{"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-mr8cs4bu","versions":[{"created_at":"2026-06-10T22:52:42Z","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":"5dcf0fa00551fe5566e0b950ec9271db7fd7ebd064c08eefce5a78b1c7a33829","version":13},{"created_at":"2026-06-10T15:19:43Z","element_count":72,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"d02757d1130bc473dac76a4bbed2f67988373640776f788df3db277edfc5c49f","version":5}]}