish 41->92 by M5 (autonomous)","saved_by":"mcp","sha256":"99a5dcf27f65cd5d2d87e7a1b4dc23eedb20a70b53bd546b020a5dc6e85b3d00","version":3},{"created_at":"2026-06-13T20:36:23Z","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":"0c105a260a16d888160e5b53cd380a2b793395ec4aa2ea27f03cc1e350c310a0","version":2},{"created_at":"2026-06-13T20:36:22Z","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}]}