Fabric

A fabric is the messaging layer that lets agents talk to each other.

At a high level, a fabric:

• accepts messages (envelopes),
• decides where they should go (which node / agent),
• delivers them, and
• reports back delivery acknowledgments, failures, or timeouts.

In the hello quickstart:

• You created a local fabric instance inside a single process.
• When you sent a message, the fabric looked at the destination address (for example, hello@fame.fabric) and delivered that message to the agent registered at that address.

Later guides will show fabrics that span multiple processes and machines, but the mental model is the same: the fabric is the bus that moves envelopes around.