Multi-user, Multi-session Chat

1"""
2In this example, we have 3 users and 4 sessions.
3
4User 1 has 2 sessions.
5User 2 has 1 session.
6User 3 has 1 session.
7"""
8
9import asyncio
10
11from kern.agent import Agent
12from kern.db.postgres import PostgresDb
13from kern.models.openai import OpenAIResponses
14
15db_url = "postgresql+psycopg://ai:ai@localhost:5532/ai"
16
17db = PostgresDb(db_url=db_url)
18
19user_1_id = "user_1@example.com"
20user_2_id = "user_2@example.com"
21user_3_id = "user_3@example.com"
22
23user_1_session_1_id = "user_1_session_1"
24user_1_session_2_id = "user_1_session_2"
25user_2_session_1_id = "user_2_session_1"
26user_3_session_1_id = "user_3_session_1"
27
28chat_agent = Agent(
29    model=OpenAIResponses(id="gpt-5.2"),
30    db=db,
31    update_memory_on_run=True,
32)
33
34
35async def run_chat_agent():
36    await chat_agent.aprint_response(
37        "My name is Mark Gonzales and I like anime and video games.",
38        user_id=user_1_id,
39        session_id=user_1_session_1_id,
40    )
41    await chat_agent.aprint_response(
42        "I also enjoy reading manga and playing video games.",
43        user_id=user_1_id,
44        session_id=user_1_session_1_id,
45    )
46
47    # Chat with user 1 - Session 2
48    await chat_agent.aprint_response(
49        "I'm going to the movies tonight.",
50        user_id=user_1_id,
51        session_id=user_1_session_2_id,
52    )
53
54    # Chat with user 2
55    await chat_agent.aprint_response(
56        "Hi my name is John Doe.", user_id=user_2_id, session_id=user_2_session_1_id
57    )
58    await chat_agent.aprint_response(
59        "I'm planning to hike this weekend.",
60        user_id=user_2_id,
61        session_id=user_2_session_1_id,
62    )
63
64    # Chat with user 3
65    await chat_agent.aprint_response(
66        "Hi my name is Jane Smith.", user_id=user_3_id, session_id=user_3_session_1_id
67    )
68    await chat_agent.aprint_response(
69        "I'm going to the gym tomorrow.",
70        user_id=user_3_id,
71        session_id=user_3_session_1_id,
72    )
73
74    # Continue the conversation with user 1
75    # The agent should take into account all memories of user 1.
76    await chat_agent.aprint_response(
77        "What do you suggest I do this weekend?",
78        user_id=user_1_id,
79        session_id=user_1_session_1_id,
80    )
81
82
83if __name__ == "__main__":
84    # Chat with user 1 - Session 1
85    asyncio.run(run_chat_agent())
86
87    user_1_memories = chat_agent.get_user_memories(user_id=user_1_id)
88    print("User 1's memories:")
89    assert user_1_memories is not None
90    for i, m in enumerate(user_1_memories):
91        print(f"{i}: {m.memory}")
92
93    user_2_memories = chat_agent.get_user_memories(user_id=user_2_id)
94    print("User 2's memories:")
95    assert user_2_memories is not None
96    for i, m in enumerate(user_2_memories):
97        print(f"{i}: {m.memory}")
98
99    user_3_memories = chat_agent.get_user_memories(user_id=user_3_id)
100    print("User 3's memories:")
101    assert user_3_memories is not None
102    for i, m in enumerate(user_3_memories):
103        print(f"{i}: {m.memory}")