{"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-wihdcyea","versions":[{"created_at":"2026-06-10T23:00:38Z","element_count":66,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy102533759→quote21372379 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"c06b846f6438f56c55cd714f748c6c00e39ef0d57a59c0838055b36f66f92cab","version":9},{"created_at":"2026-06-10T21:44:08Z","element_count":73,"note":"5軸GA polish 60->97 by M5 (autonomous)","saved_by":"mcp","sha256":"d25557b5038f4df0576f06dc4b8d8ff8f87d0df0f2f83b357f8e396f1cd73178","version":3}]}