{"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-fru8xmh1","versions":[{"created_at":"2026-06-29T06:21:00Z","element_count":84,"note":"5軸GA polish 43->95 by M5 (autonomous)","saved_by":"mcp","sha256":"56d5da0a7b2184b85e731ad9e7081c6270f7880f51701f83dfae4a4bcecd14e8","version":3},{"created_at":"2026-06-29T06:11:35Z","element_count":87,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"a9fecb7da65206989d10f768e622abe32ec24f6baa0dae179ac2549a775b30ce","version":2},{"created_at":"2026-06-29T06:11:35Z","element_count":87,"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}]}