The release promotes 12 experimental features to stable status and adds classifier components for workflow routing, including ClassifierNode, LlmClassifier, and a TypesafeClassifier integration for TypeSafe Jev models.
CascadeLive gains barge-in support plus Gemini speech-to-text and text-to-speech integration. ADK also adds experimental MongoDbSessionService and MongoDbMemoryService. The session service can share sessions across runner replicas; the memory service recalls past turns by keyword match and does not require an embedding model or vector index. The release notes claim up to 8x faster execution turns for string-model agents.
The upgrade changes telemetry defaults to OpenTelemetry GenAI semantic conventions v2, otel_semconv_1_44, and removes the call_llm span. Users needing the legacy v1 schema can set ADK_TELEMETRY_SCHEMA_VERSION_OPT_IN=otel_semconv_1_36. The source does not independently establish the claimed performance gain or migration impact for individual deployments. Source: https://github.com/google/adk-python/releases