{"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-ovalviewhouse-6vlbmt4w","versions":[{"created_at":"2026-07-01T06:56:34Z","element_count":82,"note":"5軸GA polish 41->93 by M5 (autonomous)","saved_by":"mcp","sha256":"cd5bd9dd60dc580a51ed2f8f293b467b0f3d788c5ed9bffc8de7b889d2b56cd3","version":3},{"created_at":"2026-07-01T06:49:19Z","element_count":86,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"81376efa7c0c6784908f69197542f20350bd58033ce1160936042db4c2e5f5b7","version":2},{"created_at":"2026-07-01T06:49:19Z","element_count":86,"note":"言葉から生成: LDK+main bedroom+2 kids rooms+bathroom+storage","saved_by":"mcp:create","sha256":"","version":1}]}