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[Release] google/adk-python v2.6.0: v2.6.0

wukathJul 31, 2026

Google ADK Python v2.6.0 introduces significant enhancements for agent development, including per-invocation auth headers for A2A, new evaluation samples, OAuth2 improvements, and telemetry capabilities. Key additions include the ReflectAndRetryModelPlugin for self-healing, OCI Generative AI provider integration, Eventarc Advanced toolset, and ManagedAgent instruction field support. The release also improves CLI functionality with telemetry consent checks, command logging, and enhanced error handling across multiple agent frameworks.

  • Per-invocation auth headers support for A2A agent card fetching enables more flexible authentication scenarios
  • New --extra_packages option for `adk deploy agent_engine` allows custom dependency management during deployment
  • ReflectAndRetryModelPlugin provides self-healing capabilities for model errors, improving agent robustness
  • +7 more key points...
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