Adin Scannell developed a dedicated kfunc error counter for the facebook/bpfilter repository, focusing on enhancing observability and reliability in bpfilter deployments. Using C programming and system programming skills, Adin implemented kernel-space instrumentation to track kfunc call errors, making the counter accessible through bpftool for immediate diagnostics. The work laid the foundation for future integration with a monitoring daemon, aiming to centralize and streamline metric collection. This feature improved operational visibility, enabling faster mean time to recovery and more effective root-cause analysis. Adin’s contribution demonstrated a focused, commit-driven approach to feature delivery, addressing real-world monitoring and debugging needs.