{"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-nyxcv1k1","versions":[{"created_at":"2026-06-10T22:49:43Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote18993811 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0e6fff0a102cc13d0d32ddf8786d1d22ca9050b7456ce171be4f6fc7d7e4563f","version":25},{"created_at":"2026-06-10T13:07:33Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積74.1㎡(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":"458f4e9196896f74f83211f96df8ef8438ef7f7ddaf4da0289dfd2714d9e6054","version":11},{"created_at":"2026-06-10T07:25:34Z","element_count":89,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"3976441a0a30c3b13f62cd01e4d8b0ac2ece1248924327f454a73df3123275d1","version":2}]}