{"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-d3vp4cg0","versions":[{"created_at":"2026-06-10T22:52:49Z","element_count":77,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 / jpy75041820→quote19847721 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"b90eb47266338ce6bac7bc9a8977a716390c31864aae1c6f2d78d04abd5da14b","version":10},{"created_at":"2026-06-10T16:23:25Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"55125bab84f698cd9a00e785491ff43cb90bb6f56a5071d5b0ef97255c0ec459","version":2}]}