OpenTelemetry

LLM Observability in 2026 — LangSmith, Langfuse, Helicone, and OpenTelemetry

What to track in LLM apps, the tooling landscape (LangSmith, Langfuse, Helicone, Phoenix), the OTel GenAI conventions, and the metrics-and-traces playbook for production AI.

OpenTelemetry End-to-End — A 2026 Guide for Backend Engineers

How OpenTelemetry actually works in 2026. The collector, traces / metrics / logs / context propagation, instrumenting Python, Go, and Rust services, sampling that doesn’t kill recall, and the production-grade end-to-end setup.