To build resilience in the Agentic Era, architects must implement a three-tier defense: 1. **The Intent Layer**: Use specialized LLMs to audit the intent of AI-generated code before deployment. 2. **The Identity Layer**: Implement Machine Identity and Intent (MII) frameworks to manage the permissions of autonomous agents. 3. **The Behavioral Layer**: Deploy real-time monitoring tools (like YARA-X) to detect and block anomalous system calls or network traffic. This 'Agentic Firewall' ensures that even if one layer is bypassed, the overall system remains secure.