{"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-f453q0ai","versions":[{"created_at":"2026-06-11T00:14:54Z","element_count":89,"note":"5軸GA polish 60->98 by M5 (autonomous)","saved_by":"mcp","sha256":"ed8dd17f86c407e3ba06faa44ea382a5a00e8f167b4ef6fdfc5e51031da1b608","version":13},{"created_at":"2026-06-10T23:09:58Z","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":"6b04bd5694e0dd35438b22540fd5365ad1ad62bc0b964a7cca9a022a313a5903","version":7}]}