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The existing Effect Otlp.layerJson (merged via #21387) instruments Effect services but does not register a global OTel tracer provider. The AI SDK's experimental_telemetry reads from the global provider, so its spans were silently dropped. This adds a lightweight BasicTracerProvider bridge that registers globally when OTEL_EXPORTER_OTLP_ENDPOINT is set, using the same endpoint and headers the Effect layer already reads. AI SDK spans (ai.streamText, ai.toolCall, prompt/response content, token counts) now export alongside Effect service spans to any OTLP/HTTP collector. Also enables recordInputs/recordOutputs on both streamText and generateObject call sites so full message content is captured as span attributes.