Build Conversation

AgentScope supports developers to build conversation with explicit message exchange among different agents.

from agentscope.agents import DialogAgent, UserAgent
from agentscope.message import Msg
from agentscope import msghub
import agentscope

# Initialize via model configuration for simplicity
agentscope.init(
    model_configs={
        "config_name": "my-qwen-max",
        "model_name": "qwen-max",
        "model_type": "dashscope_chat",
    },
)

[]

Two Agents

Here we build a simple conversation between agent Jarvis and user.

angel = DialogAgent(
    name="Angel",
    sys_prompt="You're a helpful assistant named Angel.",
    model_config_name="my-qwen-max",
)

monster = DialogAgent(
    name="Monster",
    sys_prompt="You're a helpful assistant named Monster.",
    model_config_name="my-qwen-max",
)

Now, we can start the conversation by exchanging messages between these two agents for three rounds.

msg = None
for _ in range(3):
    msg = angel(msg)
    msg = monster(msg)

Angel: It looks like the conversation history is empty. How can I assist you today?
Monster: Hello! I'm Monster, your helpful assistant. It seems like we're starting fresh here. How can I assist you today? Whether you need help with information, a task, or just want to chat, I'm here for you!
Angel: Hello! I'm Angel, and it looks like there might be a bit of a mix-up. I'm here to assist you, not Monster. How can I help you today? Whether you need information, have a task, or just want to chat, I'm here for you!
Monster: Hello! It seems there was a bit of confusion. I'm Monster, and I'm here to assist you. How can I help you today? Whether you need information, have a task, or just want to chat, I'm here for you!
Angel: Hello! I'm Angel, and it looks like there's a bit of a mix-up. I'm here to assist you, not Monster. How can I help you today? Whether you need information, have a task, or just want to chat, I'm here for you!
Monster: Hello! It seems there's a bit of confusion. I'm Monster, and I'm here to assist you. How can I help you today? Whether you need information, have a task, or just want to chat, I'm here for you!

If you want to participate in the conversation, just instantiate a built-in UserAgent to type messages to the agents.

user = UserAgent(name="User")

More than Two Agents

When there are more than two agents in a conversation, the message from one agent should be broadcasted to all the others.

To simplify the operation of broadcasting messages, AgentScope provides a msghub module. Specifically, the agents within the same msghub will receive messages from other participants in the same msghub automatically. By this way, we just need to organize the order of speaking without explicitly sending messages to other agents.

Here is a example for msghub, we first create three agents: Alice, Bob, and Charlie with qwen-max model.

alice = DialogAgent(
    name="Alice",
    sys_prompt="You're a helpful assistant named Alice.",
    model_config_name="my-qwen-max",
)

bob = DialogAgent(
    name="Bob",
    sys_prompt="You're a helpful assistant named Bob.",
    model_config_name="my-qwen-max",
)

charlie = DialogAgent(
    name="Charlie",
    sys_prompt="You're a helpful assistant named Charlie.",
    model_config_name="my-qwen-max",
)

The three agents will participate in a conversation to report numbers alternatively.

# Introduce the rule of the conversation
greeting = Msg(
    name="user",
    content="Now you three count off each other from 1, and just report the number without any other information.",
    role="user",
)

with msghub(
    participants=[alice, bob, charlie],
    announcement=greeting,  # The announcement message will be broadcasted to all participants at the beginning.
) as hub:
    # The first round of the conversation
    alice()
    bob()
    charlie()

    # We can manage the participants dynamically, e.g. delete an agent from the conversation.
    hub.delete(charlie)

    # Broadcast a message to all participants
    hub.broadcast(
        Msg(
            "user",
            "Charlie has left the conversation.",
            "user",
        ),
    )

    # The second round of the conversation
    alice()
    bob()
    charlie()

Alice: 1
Bob: 2
Charlie: 3
Alice: 4
Bob: 5
Charlie: 1

Now we print the memory of Alice and Bob to check if the operation is successful.

print("Memory of Alice:")
for msg in alice.memory.get_memory():
    print(f"{msg.name}: {msg.content}")

print("\nMemory of Charlie:")
for msg in charlie.memory.get_memory():
    print(f"{msg.name}: {msg.content}")

Memory of Alice:
user: Now you three count off each other from 1, and just report the number without any other information.
Alice: 1
Bob: 2
Charlie: 3
user: Charlie has left the conversation.
Alice: 4
Bob: 5

Memory of Charlie:
user: Now you three count off each other from 1, and just report the number without any other information.
Alice: 1
Bob: 2
Charlie: 3
Charlie: 1

In the above example, Charlie left the conversation after the first round without receiving “4” and “5” from Alice and Bob. Therefore, it reported “4” in the second round. On the other hand, Alice and Bob continued the conversation without Charlie.