Part 2: The Action Patterns — Tools, Plans, Teams, and Memory

The four patterns in this part are the ones interviewers reach for most often. They map directly onto the four questions every agentic system-design interview eventually asks: how does your agent act on the world (Tool Use), how does it sequence its work (Planning), how does it divide the work (Multi-Agent Collaboration), and how does it remember anything (Memory Management).

Get comfortable with these four and you can assemble a credible answer to almost any “design an AI assistant that…” prompt.