OpenAI tunnel-client v0.0.16 adds MCP response timing and opt-in trace forwarding
OpenAI released tunnel-client v0.0.16, adding optional MCP response timing metadata over stdio and Streamable HTTP, plus opt-in W3C trace context forwarding via a new flag and environment variable. It also updates OpenTelemetry modules from 1.41.0 to 1.43.0 to patch CVE-2026-39883, a local PATH hijacking issue in BSD/Solaris host-ID detection.
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