Data Plane

The Agent Gateway Protocol (AGP) data plane implements an efficient message routing and delivery system between agents.

Message Format

AGP messages use a channel-based addressing scheme for content routing:

message AgpMessage {
    string channel_id = 1;
    string message_id = 2;
    bytes payload = 3;
    MessageMetadata metadata = 4;
}

Connection Table

The connection table maintains agent connectivity information by mapping channel IDs to connected agents and tracking connection state and capabilities.

Forwarding Table

The forwarding table implements intelligent message routing by implementing the following:

Maps message patterns to delivery strategies.
Supports content-based routing.
Maintains routing metrics and preferences.
Handles multicast and anycast delivery.

Message Buffer

The message buffer provides temporary storage by implementing the following:

Caches messages for reliable delivery.
Implements store-and-forward when needed.
Supports message deduplication.
Handles out-of-order delivery.

Data Plane Flow

        graph LR
    A([Input]) --> B[Buffer]
    B --> C{Forwarding}
    C --> D[Connection]
    D -->|Direct| E([Output])
    D -->|Multicast| E
    D -->|Anycast| E

    style B fill:#ffffff,stroke:#000000,stroke-width:2px
    style C fill:#f0f0f0,stroke:#000000,stroke-width:2px
    style D fill:#e0e0e0,stroke:#000000,stroke-width:2px

The diagram shows the message flow through the AGP data plane components:

Messages enter the system and are processed by the Message Buffer.
The Message Buffer handles deduplication and store-and-forward.
The Forwarding Table determines routing strategy.
The Connection Table manages delivery to connected agents.
Messages are delivered through direct, multicast, or anycast methods.