Gavio: open-source interceptor pipeline for production LLM apps

Gavio is an open-source middleware layer that lets developers intercept, inspect, and control LLM requests and responses in production — think logging, filtering, or transforming traffic without touching core app logic. For indie makers shipping LLM-powered products, this kind of observability and control layer is usually the unglamorous work that gets bolted on late; Gavio offers it as a dedicated, composable pipeline from the start.