{"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-hsgfi0wn","versions":[{"created_at":"2026-06-10T22:58:38Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy90050184→quote21306726 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"5c9c01addc815104b8220c7e31829b5f7f7bfa5d1c1a7d2e6d1a515feaf06756","version":9},{"created_at":"2026-06-10T20:07:24Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"69894eb98a34804eb9543f127ac01c74cfa752d515491d58005ebe8f94e1fb1e","version":2}]}