Runtime Security

Tracks all file access and modification patterns in real-time to prevent unauthorized data exfiltration or tampering. This goes beyond simple permission checks to analyze the context of access:

• Read-Watch: Alerts on an agent accessing sensitive files (e.g., /etc/shadow, private keys) outside its defined task scope.
• Write-Watch: Blocks an agent from modifying its own configuration, prompt files, or executable binaries to prevent a persistent foothold.
• Exfiltration Prevention: Detects patterns of high-volume reads followed by network egress, a classic sign of data theft.

Enforces a default-deny posture for all outbound network connections from the agent's sandbox. Runtime security inspects Layer 7 (application layer) data, not just IPs and ports, to:

• Block connections to newly registered or uncategorized domains commonly used for command-and-control (C2).
• Terminate any connection that exhibits beaconing patterns (periodic, low-and-slow communication).
• Enforce DNS filtering to prevent the resolution of malicious domains, stopping an agent from phoning home even if it uses a hardcoded domain name.

Protects the agent's runtime memory from advanced attacks that never touch the disk. Key techniques include:

• Memory Scanning: Using tools like ClamAV or custom YARA rules to scan an agent's allocated memory space for injected shellcode or known malware signatures.
• Process Hollowing Detection: Identifying if a legitimate agent process has been started in a suspended state, had its memory unmapped, and replaced with malicious code.
• Control Flow Integrity (CFI): Enforcing at the hardware or OS level that the agent's execution path follows a pre-computed control flow graph, instantly crashing the process if an attacker attempts to hijack execution via a buffer overflow.

Agents often require API keys and secrets to function, making their runtime use a critical security chokepoint. This characteristic involves:

• Live Secret Scanning: Detecting if an agent's output or logs accidentally contain a plaintext secret or API key, and automatically revoking the credential.
• Just-in-Time (JIT) Credential Vending: Ensuring the agent only receives a short-lived, scoped token from a vault (like HashiCorp Vault) at the exact moment of execution, rather than having long-lived secrets in environment variables.
• Anomalous Secret Usage: Alerting if a secret is used from an unexpected geolocation, IP address, or by a process with a different hash than the one originally authorized.

A foundational runtime security principle where the agent's environment is treated as disposable and unchangeable. This is enforced by:

• Read-Only Root Filesystem: The agent's core OS and application files are mounted as read-only, preventing any permanent installation of rootkits or backdoors.
• Ephemeral Instance Lifecycle: The entire sandbox (e.g., a MicroVM or container) is destroyed after a single task or a defined time-to-live (TTL). A fresh, known-good instance is provisioned for the next task, ensuring any in-memory compromise is wiped clean.
• Stateless Design: The agent's runtime has no persistent storage, forcing all state to be externalized to a secure, audited database, which prevents an attacker from hiding data within the execution environment.

A seccomp profile (Secure Computing Mode) is a Linux kernel facility that restricts an agent process to a predefined, immutable set of system calls. Once applied, the process cannot expand its privileges.

• Reduces the kernel attack surface dramatically
• Blocks dangerous syscalls like ptrace, mount, or reboot
• Operates on a one-way transition principle—no escape
• Essential for least privilege execution in containerized agents

An ephemeral environment is a short-lived, disposable execution context created from a known-good, immutable image. After a single task or session, the entire environment is destroyed.

• Prevents state contamination between agent tasks
• Eliminates persistent threats—no malware survives teardown
• Built on MicroVM or Kata Containers for hardware isolation
• Enforces Zero Standing Privileges by design

Human-in-the-Loop (HITL) is a critical safety pattern requiring explicit human approval before an agent executes high-stakes actions. This serves as the ultimate runtime safety net.

• Integrates Break-Glass Procedures for emergency termination
• Implements Dead Man's Switch mechanisms for heartbeat monitoring
• Gates actions like financial transactions or infrastructure changes
• Provides auditable approval trails for compliance

Egress filtering controls outbound network traffic from an agent's sandbox, blocking connections to unauthorized destinations. This prevents data exfiltration even if an agent is compromised.

• Blocks command-and-control (C2) communication
• Enforces allowlisted external API endpoints only
• Can operate in fully air-gapped configurations
• Complements Trusted Execution Environments (TEEs) for defense-in-depth