{"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-m9a51s3l","versions":[{"created_at":"2026-06-11T00:15:06Z","element_count":91,"note":"5軸GA polish 57->97 by M5 (autonomous)","saved_by":"mcp","sha256":"4947228715601d8d021c6c898b352831c51b461a64b2994d22d95b99d63d2d78","version":13},{"created_at":"2026-06-10T23:09:57Z","element_count":50,"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":"88c2df1b506820aa98950d83739bc6663b65f97c43d12636c8e88d2083216b30","version":7}]}