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a9b6e71966
Enable distributed tracing across protocols that don't support HTTP headers (like SSE) by propagating W3C Trace Context through MCP _meta fields. - Add propagate_context parameter (default: True) to OpenTelemetryMiddleware - Implement _extract_trace_context() to read traceparent/tracestate from request metadata - Implement _inject_trace_context() to write trace context to response metadata - Update all operation handlers to extract parent context and inject into results - Add comprehensive test coverage for context propagation - Update documentation with examples and configuration details This enables trace continuity across MCP calls, allowing clients to link server spans to their traces and propagate context downstream. Co-authored-by: William Easton <strawgate@users.noreply.github.com> |
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