{"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-31nx37p9","versions":[{"created_at":"2026-06-10T22:58:58Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote22448917 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"78af998f6f3ef1ef73519e25c4a701344b98dbea2fd0009c89c7e53575c4da11","version":9},{"created_at":"2026-06-10T20:22:40Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ef28a10a97bae08c15314a26a0fd073d34656cb64c6e73d91f58ab94ac9a2944","version":2}]}