{"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-b9fxrqxb","versions":[{"created_at":"2026-06-10T22:52:57Z","element_count":63,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy72711600→quote20894368 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"0afab6e624b0eff9da6588ffddc77fe7ce5ddf2b2e26c83e0ddc36e33db11b4e","version":10},{"created_at":"2026-06-10T16:39:12Z","element_count":73,"note":"5軸GA polish 60->95 by M5 (autonomous)","saved_by":"mcp","sha256":"dad07807ec17aa806b6f197569c09958c499dfec570f54df37c397d3ee4eaca1","version":2}]}