{"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-1w7ybnc4","versions":[{"created_at":"2026-06-10T23:00:45Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19504363 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"2384f4f2999194c56c19a911be984ebbd75978791e572b0b06a62fb0dee98d5b","version":9},{"created_at":"2026-06-10T21:43:57Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"881cd97899babdba1c9082b714e3d6b3585c97d91f5788d0ddc4d02475e5e9fd","version":3}]}