AI coding assistants are increasingly responsible for generating enterprise code, promising enhanced productivity and efficiency but posing significant security risks. These risks include the potential generation of insecure code, exposure of sensitive data, and integration of unverified dependencies, which are particularly concerning for enterprises managing compliance-bound data and critical applications. Secure Agentic Architectures, like Arnica's Arnie, address these challenges by embedding security measures throughout the coding process, from code generation to repository maintenance, ensuring AI-driven code meets enterprise security standards. These architectures integrate into the broader DevSecOps ecosystem, maintaining development speed while ensuring security and compliance. As the role of coding agents evolves, future architectures will enhance their capabilities to automatically detect and remediate vulnerabilities, adapt access management, and maintain continuous compliance, transforming coding agents into essential security allies within enterprise software development.