Uses of Annotation Interface
com.google.adk.annotations.Experimental

Packages that use Experimental

Package	Description
com.google.adk.agents
com.google.adk.apps
com.google.adk.events
com.google.adk.plugins
com.google.adk.runner
com.google.adk.web.service
com.google.adk.workflow

Uses of Experimental in com.google.adk.agents

Classes in com.google.adk.agents with annotations of type Experimental

Modifier and Type	Class	Description
final class	NodeViewAgent	A read-only agent that stands in for a non-agent workflow node so code reading the agent of an app, runner, or invocation keeps working when they run a node.

Methods in com.google.adk.agents with annotations of type Experimental

Modifier and Type	Method	Description
Map<String,Map<String,Object>>	InvocationContext.agentStates()	Returns an unmodifiable view of the per-agent resumability checkpoint states for this invocation, keyed by agent name.
final int	Context.attemptCount()	Returns the number of the attempt this workflow node is on, counting from 1; each retry adds one.
Map<String,Boolean>	InvocationContext.endOfAgents()	Returns an unmodifiable view of the per-agent end-of-agent flags for this invocation, keyed by agent name.
final String	Context.eventAuthor()	Returns the author of the events this workflow node emits, or empty to use the node's name.
final void	Context.eventAuthor(String eventAuthor)	Sets the author of the events this workflow node emits.
com.google.common.collect.ImmutableList<Event>	InvocationContext.events(boolean currentInvocation, boolean currentBranch)	Returns the current session's events, optionally filtered to the current invocation and/or the current branch.
boolean	InvocationContext.isResumable()	Returns whether the current invocation is resumable.
InvocationContext.Builder	InvocationContext.Builder.node(@Nullable Node node)	Sets the workflow node the invocation runs, or null when it runs an agent.
Optional<Node>	InvocationContext.node()	Returns the workflow node this invocation runs, or empty when it runs an agent.
final Optional<Object>	Context.output()	Returns this workflow node's output, which is the output of its useAsOutput child once that child emits one, or empty if it has none.
void	InvocationContext.populateInvocationAgentStates()	Rehydrates InvocationContext.agentStates() and InvocationContext.endOfAgents() from the current invocation's history when this invocation is resumable.
final NodeExecutionState	Context.requireNodeState()	Returns the state of the workflow node run this context belongs to.
boolean	LlmAgent.rerunOnResume()	Returns true, so that a workflow resuming this agent as a node runs it again and its model sees the answers to its long-running calls.
final Map<String,@Nullable Object>	Context.resumeInputs()	Returns the user's answers to the requests for input and long-running calls that this workflow node or its descendants made in an earlier turn, keyed by interrupt ID.
final Optional<com.google.common.collect.ImmutableList<Route>>	Context.routes()	Returns the routes this workflow node selected, or empty if it made no routing decision.
final void	Context.routes(List<? extends Route> routes)	Selects this workflow node's routes, which decide the outgoing edges to follow, replacing any earlier selection.
io.reactivex.rxjava3.core.Flowable<Event>	BaseAgent.runNode(Context context, @Nullable Object nodeInput)	Runs this agent as a workflow node, on the node's branch so the nodes after it see its events.
final io.reactivex.rxjava3.core.Maybe<Object>	Context.runNode(Node node)	Runs node as a child of this workflow node without an input, as Context.runNode(Node, Object, RunNodeConfig) does with the default RunNodeConfig.
final io.reactivex.rxjava3.core.Maybe<Object>	Context.runNode(Node node, @Nullable Object nodeInput)	Runs node as a child of this workflow node, as Context.runNode(Node, Object, RunNodeConfig) does with the default RunNodeConfig.
final io.reactivex.rxjava3.core.Maybe<Object>	Context.runNode(Node node, @Nullable Object nodeInput, RunNodeConfig config)	Returns a Maybe that, when subscribed, runs node as a child of this workflow node and emits the child's output, or completes empty if it has none.
boolean	InvocationContext.shouldPauseInvocation(Event event)	Returns whether to pause the invocation right after this event: it is resumable and the event carries a long-running function call, including a synthetic adk_request_confirmation HITL request.

Constructors in com.google.adk.agents with annotations of type Experimental

Modifier	Constructor	Description
	Context(InvocationContext invocationContext, NodeExecutionState nodeState)	Creates the context of the workflow node run whose state is nodeState.

Uses of Experimental in com.google.adk.apps

Classes in com.google.adk.apps with annotations of type Experimental

Modifier and Type	Class	Description
class	ResumabilityConfig	Resumability config for every agent in an app: pause on a long-running call and resume from the last event.

Methods in com.google.adk.apps with annotations of type Experimental

Modifier and Type	Method	Description
App.Builder	App.Builder.resumabilityConfig(@Nullable ResumabilityConfig resumabilityConfig)
@Nullable ResumabilityConfig	App.resumabilityConfig()
App.Builder	App.Builder.rootNode(@Nullable Node rootNode)	Sets the workflow node the app runs in place of a root agent, or clears it when null.
Optional<Node>	App.rootNode()	Returns the workflow node the app runs, or empty when it runs an agent tree.

Uses of Experimental in com.google.adk.events

Methods in com.google.adk.events with annotations of type Experimental

Modifier and Type	Method	Description
Event.Builder	Event.Builder.isolationScope(@Nullable String value)
Optional<String>	Event.isolationScope()	Returns the isolated conversation this event belongs to, such as a delegated task, so an agent's model history can keep only events from its own scope.
Event.Builder	Event.Builder.nodeInfo(@Nullable NodeInfo value)
Optional<NodeInfo>	Event.nodeInfo()	Identifies the workflow-node activation that emitted this event; outside a workflow, this value is empty or has an empty path.
final Optional<String>	Event.nodeName()	Returns the name of the workflow node that emitted this event, from NodeInfo.name().
Event.Builder	Event.Builder.output(@Nullable Object value)
Optional<Object>	Event.output()	For a workflow node, returns the value handed to successors, distinct from Event.content(), or empty when the event carries no node output.
EventActions.Builder	EventActions.Builder.route(@Nullable List<Route> value)
Optional<com.google.common.collect.ImmutableList<Route>>	EventActions.route()	For a workflow node, returns the routes this event selects; an edge is followed when it has one of these routes.
void	Event.setIsolationScope(@Nullable String isolationScope)
void	Event.setNodeInfo(@Nullable NodeInfo nodeInfo)
void	Event.setOutput(@Nullable Object output)
void	EventActions.setRoute(@Nullable List<Route> route)

Uses of Experimental in com.google.adk.plugins

Classes in com.google.adk.plugins with annotations of type Experimental

Modifier and Type	Class	Description
final class	ReflectAndRetryToolPlugin	Provides self-healing error recovery for tool failures.
static interface	ReflectAndRetryToolPlugin.ResultErrorExtractor	Finds an error that a tool reported in its result instead of throwing.
static enum	ReflectAndRetryToolPlugin.TrackingScope	Defines the lifecycle scope for tracking tool failure counts.

Uses of Experimental in com.google.adk.runner

Methods in com.google.adk.runner with annotations of type Experimental

Modifier and Type	Method	Description
Optional<Node>	Runner.node()	Returns the workflow node this runner runs, or empty when it runs an agent tree.
io.reactivex.rxjava3.core.Flowable<Event>	Runner.runAsync(String userId, String sessionId, @Nullable String invocationId, @Nullable com.google.genai.types.Content newMessage, RunConfig runConfig, @Nullable Map<String,Object> stateDelta)	Runs the agent, resuming an existing invocation instead of starting a new one.

Uses of Experimental in com.google.adk.web.service

Methods in com.google.adk.web.service with annotations of type Experimental

Modifier and Type	Method	Description
Optional<Node>	RunnerService.loadRoot(String appName)	Returns the root that the app appName runs: the workflow node it runs, or else its root agent.

Uses of Experimental in com.google.adk.workflow

Classes in com.google.adk.workflow with annotations of type Experimental

Modifier and Type	Class	Description
class	BaseNode	Base class for nodes in a workflow graph.
final class	DynamicNodeFailedException	An exception that Context.runNode(com.google.adk.workflow.Node) signals when the child node fails.
final record	Edge	A connection between two nodes in a workflow graph.
final class	EdgesBuilder	A builder for the edges of a workflow graph, declared as chains of calls that start at EdgesBuilder.from(com.google.adk.workflow.Node) or EdgesBuilder.fromStart().
static final class	EdgesBuilder.EdgeChain	A chain of edges positioned at a node, started by EdgesBuilder.from(Node), EdgesBuilder.fromStart() or EdgesBuilder.NodeGroupChain.joinTo(com.google.adk.workflow.JoinNode).
static final class	EdgesBuilder.NodeGroupChain	A chain of edges positioned at a node group from a fan-out, EdgesBuilder.from(Node, Node, Node...), or EdgesBuilder.from(Collection), which EdgesBuilder.NodeGroupChain.joinTo(com.google.adk.workflow.JoinNode) connects to a JoinNode.
static final class	EdgesBuilder.RouteMap	A routing map configured in EdgesBuilder.EdgeChain.route(java.util.function.Consumer<? super com.google.adk.workflow.EdgesBuilder.RouteMap>) that maps each route the source node may emit to the nodes it leads to, written r.on("billing").then(billing).
static final class	EdgesBuilder.RouteMapEntry	A routing-map entry started by EdgesBuilder.RouteMap.on(java.lang.String) whose routes have no target yet; EdgesBuilder.RouteMapEntry.then(com.google.adk.workflow.Node, com.google.adk.workflow.Node...) completes it.
static final class	EdgesBuilder.RouteSet	A set of routes that select a single edge, which fires once when its source emits any of them; separate edges to the same target would fire once each.
final class	GraphValidationException	Thrown when a workflow graph is malformed, such as when Start cannot reach a node or a cycle has no routed edge.
final class	JoinNode	A node that waits for every predecessor to complete, then outputs their outputs keyed by predecessor name.
class	NodeConfig	A node's retry policy and execution timeout.
class	NodeExecutionException	Base class for node failures raised by the workflow runtime, such as NodeTimeoutException.
final class	NodeExecutionState	The state of one workflow node run, held by the run's Context.
class	NodeInfo	The identity of the workflow-node activation that emitted an Event.
final class	NodeRunner	The runner for one workflow node, which times out an attempt that exceeds the node's optional timeout and retries the node as its retry policy allows.
final class	NodeTimeoutException	Thrown when a node's attempt outlasts the timeout that NodeConfig.timeout() sets.
final class	ParallelWorkers	Static factories for workflow nodes that run a node once per item of a list input.
class	RequestInput	A node's request for user input, which pauses the workflow until the user answers it.
class	RetryConfig	How a node is retried when it fails.
interface	Route	A value on a workflow edge, and the value a node emits to select which of its outgoing edges are followed.
class	RunNodeConfig	Configuration for running a child node with Context.runNode(com.google.adk.workflow.Node).
final class	Start	The node that marks where a workflow graph starts.
final class	ToolNodes	Static factories for workflow nodes that run a BaseTool, such as an MCP tool or an agent wrapped as a tool.
final class	Workflow	A graph of nodes that is itself a node, so a workflow can go wherever a node can, including in another workflow.
final class	WorkflowConfigurationException	Thrown when a workflow or one of its nodes is declared in a way that cannot run.

Methods in com.google.adk.workflow with annotations of type Experimental

Modifier and Type	Method	Description
default NodeConfig	Node.config()	Returns the node's retry policy and execution timeout.
default Optional<com.google.genai.types.Schema>	Node.inputSchema()	Returns the schema the node's input must match.
default Optional<com.google.genai.types.Schema>	Node.outputSchema()	Returns the schema that the node's output value must match.
default boolean	Node.requiresAllPredecessors()	Returns true if the node runs only once every predecessor has completed, receiving all their outputs keyed by node name, as a fan-in node does.
default boolean	Node.rerunOnResume()	Returns true if a resumed node runs again from scratch, rather than completing with the resuming answer as its output.
static io.reactivex.rxjava3.core.Maybe<Object>	NodeRunner.runChild(Context parent, Node node, @Nullable Object nodeInput, RunNodeConfig config)	Runs node as a child of the node whose context is parent, as Context.runNode(Node, Object, RunNodeConfig) describes.
io.reactivex.rxjava3.core.Flowable<?>	Node.runNode(Context context, @Nullable Object nodeInput)	Runs the node on nodeInput, the output it receives from its predecessors.
static io.reactivex.rxjava3.core.Flowable<Event>	NodeRunner.runRoot(Node node, InvocationContext context, Function<? super Event,? extends io.reactivex.rxjava3.core.Single<Event>> processEvent)	Runs node as the root of context on the invocation's user content, passing each event through processEvent in order; only Runner should call this method.
default Optional<com.google.genai.types.Schema>	Node.stateSchema()	Returns the schema declaring the state keys the node uses.
default boolean	Node.waitForOutput()	Returns true if the node stays re-triggerable until it produces an output or a route, instead of completing when its run completes.