Arize Phoenix for Claude Agent SDK & LangGraph

Phoenix is an open-source LLM observability platform from Arize, built on OpenTelemetry. OpenInference is the companion spec that defines LLM-specific span attributes (llm.model_name, input.value, tool.name, retrieval.documents.*, …) and ships auto-instrumentors. Any OTLP backend (Datadog, Tempo, Jaeger) also accepts the same spans.

Scope of this skill:

• Claude Agent SDK (claude-agent-sdk Python package — same SDK that powers Claude Code). No auto-instrumentor exists; use the manual wrapper below.
• LangGraph — traced via openinference-instrumentation-langchain (no separate LangGraph package needed).

Packages (exact names)

pip install arize-phoenix                                    # Phoenix server + phoenix.otel / evals / client / experiments
pip install arize-phoenix-otel                               # phoenix.otel.register() helper
pip install openinference-instrumentation-claude-agent-sdk   # auto-instruments the Claude Agent SDK
pip install openinference-instrumentation-langchain          # covers LangChain AND LangGraph
pip install openinference-semantic-conventions               # attribute name constants
pip install opentelemetry-sdk opentelemetry-exporter-otlp
pip install claude-agent-sdk                                 # the Claude Agent SDK itself