{"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-84b8g0jg","versions":[{"created_at":"2026-06-10T23:00:35Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote22448917 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"99921104ffd36588cabde1ab9de61643dbb2eb9cc9342a272582a498d6e65f53","version":9},{"created_at":"2026-06-10T21:28:14Z","element_count":71,"note":"5軸GA polish 61->96 by M5 (autonomous)","saved_by":"mcp","sha256":"fbf7e37fe3a62dd78b8a8900f10ed2d3fdd3e84e4e0dff92420a44d28463f8cd","version":3}]}