{"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-dde9eh8q","versions":[{"created_at":"2026-06-10T22:52:56Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy41884668→quote22960791 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"d5f3e61396051d88eda80b0fd9e07e4d9ed6b336658e7937890632c3ff18ea26","version":10},{"created_at":"2026-06-10T16:39:41Z","element_count":89,"note":"5軸GA polish 60->94 by M5 (autonomous)","saved_by":"mcp","sha256":"dde8b2c47536bc8e215ad44a5197081b78fb975373d12d5703e0ad1a80d99c49","version":2}]}