{"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-7lqpkbd1","versions":[{"created_at":"2026-06-10T22:52:23Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy63326340→quote24745754 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"73b5a70527b9f3d4782952de8001002c26f33c6f37155637d7ffed1b242b07c4","version":23},{"created_at":"2026-06-10T13:29:29Z","element_count":85,"note":"backfill: 延床=居室床スラブ実面積103.4㎡(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":"9278b4103a7f3b40c9ae3149e62c1ffd12ad70cd9db2d1fff6308a4368b56a25","version":9},{"created_at":"2026-06-10T11:43:23Z","element_count":90,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"713bb2d18456c34b6d83b8012927dbab089637dbf40084de2e298d2bf93f45e4","version":4}]}