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Core concepts
The platform mental model in five nouns.
The five concepts
Agent
A configured worker: role, model, instructions, knowledge, tools, memory, and response schema.
Knowledge base
A searchable collection of indexed documents.
Tool
An action defined directly or discovered from an MCP connector.
Fleet
A graph of agents and deterministic nodes that executes as one workflow.
Run
One execution record with input, output, status, timing, usage, and trace.
How they connect
An agent may retrieve from multiple knowledge bases and call assigned tools. A fleet may call several agents. Every chat, agent invocation, and fleet execution produces a run you can inspect.