Crate acp_utils 

aether-acp-utils

Utilities for the Agent Client Protocol (ACP), handling notifications, elicitation, and protocol extensions between agents and their host UIs.

Table of Contents

• Key Types
• Feature Flags
• WebSocket transport
• License

Key Types

• elicitation – Typed conversion between MCP elicitation and native ACP elicitation/create messages
• SessionUsageParams – Token usage tracking notifications
• McpNotification / McpRequest – MCP message tunneling over ACP
• TokioAcpAgent – Tokio-native ACP transport
• AcpClientHandle – Initialized, cloneable client for typed ACP v2 requests
• AcpEvent – Ordered notifications, including replay updates sent before the resume response

Feature Flags

Feature	Description	Default
client	ACP client (for UIs connecting to agents)	yes
agent	Tokio-native agent subprocess and Unix stdio transports	no
websocket	Message-oriented WebSocket transport	no
testing	Public in-memory ACP test peers and transport helpers (enables client)	no

WebSocket transport

Enable the websocket feature to use websocket::WebSocketTransport<S> with an already-established WebSocket connection.

License

MIT

Modules

agent

client

config_meta

config_option_id

content

elicitation

meta

notifications

Typed wire-format types for Aether’s custom ACP extension requests and notifications.

testing

Duplex-backed test harness for ACP connections.

websocket