@arizeai/phoenix-mcp

# OTel contextvars + async generators Why we avoid **contextvars in async generator cleanup** in the Phoenix playground (chat, evaluators, streaming), and how we proved and designed around it. - **[Analysis](otel-contextvars-async.md)** — problem, root cause (CPython/asyncio), fixes, and design decisions. - **Supporting demo** — `contextvars_async_gen_demo.py`: empirical tests (contextvars + async generators, no OTel). Run from repo root: ```bash uv run python internal_docs/vignettes/otel-contextvars-async/contextvars_async_gen_demo.py ```