{"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-t821i37x","versions":[{"created_at":"2026-06-10T23:57:06Z","element_count":89,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"795f68c3e489427f3e63bbcc7aa36fd43efafe5306c63758c1b1a6777c16fc4b","version":12},{"created_at":"2026-06-10T23:09:45Z","element_count":50,"note":"legacy fix: rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"206f84fbb6c2be5a695858e389b58f9ac0e1a7b4c145b5a75239075e2dd3cbd9","version":7}]}