observability

Telemetry design method in four steps (map the request path, define wide-event and log fields, set SLIs and SLOs, alert on burn rate) with wide events (canonical log lines), structured logs, OpenTelemetry traces and metrics, RED/USE, cardinality and privacy rules, Python and Rust tooling. Use when deciding what to log, measure, trace or alert on, adding monitoring, dashboards or health checks, or preparing a service so production incidents can be debugged quickly; it designs the telemetry ahead of incidents, while diagnosing a live failure belongs to Superpowers systematic-debugging.