autogen/dotnet/website/articles/Create-a-user-proxy-agent.md

UserProxyAgent

UserProxyAgent is a special type of agent that can be used to proxy user input to another agent or group of agents. It supports the following human input modes:

• ALWAYS: Always ask user for input.
• NEVER: Never ask user for input. In this mode, the agent will use the default response (if any) to respond to the message. Or using underlying LLM model to generate response if provided.
• AUTO: Only ask user for input when conversation is terminated by the other agent(s). Otherwise, use the default response (if any) to respond to the message. Or using underlying LLM model to generate response if provided.

Tip

You can also set up humanInputMode when creating AssistantAgent to enable/disable human input. UserProxyAgent is equivalent to AssistantAgent with humanInputMode set to ALWAYS. Similarly, AssistantAgent is equivalent to UserProxyAgent with humanInputMode set to NEVER.

Create a UserProxyAgent with HumanInputMode set to ALWAYS

[!code-csharp]

When running the code, the user proxy agent will ask user for input and use the input as response.