Coding agents like codex and claude are ultimately company products, so users often set up harnesses to prevent the leakage of sensitive internal information or

Coding agents like codex and claude are ultimately company products, so users often set up harnesses to prevent the leakage of sensitive internal information or data, as well as unintended execution. But harnesses are also sometimes configured with coding agent instructions, and as this article points out, problems can arise because it's the coding agent that executes those instructions. To prevent this, a separate program or conditions must be set up deterministically. For example, blocking web requests at the proxy level, or attaching a program that automatically masks personal or sensitive information within the input context.