All CI/CD workflow jobs must implement security controls for network traffic, particularly using the step-security/harden-runner action or equivalent technology. This prevents potential supply chain attacks or unauthorized data exfiltration during automated builds and tests. Example: ```yml - name: Harden the runner (Audit all outbound calls) uses: step-security/harden-runner@4d991eb9b905ef189e4c376166672c3f2f230481 # v2.11.0 with: egress-policy: audit ``` Ensure this step is added consistently to all jobs in CI/CD workflows to maintain a strong security posture across the entire build pipeline.