{"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-lj3apdfl","versions":[{"created_at":"2026-06-10T23:01:10Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy96334560→quote23245750 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b5f0d847130df219d4e4b69ea8165638e81f1d09677845f5a0746bfd2ee04a1c","version":9},{"created_at":"2026-06-10T22:01:17Z","element_count":72,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"2aad421d4a6081c21032cf3b32233864d12480fd9875bf1123eb93672ff44727","version":3}]}