chore(main): release 0.8.0

[github-actions]

🤖 I have created a release beep boop

0.8.0 (2026-03-06)

⚠ BREAKING CHANGES

• remove methods with Optional params from VertexCredential.Builder
• remove methods with Optional params from LiveRequest.Builder
• remove deprecated methods accepting Optional params in InvocationContext
• remove deprecated BaseToolset.isToolSelected method
• remove Optional parameters from LlmResponse.Builder's methods
• remove support for legacy transferToAgent, superseded by transfer_to_agent
• Use RxJava for VertexAiClient
• update default agent dir for the compiled agent loader to match old compiler loader behavior
• update basellmflow postprocessing to allow emitting original response prior to generating new events
• Update StreamableHttpServerParameters to avoid SSE mentions and match other MCP builders' structure
• do not silently fail when an internal error occurs
• Allow beforeModelCallback to modify the LLM request
• Integrate Memory Service into ADK runtime

Features

• add GoogleMapsTool to enable Google Maps search integration for Gemini 2 models (1f0425b)
• Add a constructor to McpAsyncToolset to allow injecting McpSessionManager (995aa62)
• Add A2A HTTP E2E demo (467468a)
• Add ApigeeLlm as a model that let's ADK Agent developers to connect with an Apigee proxy (b75608f)
• Add ApigeeLlm as a model that let's ADK Agent developers to connect with an Apigee proxy (b3ca86e)
• add callbacks functionality to the agent executor (7e8f9dc)
• Add code executor (5ffa984)
• Add Compact processor to SingleFlow (ee459b3)
• Add Compaction RequestProcessor for event compaction in llm flow (af1fafe)
• Add ComputerUse tool (d733a48)
• Add ContainerCodeExecutor (a0a1616)
• Add ContextCacheConfig to InvocationContext (968a9a8)
• Add DeepWiki badge to README (2a44d51)
• Add event compaction config to InvocationContext (8f7d7ea)
• Add event compaction framework in Java ADK (dd68c85)
• add eventId in CallbackContext and ToolContext (ac05fde)
• add example on how to expose agent via A2A protocol (e3ea378)
• add ExampleTool to ComponentRegistry (2e1b09f)
• add fromConfig method to LongRunningFunctionTool (43613a4)
• Add GeminiSchemaUtil for converting OpenAPI/MCP JsonSchema to com.google.genai.types.Schema (1945fad)
• Add include_contents option to LlmAgentConfig to control inclusion of previous event contents in LLM requests (2bfbc8f)
• Add MCP Toolset support for agent configuration (bdc39f7)
• add model version to llm response and event (a0af70e)
• add ParallelAgent.fromConfig() (b75608f)
• add ParallelAgent.fromConfig() (8aeee2b)
• add response converters to support multiple A2A client events (4e8de90)
• Add Spring AI 1.1.0 integration to ADK Java (#482) (f0c3c06)
• Add support for configuring agent callbacks in YAML (27c0172)
• Add support for configuring subagents in ADK agents via YAML (d827eae)
• add support for gemini models in VertexAiRagRetrieval (924fb71)
• Add support for programmatic sub-agent resolution using 'code' key (c498d91)
• add support for Streamable HTTP Connections to MCP Tools (bea3244)
• Add support for streaming tools (fe1df53)
• add the AgentExecutor config (e0f7137)
• Add token usage threshold to TailRetentionEventCompactor (9901307)
• Add tokenThreshold and eventRetentionSize to EventsCompactionConfig (588b00b)
• Add url_context_tool to Java ADK (9f887c7)
• Add VertexAiCodeExecutor (e5b1fb3)
• Add VertexAiSearchTool and AgentTools for search (b48b194)
• Added JSON Schema for configurable agents (095eff6)
• Adding a .close() method to Runner, Agent and Plugins (495bf95)
• Adding a Builder for EventsCompactionConfig (05fbcfc)
• Adding a new ArtifactService.saveAndReloadArtifact() method (59e87d3)
• adding a new temporary store of context for callbacks (ed736cd)
• Adding a SessionKey for typeSafety (d899f6f)
• Adding autoCreateSession in Runner (6dd51cc)
• Adding GlobalInstructionPlugin (72e20b6)
• Adding OnModelErrorCallback (dfd2944)
• Adding plugin(Plugin... p) helper methods on App and Runner builders (dc1a192)
• adding resume / event management primitives (2de03a8)
• Adding TODO files for reaching idiomatic java (4ac1dd2)
• Adding validation to BaseAgent (5dfc000)
• Adding validation to BaseAgent and RunConfig (503caa6)
• Adding validation to InvocationContext 'session_service', 'invocation_id', (0502c21)
• Adds mvn google-adk:web ... cli via maven plugin to allow users debug agents with Web UI much easier. (b02c559)
• Adds ReplayPlugin to execute Conformance tests (4b641aa)
• Adds schema definition for the recordings for conformance tests ReplayPlugin and also add a RecordingsLoader to load yaml file (58462fd)
• Adds support for YAML-based basic agents (9723f8a)
• ADK Plugin Base Class (dc29535)
• AgentStaticLoader; like an 🧝 Elve, instead of the 🧙 mage (fixes #149) (5fcd413)
• AgentTool.fromConfig() (c5cbc6d)
• Allow EventsCompactionConfig to have a null summarizer initially (229654e)
• Allow max tokens to be customizable in Claude (bbf38e3)
• config: Adds ComponentRegistry for loading objects in yaml config (55fffb7)
• config: Adds resolveAgentClass, resolveToolInstance and resolveToolClass to ComponentRegistry for resolving the 3 type of components (8c107d2)
• config: Supports loading yaml agents in mvn google-adk@web ... (417a8bc)
• create customMetadata() mutable map in BaseTool (5aa9c83)
• drop gemini-1 support in GoogleSearchTool (15255b4)
• enable LoopAgent configuration (d1a1cea)
• Enforce serializable types for FunctionTools (bd0bb57)
• EventAction.stateDelta() now has a remove by key variant (32a6b62)
• expose meta() and annotations() methods in AbstractMcpTool (04cd6ea)
• Extend google_search support to Gemini 3 in Java ADK (ddb00ef)
• Extend url_context support to Gemini 3 in Java ADK (2c9d4dd)
• Extend url_context support to Gemini 3 in Java ADK (5f5869f)
• Fix a handful of small changes related to headers, logging and javadoc (0b63ca3)
• Forward state delta to parent session (00d6d30)
• Handle final and error TaskStatusUpdateEvents (746e857)
• HITL - remove the events between the confirmed FC & its response (3670555)
• HITL - Revert the "Boolean confirmation" changes, we'll fix it differently (f65e58b)
• HITL/Introduce ToolConfirmations and integrate them into ToolContext (d843e00)
• HITL/Introduce ToolConfirmations and integrate them into ToolContext (b177111)
• HITL/Introduce ToolConfirmations and integrate them into ToolContext (4689ed0)
• HITL/Wire up tool confirmation support (2bfc95d)
• HITL: Declining a proposal now correctly intercepts the run (9611f89)
• HITL: Let ADK resume after HITL approval is present (9611f89)
• Implement automatic tool discovery for config-based agents (a2d9533)
• implement partial event aggregation in RemoteA2AAgent (e064067)
• implement SequentialAgent.fromConfig() (b75608f)
• implement SequentialAgent.fromConfig() (82fbdac)
• Implement tool configuration loading (f27f48c)
• Implementation of a session service for the ADK (Agent Development Kit) that uses Google Firestore as the backend for storing session data. (b75608f)
• Improving LoggingPlugin (acfaa04)
• Include a2a modules in default build (1a3f513)
• Include samples in the build (5091f44)
• Initial tutorials/city-time-weather (6ce41ef)
• Integrate event compaction in Java ADK runner (54c826c)
• Integrate Memory Service into ADK runtime (f4f8309)
• Integrating Plugin with ADK (c037893)
• Introduce ExampleTool for few-shot examples in LlmAgent (2162f89)
• Introduce TailRetentionEventCompactor to compact and retain the tail of the event stream (efe58d6)
• Introduce the App class for defining agentic applications (d7c5c6f)
• introduces context caching configuration for apps, ported from Python ADK (12defee)
• JBang! 💥 🤯 (e10e4f9)
• listSessions returns sessions with empty state (d843e00)
• Make StreamableHttpServerParameters class non-final to allow subclassing (bc3ae43)
• mark a2a module as experimental (626f171)
• maven: Supports using custom/subclass of ComponentRegistry to provide tools for agents (7c7d779)
• new ContextFilterPlugin (f8e9bc3)
• prettier replay diffs (b75608f)
• prettier replay diffs (ae72dde)
• provide more detailed logs when mcp tool declaration failed. (4d5b63a)
• Refactor EventsCompactionConfig to require a summarizer (864d606)
• refactor remote A2A agent to use A2A SDK client (7792233)
• Refactors ADK agent loading with a new AgentLoader interface, add CompiledAgentLoader and AgentStaticLoader implementation, move YAML agent loader support to maven_plugin (0f7904b)
• Refine bug and feature request issue templates (3e74c9a)
• register GoogleMapsTool in ComponentRegistry (464f0b2)
• remove deprecated BaseToolset.isToolSelected method (d2f1145)
• remove deprecated methods accepting Optional params in InvocationContext (88153c8)
• remove methods with Optional params from LiveRequest.Builder (84c62a4)
• remove methods with Optional params from VertexCredential.Builder (0b9057c)
• remove model restrictions in BuiltInCodeExecutionTool (1a593a9)
• remove Optional parameters from LlmResponse.Builder's methods (a3ac436)
• Reorder compaction events in chronological order (66e2296)
• Setting up data structures for pause/resume/rewind (c6c52c4)
• Skip post-invocation compaction if parameters not set (76f86c5)
• SseServerParameters: Add configuration option for connection endpoint (83899b9)
• Support configuring tool execution mode in RunConfig (ad901e2)
• Support configuring tool execution mode in RunConfig (154a7d6)
• Support function calls in LLM event summarizer (55144ac)
• support stdio_connection_params in McpToolset config (cc1588a)
• Support toolFilters in McpAsyncToolset identical to McpToolset (99b767a)
• Supports -DextraPlugins in maven_plugin WebMojo to allow start AdkWebServer with extraPlugin for conformance tests (224552a)
• Supports stateDelta in ADK Java AgentRunRequest for ADK web server (d606ef1)
• Supports stateDelta in ADK Java AgentRunRequest for ADK web server (54bee7b)
• Token count estimation fallback for tail retention compaction (3338565)
• Update AgentExecutor so it builds new runner on execute and there is no need to pass the runner instance (7218295)
• update ConfigAgentLoader to load agents from the current directory (008c196)
• Update event compaction logic to include events after compaction end times (ea12505)
• Update model resolution logic for LLM agents (4fc83f0)
• Update ReadonlyContext to expose the session userId (f19bd99)
• Updating Baseline Code executors (a3f1763)
• updating Telemetry (5ba63f4)
• Updating the Tracing implementation and updating BaseAgent.runLive (8acb1ea)
• use Credentials' request metadata to populate headers (e01df11)

Bug Fixes

• deltaState should be appended with newMessage event and beforeRunCallback should be called after that (c175fe2)
• add missing avgLogprobs, finishReason and usageMetadata fields (4dd09e7)
• Add missing logging for Async MCP Servers (411b6d9)
• Add missing logging for MCP Servers (e2c4d40)
• Add name and description to configagent pom.xml (4948bfc)
• Add OpenTelemetry context propagation to span creation (717d3e4)
• Added httpclient5 dependency to pom.xml to fix ADKWebServer instantiating issue (62eb2ec)
• ADK Session State Serialization error with "removed" sentinels (939de25)
• Align InMemorySessionService listSessions with Python implementation (9434949)
• Allow beforeModelCallback to modify the LLM request (8e10df2)
• Allow injecting ObjectMapper in FunctionTool, default to ObjectMapper (re. #473) (71b1070)
• allow using legacy "transferToAgent(agentName)" to maintain backwards compatibility (5d8f85b)
• Always use a mutable HashMap for default function arguments (c6c9557)
• ApigeeLLM support for Built-in tools like GoogleSearch, BuiltInCodeExecutor when calling Gemini models through Apigee (f0da2b4)
• Avoid ClassCastException and reduce copy/pasta 🍝 in FunctionTool (639b04a)
• avoid timing out slow agents when using the run_sse endpoint (0f4df64)
• Broken Dev UI (fixes #302) (852ebd8)
• change Session events list to a threadsafe implementation by default (0b5ac92)
• Check input validity before appending to example (97f02ab)
• Clarify load_artifact prompt (5f854ba)
• deep-merge stateDelta maps when merging EventActions (ff07474)
• do not silently fail when an internal error occurs (073d5e8)
• do not silently ignore exceptions thrown from runLive() (6b25025)
• downgrade otel.version to 1.51.0 (117fedf)
• drop explicit gemini-1 model version check in GoogleMapsTool (7953503)
• emit multiple LlmResponses in GeminiLlmConnection (7bf55f1)
• Ensure Gemini 3.1 models have events correctly buffered (acffdb9)
• Events for HITL are now emitted correctly (9611f89)
• Exclude model thoughts when saving LLM output to state (44d6a21)
• exclude Thought from being printed as context (40af9bb)
• Exit from rearrangeEventsForLatestFunctionResponse if size of events is less than 2 (5bc3ef8)
• Fix Claude LLM when no tools are provided (fixes #382) (99265cf)
• fix linter error (f49260e)
• Fix the incorrect timestamp in Event (e1214c1)
• Fixed AgentStaticLoader bean registration using ApplicationContextInitializer and resolved OpenTelemetry double initialization in tests (87acdf8)
• Fixed issue where events were marked empty if the first part had an empty text; now checks all parts for meaningful content (a0cba25)
• Fixes the instruction appending logic to be consistent with adk python (1ca24c5)
• Fixing a problem with serializing sessions that broke integration with Vertex AI Session Service (8190ed3)
• Fixing a regression in InMemorySessionService (d11bedf)
• Fixing Vertex session storage (5607f64)
• Flip equals() in LangChain4j for better null safety (d5c98ad)
• Gemini thoughts not correctly accumulated when streaming enabled (2df44de)
• handle state removals when applying stateDelta in BaseSessionService.appendEvent (34151c7)
• HITL endless loop when asking for approvals (9611f89)
• Ignore case when determining if the last message comes from a user (cce4774)
• improve gemini text aggregation in streaming responses (b75608f)
• improve gemini text aggregation in streaming responses (9bb0207)
• Include output schema in MCP tool declarations and add filesystem sample (6d5edd5)
• include usage_metadata events in live postprocessing (8137d66)
• IncludeContents.None not including user message in request (c0302b6)
• Increase default MCP client timeouts to 5 minutes (d46673e)
• initial state for session creation (b75608f)
• initial state for session creation (13db9d2)
• InMemorySessionService mergeWithGlobalState not called in appendEvent (03d043f)
• JavaDoc mistake in ParallelAgent (ff3c803)
• javadocs in ResponseConverter (be35b22)
• live agents using Gemini don't call tools (cca154d)
• LlmAgent model name resolution and improve Gemini-3 model detection logic (313ce85)
• make a mutable copy of function args for the beforeToolCallback invocations (64d3a77)
• Make BaseMemoryService nullable in Runner (2955789)
• Make FunctionResponses respect the order of FunctionCalls (a99c75b)
• Make FunctionTool slightly more null safe, and use Text Blocks (a2295a3)
• make system instructions parts concatenation & identity preprocessor more consistent with python adk version (e06747e)
• make system instructions parts concatenation & identity preprocessor more consistent with python adk version (9360f24)
• Making stepsCompleted thread-safe (d432c64)
• Merging of events in rearrangeEventsForAsyncFunctionResponsesInHistory (67c29e3)
• Mutate EventActions in-place in AgentTool (ded5a4e)
• pass mutable function args map to beforeToolCallback (e989ae1)
• populate finishReason in LlmResponse (dace210)
• prepare JSON serialization for Jackson 2.20.2 and Spring Boot 4.0.2 upgrades (8c6591b)
• preserve other fields of a part when updating function call (b75608f)
• preserve other fields of a part when updating function call (c2c4e46)
• propagate thought signatures in BaseLlmFlow (0b8b35b)
• Propagate trace context across async boundaries (279c977)
• recursively extract input/output schema for AgentTool (7019d39)
• Reduce the logging level (dd601ca)
• Refactor web server components and agent loaders from maven_plugin to dev module (9e3723b)
• refine agent transfer instructions and tool definition (12bf4ef)
• register url_context tool in ComponentRegistry (d9dd5db)
• Remove checking ToolConfirmation from Functions to align with Python SDK (0724330)
• remove client-side function call IDs from LlmRequest (99b5fc2)
• Remove copy/pasta 🍝 in Mcp[Aync]Tool (d972b87)
• Remove GeminiSchemaUtil and use JsonSchema directly in FunctionDeclaration (1a93675)
• Remove network package since it is not used (a3c47bc)
• Remove obsolete @param tags from SessionController Javadoc (a77971a)
• Remove residual web components from maven_plugin (855da19)
• Removed FeatureDecorator class (a678cca)
• Replace @apiNote with <p> in Javadoc comments. (ac16d53)
• restore invocationContext() method (c9e2a5b)
• restore old default method behavior gemini utils (b75608f)
• restore old default method behavior gemini utils (c38ebef)
• Return Completable from saveArtifact in CallbackContext (84e755c)
• revert: Merging of events in rearrangeEventsForAsyncFunctionResponsesInHistory (101adce)
• runAsync handles the async response of sessionService.appendEvent (eb232ee)
• Same GenAI version in langchain4j as in core (6ef972d)
• StreamingToolTest flakiness (bfdf13c)
• support non-map return values returned from Function Tools by automatically wrapping them into {"result": <value>} (85ba370)
• Support parameterized List parameters for Function tools (89fb519)
• tool: Fixes ExitLoopTool by adding Schema and description (0099e5f)
• update ADkWebServer start() to override socket property needed to support Gemini Live API message size (882d4d9)
• Update AgentTool to drop thought parts from response (2a86ae8)
• update basellmflow postprocessing to allow emitting original response prior to generating new events (3e760e0)
• update converters package classes (b66e4a5)
• update default agent dir for the compiled agent loader to match old compiler loader behavior (e43bba7)
• update EmbeddingModelDiscoveryTest package statement (adeb9dc)
• Update HITL/Tool workflows to correctly pause and resume runner operations (2906eb5)
• Update package name to com.example.helloworld (c7d01f0)
• Update pom.xml files (1d47235)
• Update Spring AI to 1.1.0 and disable Ollama tests for CI (03e5d11)
• update test utils for latest GenAI SDK version (1556cc2)
• Updated BasePlugin JavaDoc for name parameter (2e59550)
• Use JsonBaseModel in FunctionTool (re. #473) (e60bddf)
• use SLF4J's logger in FunctionTool exception's handling (de2f64f)

Documentation

• Add GEMINI.md for vibecoding with Gemini CLI (51073d5)
• Adds missing comments (743b85c)
• Adjust heading levels in WebMojo Javadoc (62ed9d8)
• Clarify Code Format and Single Commit on ADK Java CONTRIBUTING (d094cc2)
• Update a parameter name in a comment (5262d4a)
• Update comment in Runner (fe00ef8)
• update ComponentRegistry's doc (441c9a6)
• Update GEMINI.md with style of not using fully qualified name (8911f26)

Miscellaneous Chores

• revert: switch release please secret to use adk-java-releases-bot's token (7eafd1b)
• Update StreamableHttpServerParameters to avoid SSE mentions and match other MCP builders' structure (6f26e30)

Code Refactoring

• remove support for legacy transferToAgent, superseded by transfer_to_agent (c1ccb2e)
• Use RxJava for VertexAiClient (391e049)

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