{"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-qfq773zw","versions":[{"created_at":"2026-06-10T22:52:07Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy81611913→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":"833ade1372609c02aa0c9cb318158cdee11832716b9f68334ab61f88512ba289","version":25},{"created_at":"2026-06-10T13:13:04Z","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":10},{"created_at":"2026-06-10T08:48:54Z","element_count":84,"note":"5軸GA polish 54->98 by M5 (autonomous)","saved_by":"mcp","sha256":"43f39c406e5608517daa6afb30e066ee11321b67395273575e97901330527290","version":2}]}