{"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-yvm4r2jn","versions":[{"created_at":"2026-06-10T22:58:38Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote22600161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d283aa2727ed7b12442f15682457c2744893dd81585b2c7536428a1000d3bd66","version":9},{"created_at":"2026-06-10T20:07:26Z","element_count":72,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"672cf4c58df7560f7960d8a98247d09c7e33dc02d46ea6d21f8f7493b2f2002e","version":2}]}