Charlie contributed to two core projects by delivering a stability fix and a configurability enhancement. In prometheus/node_exporter, Charlie resolved a memory leak in the macOS Filesystem Collector by applying Objective-C memory management techniques with @autoreleasepool and ensuring proper deallocation of C strings, which reduced memory growth during filesystem statistics collection. For major/traefik, Charlie implemented a strictPrefixMatching configuration for Kubernetes Ingress, aligning path prefix matching with the Kubernetes specification. This work included updates to documentation and the addition of test fixtures. Throughout, Charlie utilized Go, Objective-C, and CGO, demonstrating depth in system programming and cross-platform resource management.