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Google ADK

AGENT//CHANGELOG ENGINE

Tracking major feature releases, model weight updates, structural APIs, and developer roadmaps.

[ MAJOR ADVANCEMENT ]v2.9.0

v2.9.0

Changelog 2.9.0 (2026-09-10) Highlights This release focuses on agent resilience and ecosystem integration by introducing automatic model failover, native voice support via LiveKit, and compatibility with MCP SDK 2.x. Models : Safeguard agent uptime by automatically failing over to backup models when the primary model encounters errors. ( c300b8d ) Integrations : Build rich voice and telephony agents using the newly added LiveKit runner. ( f277d91 ) Workflows : Simplify graph workflow management by authoring and loading ADK 2.0 graphs directly from declarative YAML configurations. ( 2a9461b ) ...

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v2.8.0

v2.8.0

2.8.0 (2026-08-25) Features a2a: add native task mode support to RemoteA2aAgent ( 72f3ff5 ) add ADK_MAX_LLM_CALLS environment variable to configure max LLM calls limit ( 75679db ) add create_data_agent tool to data_agent toolset ( 5cd38a0 ) add delete_data_agent tool to data_agent toolset ( 9b451fc ) add location parameter to list_accessible_data_agents in data_agent toolset ( 393ec08 ) add Model Armor guardrail plugin ( 11efc3f ) add nvidia nim integration sample ( c6bba8d ) add sample for skill state injection via adk_inject_state ( 9384127 ) add spreadsheet mime types to load_artifact_tool ...

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v1.39.1

v1.39.1

1.39.1 (2026-08-27) Bug Fixes a2a: Port event action allowlist, agent card description source and resume flattening to v1 ( #6801 ) ( 1f898a6 ) artifacts: Port app-scoped file artifact storage and layout-derived payload paths to v1 ( #6795 ) ( 0ae2bff ) artifacts: Port artifact reference scoping and path-segment validation to v1 ( #6794 ) ( efc5bb8 ) cli: check the Host header on every local API server request (v1) ( #6789 ) ( 15bf230 ) cli: Port deploy ignore-file handling to v1 ( #6793 ) ( 8467bf0 ) close the residual gaps from the v1 backport review ( #6890 ) ( 218061e ) integrations: send ...

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v1.39.0

v1.39.0

1.39.0 (2026-08-17) Features live: use RunConfig.session_resumption.handle when opening a live session ( #6770 ) ( 090869b ) support audio_stream_end for realtime input ( #6699 ) ( 5e3b997 ) Bug Fixes live: stop background tool tasks when a live agent run ends ( #6769 ) ( 5fb5ff1 ) validate session initialization events (v1) ( #6771 ) ( e7dba7a )

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v2.7.1

v2.7.1

Bug Fixes deps: restore the OpenTelemetry 1.42.1 ceiling ( 8e6f361 ) validate session initialization events ( e2b8ace ), closes #5290

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v2.7.0

v2.7.0

2.7.0 (2026-08-13) Highlights A correctness release: most of the work went into what an agent sends to the model and what it gets back, alongside a long tail of fixes across tools, sessions, evaluation and the CLI. Models declare their own capabilities : an agent pairs an output schema with tools when the model actually supports it, instead of ADK inferring support from the model id. ( 2aff82c , dc5dbfa ) Tools can return media : a tool's function response carries images and other media straight back to the model, on Gemini and on Anthropic, LiteLLM, Apigee and OCI alike. ( df9d6de , 703cf43 )...

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v1.38.0

v1.38.0

Features live: forward safety_settings from generate_content_config to the Live API ( #6641 ) ( 99c1aa3 ) Bug Fixes avoid shell execution in ReadFileTool ranged reads and keep local environment file access in workspace ( #6597 ) ( c680728 ) deps: exclude nltk 3.10.1, which breaks venvs living inside the working directory (v1) ( #6607 ) ( f25bb90 ) eval: handle failed inference results without invocations (cherry-pick) ( #6565 ) ( 4555273 ) live: transfer to the target agent regardless of function response order ( #6608 ) ( 302885b ) Port tool confirmation security and re-validation fixes to v1...

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v2.6.3

v2.6.3

Bug Fixes gate --sandbox-launcher behind gcloud beta run deploy ( 8120292 ), closes #6511

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v2.6.2

v2.6.2

2.6.2 (2026-08-03) Bug Fixes cli: update gcloud command to use beta flag ( 9630559 )

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v2.6.1

v2.6.1

2.6.1 (2026-07-30) Features add parent terminal grouping and TTL pruning to ADK CLI telemetry ( 99bbd83 ) capture TTY connectivity in CLI environment telemetry ( c12a025 ) Bug Fixes cli: implement early telemetry recording for long-running web servers and log successful exit code upon routine teardown ( 77726c5 ) Stop re-validating already-consumed tool confirmations ( 2b1204d )

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v1.37.0

v1.37.0

1.37.0 (2026-07-30) Features live: Support asynchronous non-blocking tools ( #6522 ) ( c299420 )

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v2.6.0

v2.6.0

2.6.0 (2026-07-29) Features a2a: support per-invocation auth headers when fetching agent cards ( 3dd1156 ) add --extra_packages option to adk deploy agent_engine ( 93db97d ), closes #3936 Add ADK evaluation samples: shared home-automation agent ( 6ba41ef ) add agent identity auth manager finalize endpoint for 3 legged OAuth flow with auth manager ( 8d2ded3 ) Add basic_criteria ADK eval sample ( fdebd9d ) Add bigquery-graph skill to ADK BigQuery tools ( f1a0a14 ) add capability to log commands run in CLI ( a58220c ) Add custom_metric ADK eval sample ( f71d9df ) Add llm_judge_match ADK eval samp...

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v1.36.2

v1.36.2

1.36.2 (2026-07-21) Bug Fixes Update custom gemini llm connection logic to be used for all 3_x models, not just 3.1 ( #6438 ) ( 4ef72fe )

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[ MAJOR ADVANCEMENT ]v2.5.0

v2.5.0

2.5.0 (2026-07-16) Features add Cloud Run sandbox option in code executors ( 5b1088a ) Add search agents and search MCP severs to agent registry ( ed579c1 ) add skill to verify markdown code snippets ( c0fa51b ) Add strict input schema validation for LlmAgent workflow nodes ( 6f66814 ) add to_mcp_server to serve an ADK agent over MCP ( 50ff37f ) agents: add single_turn mode field to ManagedAgent ( da50578 ) agents: bridge node_input to user_content for ManagedAgent nodes ( a680cea ) agents: support remote MCP servers for ManagedAgent with runtime header callbacks ( 2e2ec09 ) agents: wrap singl...

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1.36.0

Release 1.36.0

1.36.0 (2026-06-22) Features interactions: support for GenAI SDK upgraded to 2.9+ ( #6191 ) ( 7a9152a )

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[ MAJOR ADVANCEMENT ]v2.4.0

v2.4.0

2.4.0 (2026-07-07) Features Add mTLS support for DiscoveryEngineSearchTool ( 8ba0e6a ) Add mTLS support to Google API tools ( 3466586 ) add OpenAI Responses API support in labs ( 6b831d5 ), closes #3209 Add support for reusing an existing SQLAlchemy AsyncEngine in DatabaseSessionService ( f4c7e4c ) add support for session TTL and expiration in Vertex AI session service ( 49d4441 ) adk: add Anthropic effort config handling, thinking parameter propagation, and conflict mitigation ( 4c862b9 ) agents: add ManagedAgent backed by the Managed Agents API ( cf91b84 ) bigquery: expose thinking and tool-...

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1.36.1

Release 1.36.1

1.36.1 (2026-07-06) Bug Fixes exit connection cleanly on expected GoAway signal in bidi streaming (v1) ( #6264 ) ( de2abdf ) Fix Vertex AI Live API session replay on reconnect / modality switch ( #6218 ) ( 4caf782 )

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v2.3.0

v2.3.0

2.3.0 (2026-06-17) Features add create_http_options to ContextCacheConfig for cache creation timeout ( ffc9677 ), closes #4703 add GCS first party toolset to ADK integrations ( fb19e1a ) Add log_level option for adk run CLI ( 1ac69a9 ) Add mTLS support in AgentRegistry client ( 03671c6 ) add request timeout to load_web_page ( 792775f ) core: migrate core and CLI to enterprise parameters ( 68221f0 ) Create GEPARootAgentOptimizer ( 654145a ) eval: expose user_simulator_config in generate_responses ( e7a673c ) gemma4: support Gemma4 in Gemini ( 573f043 ) integrations: Add E2BEnvironment for remot...

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1.35.2

Release 1.35.2

1.35.2 (2026-06-17) Bug Fixes remove live event buffering in runner ( #6151 ) ( afe4083 )

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1.35.1

Release 1.35.1

1.35.1 (2026-06-15) Bug Fixes Only send grounding_metadata for 3.1 live at the end of each turn ( #6129 ) ( 847a259 ) streaming: Ensure final partial=False frame is always yielded ( #6096 ) ( 6e59c61 )

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1.35.0

Release 1.35.0

1.35.0 (2026-06-10) Features live: Handle input transcription differently for Gemini Live 3.1 models ( #6045 ) ( ecfdaf5 ) Bug Fixes add missing Gemini imports in base_llm_flow ( #5943 ) ( 6d027b4 ) flows: Reset reconnect attempts on connection success ( #6042 ) ( 87abf23 ) models: Default grounding metadata for Gemini 3.1 live ( #6018 ) ( fafafb3 ) Support generalized history config injection for Gemini 3.1 Live on Vertex AI ( #5999 ) ( aafd97f )

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[ MAJOR ADVANCEMENT ]v2.2.0

v2.2.0

2.2.0 (2026-06-04) ⚠ BREAKING CHANGES agents: LlmAgent default model changed from gemini-2.5-flash to gemini-3-flash-preview (a preview model), ahead of the 2026-10-16 gemini-2.5-flash shutdown. Agents without an explicit model= now run on the new preview default; set model="gemini-2.5-flash" to retain prior behavior. DEFAULT_LIVE_MODEL is unchanged. ( ad8b6c7 ) interactions: GenAI SDK v2.0.0 support renames the turn-based helpers in interactions_utils.py (e.g. convert_contents_to_turns → convert_contents_to_steps ) and moves from "turns" to "steps" terminology. Update any direct callers. ( da...

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1.34.2

Release 1.34.2

1.34.2 (2026-06-01) Bug Fixes Fix bug where grounding metadata in Gemini 3.1 live was being silently discarded ( 9b6b9e9 ) fix input and output transcription finished events for Gemini v3.1 ( 13763d7 ) tools: Prevent session drop on MCP tool error ( 1fd406b )

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v1.34.1

v1.34.1

1.34.1 (2026-05-22) Bug Fixes Fix bug where grounding metadata in Gemini 3.1 live was being silently discarded ( 9b6b9e9 ) fix input and output transcription finished events for Gemini v3.1 ( 13763d7 ) tools: Prevent session drop on MCP tool error ( 1fd406b )

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[ MAJOR ADVANCEMENT ]v2.1.0

v2.1.0

2.1.0 (2026-05-23) Features Add chart generation and artifact loading to data agent ( db06416 ) Add support for creating sandboxes from templates and snapshots ( cbd14eb ) Add user.id to gen_ai.user.message log records for telemetry ( eb379be ) Fix error message telemetry for tool calls ( e56c021 ) Preserve transcription event order in conversation trajectory ( b3d0759 ) Bug Fixes ci: Add python-dateutil dependency to stale-bot workflow ( 84fa984 ) ci: Prevent workflow failures in relocated adk_team samples ( 55cbc8c ) ci: Use absolute path for PYTHONPATH in upload docs workflow ( 85223e6 ) cl...

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[ MAJOR ADVANCEMENT ]v2.0.0

v2.0.0

2.0.0 (2026-05-19) ADK 2.0 General Availability This release introduces v2.0.0 General Availability (GA) of the Google Agent Development Kit (ADK), establishing production-grade foundations for multi-agent workflows and advanced dynamic agent collaboration. Core Architecture Highlights Multi-Agent Workflow Engine Flexible Execution Graphs: Establishes a model-agnostic engine for orchestrating non-linear, conditional, and cyclical agent execution patterns. Intelligent Task Delegation: Introduces modular workflow abstractions enabling parallel sub-agent workers, nested hierarchical team structur...

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[ MAJOR ADVANCEMENT ]v1.34.0

v1.34.0

1.34.0 (2026-05-18) Features a2a: add support for persistent task stores ( cd78d87 ) add general support for Gemini Live API in ADK evaluate ( 790c9be ) Add mTLS support to Google Cloud Telemetry exporter ( cfe8d2c ) add support for A2aAgentExecutor factory in to_a2a() function ( 115124c ) add support for non-ADK produced input-required events ( 6e53472 ) Added config option to include tool calls/responses in conversation history passed to user simulator ( baf7efb ) ci: add Gemini auto review and invoke workflows ( fd8b492 ) Implement GCPSkillRegistry in ADK ( 88ebd42 ) Implement Skill Registr...

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[ MAJOR ADVANCEMENT ]v1.33.0

v1.33.0

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...

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v1.32.0

v1.32.0

1.32.0 (2026-04-30) Features Add an option to prevent the SaveFilesAsArtifactsPlugin from attaching reference file parts to the message ( 987c809 ) add credentials parameter to BigQueryAgentAnalyticsPlugin ( 34713fb ) Add express mode onboarding support to adk deploy cli ( 2b04996 ) add native OpenTelemetry agentic metrics ( 6942aac ) Add OpenTelemetry tracing for event compaction ( c65dd55 ) Add sample agent demonstrating 2LO, 3LO, and API Key auth via GcpAuthProvider ( 909a8c2 ) Add support for Anthropic's thinking blocks ( 16952bd ) Add support for excluding predefined functions in Computer...

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[ MAJOR ADVANCEMENT ]v2.0.0

v2.0.0b1

2.0.0-beta.1 (2026-04-21) Highlights Transition to Beta : Updated documentation to reflect the project's move to Beta phase ( 84e792fd ). Security Fix : Resolved a potential RCE vulnerability related to nested YAML configurations ( 2b54c4ac ). Documentation & Style : Modularized the ADK style guide and added new topics ( 9bb21795 ). Workflow Orchestration Core : Added the full Workflow(BaseNode) graph orchestration implementation ( c25d86f1 ). Introduced NodeRunner for per-node execution isolation ( 0b3e7043 ). Added DefaultNodeScheduler for standalone node resume via ctx.run_node() ( a68e...

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v1.31.1

v1.31.1

1.32.0 (2026-04-21) Bug Fixes block RCE vulnerability via nested YAML configurations in ADK ( e283ea0 ) bump Vertex SDK version ( 21ebe29 ) Disable bound token for mcp_tool ( d0afddd ) web oauth flow and trace view ( c3dafdb )

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v1.31.0

v1.31.0

1.31.0 (2026-04-16) Features Add "google-adk" user agent to Parameter Manager and Secret Manager clients ( b8e8f6b ) Add support for memories.ingest_events in VertexAiMemoryBankService ( d69477f ) Add Vertex AI Agent Engine Sandbox integration for computer use ( 7686848 ) Firestore support ( 1a9df8f ) live: Add live_session_id to LlmResponse ( bf84e2c ) Bug Fixes Bump minimum mcp version from 1.23.0 to 1.24.0 ( 494c360 ) cli: correct console URL path after adk deploy agent_engine ( 64ed1a6 ), closes #5336 execute on_event_callback before append_event to persist plugin modifications ( 454188d )...

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v1.30.0

v1.30.0

1.30.0 (2026-04-13) Features Add Auth Provider support to agent registry ( f2c68eb ) Add Parameter Manager integration to ADK ( b0715d7 ) Add support for Gemma 4 models in ADK ( 9d4ecbe ), closes #5156 allow users to include artifacts from artifact_service in A2A events using provided interceptor ( e63d991 ) emit a TaskStatusUpdateEvent for ADK events with no output parts but with event.actions ( dcc485b ) Live avatar support in ADK ( a64a8e4 ) live: expose live_session_resumption_update as Event in BaseLlmFlow ( 2626ad7 ), closes #4357 Promote BigQuery tools to Stable ( abcf14c ) samples: add...

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[ MAJOR ADVANCEMENT ]v2.0.0

v2.0.0a3

Features Workflow Orchestration: Added Workflow(BaseNode) graph orchestration implementation, support for lazy scan deduplication and resume for dynamic nodes, partial resume for nested workflows, and state/artifact delta bundling onto yielded events. CLI and Web UI: Added support for Workflow graph visualization in web UI, improved graph readability with distinct icons and shapes, and active node rendering in event graph. Documentation: Added reference documentation for development (skills like adk-style, adk-git, and observability architecture).

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v1.29.0

v1.29.0

Changelog 1.29.0 (2026-04-09) Features Add auth scheme/credential support to MCP toolsets in Agent Registry ( 7913a3b ) add ability to block shell metacharacters in BashTool ( 23bd95b ) add configurable resource limits for subprocesses in BashTool ( 1b05842 ) Add configurable view_prefix to BigQueryLoggerConfig ( 37973da ) Add custom session id functionality to vertex ai session service ( e1913a6 ) Add Description column to SKILL.md and update terminology ( 435f7c7 ) Add Easy GCP support to ADK CLI ( 8850916 ) Add regional endpoint support to SecretManagerClient ( 19ac679 ) Add support for mod...

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v1.28.1

v1.28.1

1.28.1 (2026-04-02) Features live: support live for gemini-3.1-flash-live-preview model ( ee69661 ) Bug Fixes Disallow args on /builder and Add warning about Web UI usage to CLI help ( f037f68 ) live: Buffer tool calls and emit them together upon turn completion ( 081adbd )

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v2.0.0

v2.0.0a2

2.0.0-alpha.2 (2026-03-26) Bug Fixes add agent name validation to prevent arbitrary module imports ( be094f7 ) add protection for arbitrary module imports ( 0019801 ), closes #4947 Default to ClusterIP so GKE deployment isn't publicly exposed by default ( 27aed23 ) enforce allowed file extensions for GET requests in the builder API ( 68ece4e ) Exclude compromised LiteLLM versions from dependencies pin to 1.82.6 ( 79ed953 ) gate builder endpoints behind web flag ( 584283e ) Update eval extras to Vertex SDK package version with constrained LiteLLM upperbound ( a86d0aa )

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v1.28.0

v1.28.0

1.28.0 (2026-03-26) Features a2a: add lifespan parameter to to_a2a() ( 0f4c807 ), closes #4701 Add a new extension for the new version of ADK-A2A integration ( 6f0dcb3 ) Add ability to run individual unit tests to unittests.sh ( b3fcd8a ) Add database_role property to SpannerToolSettings and use it in execute_sql to support fine grained access controls ( 360e0f7 ) Add index to events table and update dependencies ( 3153e6d ), closes #4827 Add MultiTurn Task success metric ( 9a75c06 ) Add MultiTurn Task trajectory and tool trajectory metrics ( 38bfb44 ) Add slack integration to ADK ( 6909a16 ) ...

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v1.27.5

v1.27.5

1.27.5 (2026-03-26) Bug Fixes Update eval extras to Vertex SDK package version with constrained LiteLLM upperbound ( 77928a8 )

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v1.27.4

v1.27.4

1.27.4 (2026-03-24) Bug Fixes Exclude compromised LiteLLM versions from dependencies pin to 1.82.6 ( fa5e707 ) gate builder endpoints behind web flag ( 44b3f72 )

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v1.27.3

v1.27.3

1.27.3 (2026-03-23) Bug Fixes add protection for arbitrary module imports ( 276adfb )

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[ MAJOR ADVANCEMENT ]v2.0.0

v2.0.0a1

Features Introduces two major capabilities: Workflow runtime: graph-based execution engine for composing deterministic execution flows for agentic apps, with support for routing, fan-out/fan-in, loops, retry, state management, dynamic nodes, human-in-the-loop, and nested workflows Task API: structured agent-to-agent delegation with multi-turn task mode, single-turn controlled output, mixed delegation patterns, human-in-the-loop, and task agents as workflow nodes

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v1.27.2

v1.27.2

Bug Fixes Use valid dataplex OAuth scope for BigQueryToolset ( 4010716 ) Store and retrieve usage_metadata in Vertex AI custom_metadata ( b318eee )

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