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SLIM in CoffeeAGNTCY

CoffeeAGNTCY uses SLIM as its default transport layer for all inter-agent communication. SLIM supports both unicast (1-to-1) and broadcast (1-to-many) messaging patterns, making it well-suited for CoffeeAGNTCY’s dynamic multi-agent workflows.

The AGNTCY App SDK abstracts the underlying SLIM protocol behind a unified factory API. This allows developers to instantiate SLIM-based A2A (agent-to-agent) clients and servers without dealing directly with low-level transport details. Learn more about the App SDK here.

Instantiating the Factory and SLIM Transport

factory = AgntcyFactory("name_of_agent", enable_tracing=True)
transport = factory.create_transport("SLIM", endpoint=SLIM_ENDPOINT)

Here:
- AgntcyFactory initializes the factory for the agent.
- create_transport("SLIM", ...) provisions a SLIM transport instance connected to the configured endpoint.

Sending Messages

SLIM accommodates both targeted and broadcast messaging within the same API:

  • 1-to-1 Message

Used when the supervisor agent needs to send a request to a single farm agent: 

response = await client.send_message(request)
  • Broadcast Message

Used when the supervisor agent sends the same request to multiple farm agents and waits for all (or a subset) of responses: 

responses = await client.broadcast_message(request, expected_responses=3)

The expected_responses parameter defines how many replies the caller waits for before proceeding.

Example Implementations

You can explore the CoffeeAGNTCY code to see these concepts in context: