{"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-x8nopws9","versions":[{"created_at":"2026-06-10T22:52:24Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / jpy73729440→quote22820833 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"e9a6be0d79ee32632529a07c6dd21978fddef125779e21aca739bda258b32ca2","version":23},{"created_at":"2026-06-10T13:30:09Z","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":"23247ee7df3269cd38fde9a922802476da9ec64f771184abecd2d5c9a93d9625","version":9},{"created_at":"2026-06-10T11:43:54Z","element_count":83,"note":"5軸GA polish 61->97 by M5 (autonomous)","saved_by":"mcp","sha256":"b0b5065ca2d7f69d9773ac54ade33efb2a3a7f75d9b12f6824771284cb2058bf","version":4}]}