{"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-o6elxcdr","versions":[{"created_at":"2026-06-11T00:14:33Z","element_count":91,"note":"5軸GA polish 55->97 by M5 (autonomous)","saved_by":"mcp","sha256":"5906ae2bbed3e57902d7c70f481908cb990f3a0da4c682cfd12a6210805edb70","version":13},{"created_at":"2026-06-10T23:09:33Z","element_count":54,"note":"legacy fix: 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":"297fbc93b8a65f6a980d78a7e9684051f236b6b932a03f86ada0f5847df10bd4","version":7}]}