Crate agent_proxy_rust_core 

agent-proxy-rust-core — middleware trait, axum server engine, and upstream forwarding.

This crate provides the foundation for the agent-proxy-rust project. It defines the ProxyMiddleware trait (the central extension point), core domain types, error handling, configuration, an authentication layer, and the axum-based HTTP proxy engine.

Architecture

Client → Auth Layer → Router → handle_proxy_request
                                    ├── on_request chain (registration order)
                                    ├── forward to upstream
                                    └── on_response chain (reverse order)

Middleware crates (compress, bridge, model-router, cost) implement ProxyMiddleware and are composed via the builder.

Re-exports

pub use compression::CompressionStats;

pub use compression::read_tokenless_stats;

pub use config::ProxyConfig;

pub use error::ProxyError;

pub use middleware::CostRecorder;

pub use middleware::ProxyMiddleware;

pub use server::AgentProxy;

pub use server::AgentProxyBuilder;

pub use types::AgentType;

pub use types::ChannelConfig;

pub use types::ConnectionContext;

pub use types::ProxyRequest;

pub use types::ProxyResponse;

pub use types::detect_api_format;

Modules

auth

Authentication middleware for the proxy.

compression

Compression statistics tracking across three layers.

config

Proxy configuration types.

error

Proxy error types and HTTP response mapping.

extensions

Well-known extension keys for ConnectionContext::extensions.

middleware

The ProxyMiddleware trait — the core extension point for the proxy engine.

report

Tokenless report file consumer.

server

The axum-based proxy server engine.

testing

Shared test helpers for the core crate and downstream middleware crates.

types

Core domain types for the proxy engine.

Enums

ApiFormat

Re-exported from llm_bridge_core::model::ApiFormat as the single source of truth. The target API format for protocol transformation.