{"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-ngg6b0w9","versions":[{"created_at":"2026-06-10T22:59:26Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68009927→quote19531381 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d0487fe9f1f1f8bd45144fcbfa24f8e39584dca8fa6930daa8c609332bf664b9","version":26},{"created_at":"2026-06-10T13:10:14Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積77.0㎡(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":"22afab92bdfc9941edbea7a460314cfa1a1bf6f3ce85556c5848180c19ac37ed","version":11},{"created_at":"2026-06-10T07:59:37Z","element_count":85,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ef8c4d982d2aec0b3ad45a2a89abcefc7bede32c1412b1824d7ad219bb7fa3e3","version":2}]}