{"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-er39r8nf","versions":[{"created_at":"2026-06-10T23:39:43Z","element_count":89,"note":"5軸GA polish 50->98 by M5 (autonomous)","saved_by":"mcp","sha256":"e2d4a3614908d3844f910774aad00f29e983dd355eda731404b9c3623f77958d","version":11},{"created_at":"2026-06-10T23:09:19Z","element_count":43,"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":"b8f9179cfa6128c13404aa740779a5c6e46422a8b7ae216584922899b49aa143","version":7}]}