{"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-e9cqw6ph","versions":[{"created_at":"2026-06-10T22:54:37Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote21228016 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"354b0a5b7882948efe65b5abfc21151e236fa38aabe1c8024d7732b4bfc03f31","version":10},{"created_at":"2026-06-10T17:39:45Z","element_count":71,"note":"5軸GA polish 58->97 by M5 (autonomous)","saved_by":"mcp","sha256":"6555095928a0c7350a0a1133b91e66eeada87c6b6b7499174d3268a9ae3025b3","version":3}]}