> ## Documentation Index > Fetch the complete documentation index at: https://launchdarkly-preview.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Observability SDKs > This category contains documentation topics explaining the observability capabilities available for LaunchDarkly SDKs. > For the complete documentation index, see [llms.txt](/llms.txt). For the full documentation snapshot, see [llms-full.txt](/llms-full.txt). ## Overview This category contains documentation topics explaining the observability capabilities available for LaunchDarkly SDKs. These include session replay, error monitoring, logging, and tracing. The functionality is available through [observability SDKs](https://github.com/launchdarkly/observability-sdk), which are implemented as plugins to LaunchDarkly server-side and client-side SDKs. You can enable this functionality when you initialize a LaunchDarkly SDK client in your app: * **Observability plugin** for error monitoring, logging, and tracing. Available in both client-side and server-side SDKs. * **Session replay plugin** for session replays. Available in client-side SDKs only. After you initialize the server-side or client-side SDK and one or more observability plugins, your application automatically starts sending observability data back to LaunchDarkly. You can review this information in the LaunchDarkly user interface. To learn how, read the [Observability](/home/observability) product overview. ## Observability SDKs