{"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-s6o7syeo","versions":[{"created_at":"2026-06-11T01:57:08Z","element_count":83,"note":"5軸GA polish 45->98 by M5 (autonomous)","saved_by":"mcp","sha256":"45267ed8333eac921d6feb612b52b3b1664c6c7ba55c575985d1f970c8359bbc","version":7},{"created_at":"2026-06-10T23:58:02Z","element_count":54,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"35192b12c7aaa02bcfbb0f74f4464636c14cdaf08c36e784dab9c993d99eac8c","version":2}]}