SIwithin Sandboxes Agentic CLI Runs with Cost Caps
October 20, 2026
SIwithin enables unattended execution of Claude Code and OpenAI Codex within a restricted directory fence. It enforces strict file-system isolation and uses a loopback proxy to cap API spending at a user-defined dollar amount per run.
HOW THIS AFFECTS YOU
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builderYou can safely run autonomous agents on local filesystems without risking unlimited API costs or directory traversal.
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policyThis provides a technical primitive for controlling agentic autonomy and resource consumption.