AI Observability

Learn to trace your LLM calls, understand their cost, and evaluate whether the outputs give users what they need.

Learn through a story

Tracing every LLM call, scoring what comes back, and seeing what users do with it.

Pocket guide to

Learn with examples from your own product and data.

Have your coding agent build a learning path from your existing instrumentation and data.

Twig is a real website with a live playground for learning PostHog and exploring real code.

Fig. – Two trips on Twig’s AI planner: one recommendation, and one request that timed out.