{"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-d4e9pfyt","versions":[{"created_at":"2026-06-10T22:52:42Z","element_count":65,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75991608→quote24721040 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"4a6286c00b89281493bee5f0464027dcc7f7c2905e56ff6a6cb72a8d8ceb629f","version":13},{"created_at":"2026-06-10T15:19:37Z","element_count":90,"note":"5軸GA polish 52->97 by M5 (autonomous)","saved_by":"mcp","sha256":"4d0e8b6709bae94a245684b75800eb42a694a9877c844e74b19c29de65aee8f7","version":5}]}