Delivery Observability Checklist & Brownout Runbook

A one-page worksheet to instrument a streaming platform so it describes its own health: the client signals to capture via CMCD (session ID, buffer-starvation flag, buffer length, measured throughput), the server signals via CMSD (intermediary id, duress, throughput, round-trip time) and the standard Cache-Status / Proxy-Status / status-code vocabulary, the four golden signals sliced by region × CDN × ISP × device, the detect-confirm-act brownout loop, the real-time-log requirement, and the readi