The OneAgent version 1.291 release includes updates on supported versions, breaking changes, new technology support, end-of-support announcements, new features, enhancements, and resolved issues. The oldest supported versions under standard support are 1.273 and under Enterprise Success and Support are 1.267. A significant change involves renaming the rx_pid metric dimension to process.pid, affecting infrastructure observability. The release supports major version 5 and its minor and patch versions, while new technology support includes Azure Messaging Service Bus 7+ and Bunyan 1+ log enrichment. Notable enhancements include signature validation for custom extensions and support for the cpuset.cpus cgroups controller, aiding CPU management in Kubernetes environments. Host-level resource attributes dt.cost.costcenter and dt.cost.product can now be set without requiring an agent restart. The release resolves issues across various components, such as improved detection for .NET vulnerabilities, corrected CPU usage metrics, and fixed IO metrics for network shares. Noteworthy updates include fixes for Python and Java-related problems and changes to RUM Mobile settings for iOS.