{"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-um1rk8l3","versions":[{"created_at":"2026-06-10T23:39:46Z","element_count":90,"note":"5軸GA polish 50->98 by M5 (autonomous)","saved_by":"mcp","sha256":"166e75f5b603281b3116639893bb26e6c17f02bfd917d37872d0de3abe6c227f","version":11},{"created_at":"2026-06-10T23:09:02Z","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":"6773e11d336e415377a3299c5ceeadb180076fbb190c9aa29f50d8763695f0ae","version":7}]}