{"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-9bop4qk9","versions":[{"created_at":"2026-06-10T22:57:39Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy40475808→quote21192161 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b5a2240d415928fc2b789ad3873cad5852ecf482db1fe858939538a0f93f8b53","version":9},{"created_at":"2026-06-10T19:34:22Z","element_count":84,"note":"5軸GA polish 60->93 by M5 (autonomous)","saved_by":"mcp","sha256":"127199a0c895c4d94fba9017b9b3d7bac8cfc0f3e8fb26739726cdc2d569ced9","version":2}]}