Demo an LLM observability and evaluation tool to newcomers

Prepare a 20-minute technical demo of the company's LLM tracing and evaluation platform for an audience new to generative AI, as if you were already on the customer-facing engineering team. Build a small LLM app to demo it on (a retrieval app over company documents works), and walk through prompt iteration, testing with evaluations, and monitoring in production (errors, token usage, cost).

Follow-ups: why you picked that app, and how you kept the demo a story about a customer's workflow rather than a tour of features.