{"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-2v93fypx","versions":[{"created_at":"2026-06-13T15:51:06Z","element_count":91,"note":"5軸GA polish 44->95 by M5 (autonomous)","saved_by":"mcp","sha256":"da7ddc9a9b7be4b3c5f6dba09e81a431c8a579cad9af6bd8b32027beeda1c5eb","version":3},{"created_at":"2026-06-13T15:42:34Z","element_count":119,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"5f5741626b8d741c835fb534cf840fcbc9a3bc8c90fa4a87cb2dc5a1c7bff4c0","version":2},{"created_at":"2026-06-13T15:42:33Z","element_count":119,"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}]}