{"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-igqmu59p","versions":[{"created_at":"2026-06-11T01:05:13Z","element_count":74,"note":"5軸GA polish 45->97 by M5 (autonomous)","saved_by":"mcp","sha256":"aa10d1da891082a118ba92074702e18cc2a155aa943e0f95b3264a8c13853ca8","version":14},{"created_at":"2026-06-10T22:16:36Z","element_count":50,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"9e329fd1a18001414ca9fd178229855692b1d90338b875362bfe25ec191effdb","version":2}]}