The numbers your app lives on don't belong in logs or on sampled spans. Here's how a browser video converter's KPIs made the case for Application Metrics.
The Sentry Unreal Engine SDK now records the last seconds of gameplay and attaches the footage to crash reports, so you can watch what led to the crash.
I gave the free tier a cheaper model and it invented conference speakers who don't exist. What that taught me about model tradeoffs, evals, and reading agent traces.
Errors, traces, logs, and metrics overlap enough that it's hard to know which to use. Here's when to reach for each signal, with a real debugging walkthrough.