{"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-k778o22w","versions":[{"created_at":"2026-06-10T22:52:31Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20765791 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"72fa9b443a96ae0d19d843776ef0bc2bb9f7b00354d97ed60cf0363e7c722d8c","version":20},{"created_at":"2026-06-10T13:35:01Z","element_count":66,"note":"backfill: 延床=居室床スラブ実面積90.0㎡(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":"ef58730c6e0de2497f03db4769a94763528065313eb9618228b0ec9c022dcbfe","version":7},{"created_at":"2026-06-10T13:05:10Z","element_count":91,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e91bd842572744c649c0b68e79e694b9af2a3e9ef243bcb7cefe8ecf61d57c3f","version":4}]}