Victus observability has two layers:
infrastructure observability Prometheus, Loki
LLM observability Langfuse via LiteLLM callbacks
The observability stack owns:
prometheus metrics collection
loki log storage and querying
The llm stack owns:
litellm gateway callbacks
langfuse LLM tracing, cost, and audit surface
LiteLLM sends success and failure callbacks to Langfuse.