Coordinating multiple agents that collaborate and hand off work is a different engineering problem than building a single agent with a few tools. The Microsoft Agent Framework SDK gives you several orchestration patterns for this - concurrent, sequential, group chat, handoff, and Magentic - each with real trade-offs. In this talk I build the same multi-agent problem multiple ways using these patterns and show where each one breaks down, where it shines, and how to decide which fits your workload. We'll cover how agent state passes between orchestration steps, common failure modes under each pattern, and how to debug a multi-agent system when something goes wrong several agents deep. If you've built single-agent systems and are now facing the "do I need multiple agents or one smart one" decision, this talk gives you the code and the framework to make that call.