Tamper-evident provenance logging for AI agents.

from rootsign import wrap_tools, session
from langchain_core.tools import tool

@tool
def send_invoice(customer_id: str, amount: float) -> str:
    """Send an invoice."""
    return "sent"

async with session(agent_id=agent.agent_id, client=client) as ctx:
    tools = wrap_tools([send_invoice], ctx=ctx)
    # your graph runs here — every tool call is captured