{"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-l4qull87","versions":[{"created_at":"2026-06-11T01:56:54Z","element_count":73,"note":"5軸GA polish 47->97 by M5 (autonomous)","saved_by":"mcp","sha256":"aba8f8c7de0cf9c70c57bd907b923a177c693d520db711c172e54abd9b0b62f9","version":6},{"created_at":"2026-06-11T00:26:38Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"3c8a15b8fb2187be1550baba891cc06255cd1b4f78988888d8072589d2bbadda","version":2}]}