luthien-proxy

This skill should be used when the user needs to create, modify, or understand Luthien gateway policies — intercepting and transforming Anthropic API traffic. Covers "create a policy", "write a policy", "implement a policy", "modify a policy", "policy example", "how do policies work", "block a tool call", "filter streaming events", "transform responses", "intercept requests", or mentions PolicyContext, SimplePolicy, TextModifierPolicy, AnthropicHookPolicy, or policy hooks.