{"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-yudoclzh","versions":[{"created_at":"2026-06-10T22:57:38Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"13bc80288882dc28b88683349e8e9cd037de61c491b39854ef25b4d431af25b9","version":9},{"created_at":"2026-06-10T19:34:24Z","element_count":91,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"4846c668576f0f91b2efd666392797ecca5e02dc8eb4e7063eaf608138c4ee9d","version":2}]}