{"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-juj0o02w","versions":[{"created_at":"2026-06-10T22:53:14Z","element_count":85,"note":"legacy fix: 平屋floors2→1 / rooms設備語除去 (旧世代データ是正・実験済u-house-890wnsao・rollback=m5:legacy_fix_rollback.jsonl)","saved_by":"mcp","sha256":"068bd771eccb095d839341cf4fc058471c32a97b0e7aa33f5c0ecbba900b99c7","version":10},{"created_at":"2026-06-10T16:55:08Z","element_count":90,"note":"5軸GA polish 54->96 by M5 (autonomous)","saved_by":"mcp","sha256":"bd2eadbf6e0aa73129988e9759ad1431c33c219a32f9aeb194fb96b1f16c1238","version":2}]}