Plano is an AI-native proxy and data plane by Katanemo that offloads infrastructure plumbing for agentic applications. Built on Envoy, it provides low-latency agent orchestration, unified LLM gateway for multiple providers (OpenAI, Anthropic, Google, etc.), and a 4B-parameter routing model that automatically directs prompts to the optimal model based on complexity. The system captures rich Agentic Signals with zero-code OpenTelemetry tracing across every agent call. Filter Chains enable moderation, jailbreak protection, and memory hooks without modifying agent code. Agents only need to implement OpenAI-compatible endpoints in any language or framework, making Plano fully framework-agnostic.