if (bucketSize == 0) continue;
铁路部门表示，陈某于 2 月 19 日提交厦门（厦门北）至宜兴的候补订单，并在 2 月 22 日自行购买了另一趟 G1656 次车票，但未取消候补。
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The common pattern across all of these seems to be filesystem and network ACLs enforced by the OS, not a separate kernel or hardware boundary. A determined attacker who already has code execution on your machine could potentially bypass Seatbelt or Landlock restrictions through privilege escalation. But that is not the threat model. The threat is an AI agent that is mostly helpful but occasionally careless or confused, and you want guardrails that catch the common failure modes - reading credentials it should not see, making network calls it should not make, writing to paths outside the project.