{"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-lph86m4l","versions":[{"created_at":"2026-06-10T23:07:16Z","element_count":84,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72816480→quote24583664 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"67e9d8475a35a91c8eae9f238570f254ea095540ad14d9274b4c30f8eba79700","version":9},{"created_at":"2026-06-10T22:52:02Z","element_count":84,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"eae899cc036e1d8508b92794f47b2389637a8038f1500161eefcd261c3460f6f","version":8}]}