{"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-bexy4k72","versions":[{"created_at":"2026-06-10T23:00:36Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72844800→quote25049217 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"8f5788a848f79ff6b940c68da05b5a981e3640cc7c867f9827c3354dfa89f2dd","version":9},{"created_at":"2026-06-10T21:43:57Z","element_count":69,"note":"5軸GA polish 61->95 by M5 (autonomous)","saved_by":"mcp","sha256":"2f362b578e12fad83aa1cea9bf5d9b1017e59b735c3c1a6e9a8289b7e9ab075d","version":3}]}