{"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-wzqo4fe3","versions":[{"created_at":"2026-06-10T22:58:05Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20576137 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"90a6379caa8e2bf9064ccb25c8e743a702a2b1a3ee892679bef24be14456f91a","version":9},{"created_at":"2026-06-10T19:50:49Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"14b610871379661980621e903e0238bdff9deafbfcac2aaa5bf5996b10f9fb45","version":2}]}