{"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-xszahnnj","versions":[{"created_at":"2026-06-10T22:52:38Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy68153976→quote22302745 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"67aed29b0eb82f6f8710bb6572921def1ce117158db9dfbdb5968a180dd9e4ca","version":16},{"created_at":"2026-06-10T14:45:50Z","element_count":83,"note":"5軸GA polish 61->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e24a08fb6829e435f430d11596ad764dc138e801a4eefd211189a9e5843d24d5","version":7}]}