{"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-41kus8dg","versions":[{"created_at":"2026-06-10T22:56:00Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote21288702 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"03bb14db84d48fa3c879995fe9efefed726532066fed6419af7639572e2a50c3","version":10},{"created_at":"2026-06-10T18:29:54Z","element_count":92,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"a32b9da49c176199ab613d4e13a8d6286f57a5c2b29ced30447e1cfda8e62282","version":3}]}