Developed per-client Prometheus metrics for the REQ_CLIENT_ACCESSES_BY_INDEX3 codec within the facebook/time repository, enhancing the ntp/chrony integration to expose detailed NTP client statistics. The work involved extending Go-based API development and network programming to support decoding and encoding for the v3 codec, with dedicated constructors to separate polling and reset flows and prevent unintended resets. Comprehensive validation included unit tests, fuzzing with over a million inputs, vetting, and live integration testing against Chrony 4.6.x. These changes improved observability and enabled more granular capacity planning and SLA monitoring for NTP client traffic through chrony_exporter.