Developer environments are increasingly vulnerable to security risks due to the rise of agentic coding assistants, which interact with systems in complex ways that can introduce malicious code and escalate privileges. The lack of built-in security features in Model Context Protocol servers and rules files exacerbates these risks, leading to potential supply chain attacks. To mitigate these threats, organizations should implement traditional best practices such as sandboxing, supply chain scrutiny, and enhanced monitoring of coding assistant workflows.