{"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-263qj6st","versions":[{"created_at":"2026-06-10T22:52:27Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22959831 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"dc2d549b76c7baf21fc6342e89f86e4960223214bf297867ba1eebab1f800e84","version":21},{"created_at":"2026-06-10T13:32:14Z","element_count":63,"note":"backfill: 延床=居室床スラブ実面積106.2㎡(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":"fba6b1542fe8f9e4c2ec13ef9af5cd09aa91cbe7126247c307c48cf25cc657b4","version":7},{"created_at":"2026-06-10T12:16:02Z","element_count":70,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"9c653309c71246b62a507184703a3db01d2867b35e682a47e699e84dbd59f5d1","version":3}]}