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1.33.0 (2026-05-08)

Features

• add BufferableSessionService (0bc767e)
• apigee: allow injecting credentials into ApigeeLlm (ce578ff)
• Make ADK environment tools truncation limit configurable (83ae405)
• models: add get_function_calls and get_function_responses to LlmResponse (22fae7e)

Bug Fixes

• catch genai.ClientError when sandbox is missing (69fa777), closes #5480
• double append bug (f8b4c59)
• Filter out video events with inline data from being stored in session (88421f8)
• fix fork detection, correct offload limits, and add response logging in BigQuery plugin (9d1bb4b)
• hot reload agents for adk web (740557c)
• Only append skills to system instruction if ListSkillsTool isn't available (01f1fc9)
• prevent state_delta overwrite on function_response-only events (fc27203, 211e2ce), closes #3178
• Raise a clear actionable error when CustomAuthScheme lacks a registered AuthProvider (83f9817)
• should use app_name instead of req.app_name (8286066)
• simulation: Add error message when LlmBackedUserSimulator returns empty response (fb92aad)
• Update expressmode api call to include default api key param (e833995)
• use asyncio.sleep to avoid blocking event loop (3a1eadc)
• Use project and location instead of API key when deploying to agent engine (398f28f)

Code Refactoring

• adjust computation of workflow.steps metric and add new unit tests (03d6208)
• remove input.type and output.type attributes from adk metrics (9559968)

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