{"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-83bn6bbn","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote19293329 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"2e59f258cbeb5ca02e518350703b148c0aa5eee02afaa44197bbcb0ec7ed9607","version":19},{"created_at":"2026-06-10T13:06:10Z","element_count":92,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"061d6e6164f9309a651f7b52dce380891a528a4332e36dc8f7716d851fecf0a5","version":4}]}