{"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-x9s9yy4x","versions":[{"created_at":"2026-06-10T23:00:13Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote20835511 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"90c390c782b33fafe1e8fb92babc5457a4c63104d3dc8c7afcacde14e848522b","version":9},{"created_at":"2026-06-10T21:11:27Z","element_count":90,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"5c2cd015828d419e80a0da6e7fb98076ad4463f5de3af5c3daa7a23a5f69bce3","version":3}]}