revert(examples): keep CrewAI on LiteLLM callbacks

CrewAI manages its own TracerProvider internally, which conflicts
with setting one externally. LiteLLM callbacks remain the correct
integration approach for CrewAI.

Author: richardsolomou

examples/example-ai-crewai/crew.py

@@ -1,25 +1,15 @@
-"""CrewAI with OpenTelemetry instrumentation for tracking."""
+"""CrewAI with PostHog tracking via LiteLLM callbacks."""
 
 import os
-from opentelemetry import trace
-from opentelemetry.sdk.trace import TracerProvider
-from opentelemetry.sdk.trace.export import SimpleSpanProcessor
-from opentelemetry.sdk.resources import Resource, SERVICE_NAME
-from opentelemetry.exporter.otlp.proto.http.trace_exporter import OTLPSpanExporter
-from opentelemetry.instrumentation.crewai import CrewAIInstrumentor
+import litellm
+from crewai import Agent, Task, Crew
 
-resource = Resource(attributes={SERVICE_NAME: "example-crewai-app"})
-exporter = OTLPSpanExporter(
-    endpoint=f"{os.environ.get('POSTHOG_HOST', 'https://us.i.posthog.com')}/i/v0/ai/otel",
-    headers={"Authorization": f"Bearer {os.environ['POSTHOG_API_KEY']}"},
+os.environ["POSTHOG_API_KEY"] = os.environ.get("POSTHOG_API_KEY", "")
+os.environ["POSTHOG_API_URL"] = os.environ.get(
+    "POSTHOG_HOST", "https://us.i.posthog.com"
 )
-provider = TracerProvider(resource=resource)
-provider.add_span_processor(SimpleSpanProcessor(exporter))
-trace.set_tracer_provider(provider)
-
-CrewAIInstrumentor().instrument()
-
-from crewai import Agent, Task, Crew
+litellm.success_callback = ["posthog"]
+litellm.failure_callback = ["posthog"]
 
 researcher = Agent(
     role="Researcher",

examples/example-ai-crewai/pyproject.toml

@@ -3,8 +3,7 @@ name = "example-ai-crewai"
 version = "0.1.0"
 requires-python = ">=3.10"
 dependencies = [
+    "posthog==7.9.12",
     "crewai>=0.80.0",
-    "opentelemetry-instrumentation-crewai>=0.24.0",
-    "opentelemetry-sdk>=1.30.0",
-    "opentelemetry-exporter-otlp-proto-http>=1.30.0",
+    "litellm>=1.50.0",
 ]