{"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-gxqnx57v","versions":[{"created_at":"2026-06-10T22:52:32Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy87379776→quote21288702 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"6de69c77dfc0a4448ce2ce44bc70abb8ccc8ac59b0437b507d711bc9ac2aabd8","version":19},{"created_at":"2026-06-10T13:05:58Z","element_count":84,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"bb54376944c0dae69b067696f03f7c9d11c4933e849b43a808e6a90a7503d6ce","version":4}]}