{"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-nawcbvhf","versions":[{"created_at":"2026-06-10T22:55:41Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote20764725 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"43af41cf3d5f4893cf657d7369964115f1effec48ba147c93d51748271e4aecc","version":10},{"created_at":"2026-06-10T18:14:08Z","element_count":72,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"753fa4c93082676081607042f10bc51dcb75a4a12d3f06ae0066dd737084450e","version":3}]}