{"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-9ax81i5g","versions":[{"created_at":"2026-06-10T23:39:55Z","element_count":90,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"ba977b15aaa6bdde30495ea605ea2fd9ced7583d336b5a5691782cb09894f591","version":11},{"created_at":"2026-06-10T23:08:47Z","element_count":54,"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":"f23b8857f8a980774b7d65df9e89dd80742c88e7500bf09218a9ab38fac9df6f","version":7}]}