Agent Development Kit (ADK) Files

1.16.0 (2025-10-08)

Features

• [Core]
• Implementation of LLM context compaction (e0dd06f)
• Support pause and resume an invocation in ADK (ce9c39f, 2f1040f, 1ee01cc, f005414, fbf7576)
• [Models]
• Add citation_metadata to LlmResponse (3f28e30)
• Add support for gemma model via gemini api (2b5acb9)
• [Tools]
• Add dry_run functionality to BigQuery execute_sql tool (960eda3)
• Add BigQuery analyze_contribution tool (4bb089d)
• Spanner ADK toolset supports customizable template SQL and parameterized SQL (da62700)
• Support Oauth2 client credentials grant type (5c6cdcd)
• Add ReflectRetryToolPlugin to reflect from errors and retry with different arguments when tool errors (e55b894)
• Support using VertexAiSearchTool built-in tool with other tools in the same agent (4485379)
• Support using google search built-in tool with other tools in the same agent (d3148da)
• [Evals]
• Add HallucinationsV1 evaluation metric (8c73d29)
• Add Rubric based tool use metric (c984b9e)
• [UI]
• Adds adk web options for custom logo (822efe0)
• [Observability]
• otel: Switch CloudTraceSpanExporter to telemetry.googleapis.com (bd76b46)

Bug Fixes

• Adapt to new computer use tool name in genai sdk 1.41.0 (c6dd444)
• Add AuthConfig json serialization in vertex ai session service (636def3)
• Added more agent instructions for doc content changes (7459962)
• Convert argument to pydantic model when tool declares it accepts pydantic model as argument (571c802)
• Do not re-create App object when loader returns an App (d5c46e4)
• Fix compaction logic (3f2b457)
• Fix the instruction in workflow_triage example agent (8f3ca03)
• Fixes a bug that causes intermittent pydantic validation errors when uploading files (e680063)
• Handle A2A Task Status Update Event when streaming in remote_a2a_agent (a5cf80b)
• Make compactor optional in Events Compaction Config and add a default (3f4bd67)
• Rename SlidingWindowCompactor to LlmEventSummarizer and refine its docstring (f1abdb1)
• Rollback compaction handling from _get_contents (84f2f41)
• Set max_output_tokens for the agent builder (2e2d61b)
• Set default response modality to AUDIO in run_session (68402bd)
• Update remote_a2a_agent to better handle streaming events and avoid duplicate responses (8e5f361)
• Update the load_artifacts tool so that the model can reliably call it for follow up questions about the same artifact (238472d)
• Fix VertexAiSessionService base_url override to preserve initialized http_options (8110e41, c51ea0b)
• Handle App instances returned by agent_loader.load_agent (847df16)

Improvements

• Migrate VertexAiSessionService to use Agent Engine SDK (90d4c19)
• Migrate VertexAiMemoryBankService to use Agent Engine SDK (d1efc84, 97b950b, 83fd045)
• Add support for resolving $ref and $defs in OpenAPI schemas (a239716)

Documentation

• Update BigQuery samples README (3021266)