Implements metrics, tracing, logging, and health checks for production services.
npx skills add https://github.com/Dazlarus/karl-code --skill observability-dazlarus
Please help me install this Agent Skill. Skill: observability Source: https://github.com/Dazlarus/karl-code/tree/main/.agents/skills/observability Command: npx skills add https://github.com/Dazlarus/karl-code --skill observability-dazlarus
High-intent search queries and answers about installing and using this skill.
Define Counter, Histogram, and Gauge metrics with labels, then increment or observe them inside endpoint handlers. Use histogram context managers like request_duration.labels(...).time() to measure latency per endpoint.
Create a tracer with trace.get_tracer and wrap operations in start_as_current_span blocks, setting attributes like user_id and status_code. Instrument HTTP clients with AioHttpClientInstrumentor for automatic span propagation.
A correlation ID links logs and traces for a single request across services. Add middleware that reads or generates an X-Correlation-ID header, stores it on request state, sets it as a span attribute, and returns it in the response.
Yes, over-sampling traces adds overhead in production. Use a low traces_sample_rate such as 0.1 in Sentry or OpenTelemetry configuration to balance visibility with performance impact.
Skip full observability for simple local scripts and development-only features where metrics, tracing, and alerting add complexity without operational value. Reserve it for production services and APIs.
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