{"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-ol0x8yp8","versions":[{"created_at":"2026-06-10T22:52:35Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote19285327 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"64f73e5d2ec836fc861cc73165319875a676766866edfa273fdc85b6679801bf","version":18},{"created_at":"2026-06-10T13:55:43Z","element_count":72,"note":"5軸GA polish 66->97 by M5 (autonomous)","saved_by":"mcp","sha256":"918ef60f7041214dc69fe76d2637499d5958363190055510204dd7177f1d2bfb","version":5},{"created_at":"2026-06-10T13:46:12Z","element_count":50,"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":"190411a9fcb2f4ac3f64444406ba349898300853c4f48b77ed88bd60d4a3e1e7","version":4}]}