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Pydantic AI is a Python agent framework. To configure tracing with Braintrust, first configure the Braintrust Python SDK with OpenTelemetry support. Then configure OpenTelemetry and enable instrumentation on your agent. 
pip install braintrust[otel] pydantic-ai
pydantic-ai-braintrust.py
from braintrust.otel import BraintrustSpanProcessor
from opentelemetry import trace
from opentelemetry.sdk.trace import TracerProvider
from pydantic_ai.agent import Agent

# Configure the global OTel tracer provider
provider = TracerProvider()
trace.set_tracer_provider(provider)

# Send spans to Braintrust.
provider.add_span_processor(BraintrustSpanProcessor())

# Enable instrumentation on all agents
Agent.instrument_all()

agent = Agent(...)
This will automatically send interactions, tool calls, and performance metrics to Braintrust for monitoring and evaluation.