Copilot CLI puts an OpenTelemetry traceparent inside hook inputs.

v1.0.81 (August 27) lists MCP 2026-07-28 support across CLI, SDK, IDE and in-memory clients, and hooks now receive the current OTel trace context: inputs gain traceparent plus tracestate when the span carries vendor state, and command hooks get matching env vars, so hook work emits spans correlated to the agent turn that triggered it. Windows machines can sign into Entra-protected remote MCP servers through WAM with usually no prompt. (GitHub) First hook API I've seen that makes agent runs traceable end to end without wrapping everything in a script.