{"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-hxrmw1ns","versions":[{"created_at":"2026-06-10T22:58:51Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63545472→quote19954947 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"880f2e856f614661a5abbc59fb390504d8d16832d94d19f3ce64b47258a1a856","version":9},{"created_at":"2026-06-10T20:22:39Z","element_count":74,"note":"5軸GA polish 60->92 by M5 (autonomous)","saved_by":"mcp","sha256":"ce4fef38dcb5d2ad9183781fc796b4f3be6e460848a026f0c583f3d726fe3e79","version":2}]}