{"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-t6725sk9","versions":[{"created_at":"2026-06-10T22:52:06Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy73729440→quote22947594 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c937d3f4651d4aec046c5d86358f1137a486fde4e337c11e7815e28970e17c0d","version":26},{"created_at":"2026-06-10T13:12:50Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積97.8㎡(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":"626cbf6e0ca0d68f9a481948e554694ddb98eccc3c0af95bb639e70656803844","version":11},{"created_at":"2026-06-10T08:48:35Z","element_count":83,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"b0b5065ca2d7f69d9773ac54ade33efb2a3a7f75d9b12f6824771284cb2058bf","version":3}]}