Migrating from LangSmith to TraceCraft

pip install tracecraft
# or
uv add tracecraft

import os
os.environ["LANGCHAIN_TRACING_V2"] = "true"
os.environ["LANGCHAIN_API_KEY"] = "ls_..."
 
from langchain_openai import ChatOpenAI
llm = ChatOpenAI()

import tracecraft
from tracecraft.adapters.langchain import TraceCraftCallbackHandler
 
# Initialize TraceCraft
tracecraft.init(console=True, jsonl=True)
 
# Use the callback handler
handler = TraceCraftCallbackHandler()
llm = ChatOpenAI()
 
# Pass handler to invoke
result = llm.invoke("Hello", config={"callbacks": [handler]})

chain = prompt | llm | parser
result = chain.invoke({"query": "test"})

from tracecraft.core.context import run_context
from tracecraft.core.models import AgentRun
from datetime import UTC, datetime
 
handler = TraceCraftCallbackHandler()
run = AgentRun(name="my_chain", start_time=datetime.now(UTC))
 
with run_context(run):
    result = chain.invoke(
        {"query": "test"},
        config={"callbacks": [handler]}
    )

from tracecraft.exporters.otlp import OTLPExporter
 
otlp = OTLPExporter(
    endpoint="http://localhost:4317",
    service_name="my-app"
)
 
tracecraft.init(exporters=[otlp])