{"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-kg8l1fp8","versions":[{"created_at":"2026-06-10T22:52:34Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote21021361 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"cfa2ce810559454361a3a25b1857818362594b6056c97c6d68724d462ab3fdee","version":19},{"created_at":"2026-06-10T13:45:02Z","element_count":77,"note":"backfill: 延床=居室床スラブ実面積87.5㎡(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":"95a1e2c84e50b5990ad519a19fb2b95cbc3ce04325da63e92b01ffe26a830e73","version":6},{"created_at":"2026-06-10T13:21:54Z","element_count":72,"note":"5軸GA polish 59->96 by M5 (autonomous)","saved_by":"mcp","sha256":"7634acec30b92e5b662419b09ca7d432ddde782acc4c9510840844a78a868d77","version":3}]}