{"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-k9kfvsl6","versions":[{"created_at":"2026-06-10T22:52:47Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73663920→quote21192161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"9a9608aecfb99eb1ffd34f0910eca6077776dd7ff74c9cdf62ff1dc0a412897c","version":10},{"created_at":"2026-06-10T16:08:48Z","element_count":68,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"fda46c53f1d2df359add18dc75cf5b97ed7dc03c0c36aa223fb306d209097036","version":2}]}