Google ADK Go 1.0 Ships with Native OpenTelemetry, A2A Protocol, and YAML Agent Configuration

Google Developers Blog·medium signal

Google released Agent Development Kit (ADK) for Go 1.0.0 on March 31, marking the Go agent ecosystem's shift from experimental scripts to production services. Key features include native OpenTelemetry integration generating structured traces and spans across model calls and tool execution, YAML-based agent configuration eliminating boilerplate Go code, a plugin system with Retry-and-Reflect self-correction, and human-in-the-loop confirmation flows for sensitive operations. The A2A protocol has been refined for seamless communication between Go, Java, and Python agents with automatic event ordering and response aggregation — completing Google's ADK language coverage across four major runtimes.