Shehbaj Dhillon worked on the aws/amazon-vpc-cni-k8s repository, focusing on improving the accuracy of Prometheus metrics for VPC networking operations. He refactored the metrics system by converting gauges to counters, ensuring that metrics now represent total occurrences of AWS API errors, pod ENI errors, and force removals of ENIs and IPs rather than just their current state. Using Go and Prometheus, Shehbaj enhanced observability and reliability, allowing dashboards and alerts to better support incident response and capacity planning. His targeted changes in the prometheusmetrics module maintained code quality while enabling more meaningful SLA interpretation and future metric evolution.