{"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-081l99yh","versions":[{"created_at":"2026-07-13T10:49:13Z","element_count":89,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"2429e468c367f551b888b3e3d6594d191c617d483e5397d7b9c55081ab3bb773","version":3},{"created_at":"2026-07-13T10:36:00Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"0e022c26afbbb5b6f0472c4ebadcfd3f87ed0c0dce1e3ffd0ced331bcc0b220e","version":2},{"created_at":"2026-07-13T10:36:00Z","element_count":105,"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}]}