Architecture
How agents reason, coordinate and connect.
Plan-and-Execute The agent generates a complete plan upfront and executes it sequentially. Predictable, auditable, rigid. ReAct (Reasoning + Acting) The agent interleaves thinking and doing in a tight loop. The plan emerges from execution, not before it. Coordination patterns The five foundational patterns for composing LLM calls and agents, from prompt chaining to evaluator-optimizer. Multi-agent topologies How agents are wired together: hub-and-spoke, hierarchical, flat mesh and swarm, and why production picks the hub. The interoperability stack How agents and tools connect across boundaries: WebMCP, MCP and A2A, converging under the Linux Foundation. MCP (Model Context Protocol) The de facto agent-to-tool protocol. Created by Anthropic, now at the Linux Foundation. A2A (Agent-to-Agent) The protocol that gives agents colleagues. Discovery, communication and delegation across boundaries.