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By default, Openlayer treats each request as a standalone trace. With users and sessions, you can connect those traces into journeys — making it easier to see how people interact with your system across time. Sessions and users A session represents a series of related interactions (e.g., a multi-turn chatbot conversation). While a user is the individual behind one or more sessions, identified by an ID. In the Openlayer UI, you can filter and group traces by session_id or user_id to:
  • Inspect full conversation threads.
  • Track user journeys end-to-end.
  • Identify problematic patterns tied to specific users or flows.

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How add session and user

There are two ways to attach user/session information:

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1. Set default context

Set the context once (e.g., in middleware) and all traces created in that request will inherit it. 
from openlayer.lib import set_user_session_context, clear_user_session_context

# In your middleware or request handler
def handle_request(request): # Extract user and session from your authentication system
    user_id = get_user_id_from_request(request)
    session_id = get_session_id_from_request(request)

    # Set default context for all traces in this request
    set_user_session_context(user_id=user_id, session_id=session_id)

    try:
        # Your application logic with traced functions
        result = process_user_request(request.data)
        return result
    finally:
        # Clean up context when request is complete
        clear_user_session_context()

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2. Override context for specific traces

If you only want to set context for certain traces, use update_trace_user_session(). 
from openlayer.lib import update_trace_user_session

@trace()
def process_request():
    update_trace_user_session(
        user_id="different_user_123",
        session_id="different_session_123"
    )
    return "result"