{"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-ipchpp43","versions":[{"created_at":"2026-06-10T22:52:25Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20631425 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e2ed26997c784b6c85d5d93a9212244099988a267dd1fb711b7f3a47a49722a2","version":23},{"created_at":"2026-06-10T13:30:42Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積81.7㎡(基礎/屋外/ロフト除外)。設備数量/コスト過大の是正","saved_by":"mcp","sha256":"69c855550dc4f95c45cb4db404c8fc5e9985359113267fd75e07329629c229e4","version":9},{"created_at":"2026-06-10T12:00:00Z","element_count":90,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"d851a908f77357ca61d59913069f9e000ce9ef96dc96c23ec81502dc5378ebe7","version":4}]}