{"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-j899h0o5","versions":[{"created_at":"2026-06-10T22:56:06Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy85444799→quote19396944 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"3a2d8cd6b9a804258c01c1a1fde156bdd89071164b982a8c7e98e95e431dbf20","version":10},{"created_at":"2026-06-10T18:29:58Z","element_count":74,"note":"5軸GA polish 54->97 by M5 (autonomous)","saved_by":"mcp","sha256":"db9178f4f781e0d2e85ce44d253ca4ce7ecf69519785038aa656b94b52cdf016","version":3}]}