# ADK v0.0.1-alpha.1 - Table of Contents

Agent Development Kit for Elixir — OTP-native AI agent framework inspired by Google ADK

## Pages

- [ADK — Agent Development Kit for Elixir](readme.md)
- [ADK Elixir — Intentional Differences from Python ADK](intentional-differences.md)
- [Changelog](changelog.md)

- Guides
  - [Getting Started](getting-started.md)
  - [Concepts](concepts.md)
  - [mix adk.new — Project Generator](mix-adk-new.md)
  - [Writing Evaluations for Your Agent](evaluations.md)
  - [Phoenix Integration Guide](phoenix-integration.md)
  - [OTP Supervision Tree](supervision.md)
  - [Oban Integration](oban-integration.md)
  - [ADK Dev Server](dev-server.md)
  - [ADK Web Compatibility Layer](adk-web-compatibility.md)
  - [Deploying ADK Elixir Applications](deployment.md)
  - [ADK Benchmarking Report: Elixir/BEAM vs Python ADK](benchmarks.md)
  - [Agent Design Patterns](agent-patterns.md)
  - [Context Compilation](context-compilation.md)
  - [Context Engineering in ADK Elixir](context-engineering.md)
  - [Human-in-the-Loop (HITL) in ADK Elixir](human-in-the-loop.md)

## Modules

- [ADK.Agent.BaseAgent](ADK.Agent.BaseAgent.md): Shared utilities for all agent types.
- [ADK.Agent.Clone](ADK.Agent.Clone.md): Clone utility for ADK agent structs.
- [ADK.Agent.RemoteA2aAgent](ADK.Agent.RemoteA2aAgent.md): Agent that communicates with a remote A2A agent via A2A client.
- [ADK.AgentConfig](ADK.AgentConfig.md): Load agent configurations from YAML files or strings.
- [ADK.Agents.ContextCacheConfig](ADK.Agents.ContextCacheConfig.md): Configuration for context caching.

- [ADK.ApigeeLlm](ADK.ApigeeLlm.md): Apigee LLM router.
- [ADK.Artifact.Util](ADK.Artifact.Util.md): Utility functions for handling artifact URIs.
- [ADK.Auth](ADK.Auth.md): Authentication subsystem for the Agent Development Kit (ADK).
- [ADK.Auth.CredentialManager](ADK.Auth.CredentialManager.md): Stateless orchestrator for the full OAuth2 / credential lifecycle.
- [ADK.Auth.Exchanger](ADK.Auth.Exchanger.md): Behaviour for credential exchangers.
- [ADK.Auth.Exchanger.OAuth2](ADK.Auth.Exchanger.OAuth2.md): Exchanges OAuth2 credentials from authorization responses.
- [ADK.Auth.Exchanger.Registry](ADK.Auth.Exchanger.Registry.md): Registry for credential exchangers.
- [ADK.Auth.Exchanger.ServiceAccount](ADK.Auth.Exchanger.ServiceAccount.md): Exchanges Google Service Account credentials for an HTTP Bearer token.
Mirrors Python ADK's `ServiceAccountCredentialExchanger`.

- [ADK.Auth.Google](ADK.Auth.Google.md): Google Authentication integration behavior for ADK.
Allows fetching application default credentials or explicit service account tokens.

- [ADK.Auth.Handler](ADK.Auth.Handler.md): Orchestrates the OAuth2 authentication flow for ADK tools.
- [ADK.Auth.OAuth2](ADK.Auth.OAuth2.md): Core OAuth2 HTTP operations: authorization URL generation, auth code exchange,
and token refresh.
- [ADK.Auth.OAuth2.AuthorizationServerMetadata](ADK.Auth.OAuth2.AuthorizationServerMetadata.md): Represents the metadata of an OAuth2 authorization server.

- [ADK.Auth.OAuth2.ProtectedResourceMetadata](ADK.Auth.OAuth2.ProtectedResourceMetadata.md): Represents the metadata of an OAuth2 protected resource.

- [ADK.Auth.OAuth2Discovery](ADK.Auth.OAuth2Discovery.md): Discovers OAuth2 metadata for authorization servers and protected resources.

- [ADK.Auth.Preprocessor](ADK.Auth.Preprocessor.md): Pre-processes auth credential responses before an LLM request.
- [ADK.Auth.Provider](ADK.Auth.Provider.md): Behavior for custom authentication providers.
- [ADK.Auth.ProviderRegistry](ADK.Auth.ProviderRegistry.md): Registry for dynamic auth providers.
- [ADK.Auth.Refresher](ADK.Auth.Refresher.md): Behaviour for credential refreshers.
- [ADK.Auth.Refresher.Registry](ADK.Auth.Refresher.Registry.md): Registry for credential refreshers.
- [ADK.Auth.ToolsetAuth](ADK.Auth.ToolsetAuth.md): Resolves toolset-level authentication before tools are available.
- [ADK.CLI.AgentChangeHandler](ADK.CLI.AgentChangeHandler.md): Decides whether a file change should trigger an agent reload.
- [ADK.Context.Compressor.TokenBudget](ADK.Context.Compressor.TokenBudget.md): Token budget compaction strategy — keeps conversation history within a
configurable token limit.
- [ADK.DevServer.Router](ADK.DevServer.Router.md): Plug router for the ADK development server (`mix adk.server`).
- [ADK.EventCompaction](ADK.EventCompaction.md): The compaction of the events.

- [ADK.Feature](ADK.Feature.md): Feature flag registry for experimental and in-progress features.
- [ADK.Flows.LlmFlows.RequestConfirmation](ADK.Flows.LlmFlows.RequestConfirmation.md): Handles tool confirmation information to build the LLM request.
- [ADK.Flows.LlmFlows.TranscriptionManager](ADK.Flows.LlmFlows.TranscriptionManager.md): Manages transcription events for live streaming flows.

- [ADK.LLM.Gemma](ADK.LLM.Gemma.md): Gemma LLM backend, extending the Gemini backend with Gemma-specific
preprocessing and postprocessing.
- [ADK.LLM.Router](ADK.LLM.Router.md): Smart LLM router with failover across backends/models, exponential backoff,
and rate-limit awareness.
- [ADK.MCP.Toolset](ADK.MCP.Toolset.md): MCP Toolset — connects to an MCP server via stdio and provides its tools
as ADK `FunctionTool` structs.
- [ADK.Memory.Store.VertexAI](ADK.Memory.Store.VertexAI.md): Vertex AI Agent Engine Memory Bank store implementation.
- [ADK.Models.CacheMetadata](ADK.Models.CacheMetadata.md): Metadata for context cache associated with LLM responses.
- [ADK.Models.GeminiContextCacheManager](ADK.Models.GeminiContextCacheManager.md): Manages context cache lifecycle for Gemini models.
- [ADK.Models.InteractionsUtils](ADK.Models.InteractionsUtils.md): Utilities for the Interactions API integration.
- [ADK.Models.LlmRequest](ADK.Models.LlmRequest.md): LLM request struct that allows passing in tools, output schema and system
instructions to the model.

- [ADK.Models.LlmResponse](ADK.Models.LlmResponse.md): LLM response struct that provides the first candidate response from the
model if available. Otherwise, returns error code and message.

- [ADK.Oban.ScheduledJob](ADK.Oban.ScheduledJob.md): Oban worker for recurring/scheduled agent runs via Oban cron.
- [ADK.Phoenix.ControlLive](ADK.Phoenix.ControlLive.md): Phoenix LiveView dashboard for observing ADK agent system state in real-time.
- [ADK.Phoenix.ControlLive.Store](ADK.Phoenix.ControlLive.Store.md): In-memory telemetry event accumulator for the ControlPlane dashboard.
- [ADK.Phoenix.FlowLive](ADK.Phoenix.FlowLive.md): Read-only Phoenix LiveView component for visualizing agent graphs.
- [ADK.Phoenix.LiveSocket](ADK.Phoenix.LiveSocket.md): Handles the `run_live` WebSocket connection for the ADK.

- [ADK.Phoenix.WebServerClient](ADK.Phoenix.WebServerClient.md): HTTP client for interacting with the ADK web server for conformance tests.
- [ADK.Planner](ADK.Planner.md): Behaviour for Agent Planners.
- [ADK.Planner.BuiltIn](ADK.Planner.BuiltIn.md): The built-in planner that uses the model's built-in thinking features.

- [ADK.Planner.PlanReAct](ADK.Planner.PlanReAct.md): Plan-Re-Act planner that constrains the LLM response to generate a plan
before any action/observation.

- [ADK.Plugin.BigQueryAgentAnalytics](ADK.Plugin.BigQueryAgentAnalytics.md): A plugin for logging ADK execution events to Google BigQuery.

- [ADK.Plugin.BigQueryAgentAnalytics.DefaultClient](ADK.Plugin.BigQueryAgentAnalytics.DefaultClient.md)
- [ADK.Plugin.Cache](ADK.Plugin.Cache.md): A simple in-memory response cache plugin using ETS.
- [ADK.Plugin.ContextFilter](ADK.Plugin.ContextFilter.md): A plugin that filters the LLM context to reduce its size.

- [ADK.Plugin.DebugLogging](ADK.Plugin.DebugLogging.md): A plugin that logs debug information for ADK runs, saving states to a file.
Parity with Python's DebugLoggingPlugin.

- [ADK.Plugin.GlobalInstruction](ADK.Plugin.GlobalInstruction.md): Plugin that provides global instructions functionality at the App level.
- [ADK.Plugin.Logging](ADK.Plugin.Logging.md): A plugin that wraps every run with structured log output.
- [ADK.Plugin.MultimodalToolResults](ADK.Plugin.MultimodalToolResults.md): A plugin that modifies function tool responses to support returning list of parts directly.
- [ADK.Plugin.RateLimit](ADK.Plugin.RateLimit.md): A sliding-window rate limiter plugin.
- [ADK.Plugin.ReflectRetryTool](ADK.Plugin.ReflectRetryTool.md): Provides self-healing, concurrent-safe error recovery for tool failures.

- [ADK.Plugin.SaveFilesAsArtifacts](ADK.Plugin.SaveFilesAsArtifacts.md): Intercepts user messages and saves attached files as artifacts.

- [ADK.Policy.HumanApproval](ADK.Policy.HumanApproval.md): A policy that pauses agent execution and requires human approval before
running sensitive tools — Human-in-the-loop (HITL) tool confirmation.
- [ADK.Session.GetSessionConfig](ADK.Session.GetSessionConfig.md)
- [ADK.Session.Migration](ADK.Session.Migration.md): Utilities for database schema version detection and migration.
- [ADK.Session.Store.Ecto.DynamicTermType](ADK.Session.Store.Ecto.DynamicTermType.md): Parity for Python's DynamicPickleType.
- [ADK.Session.Store.VertexAI](ADK.Session.Store.VertexAI.md): Vertex AI Agent Engine Session Service store implementation.

- [ADK.Skill](ADK.Skill.md): A Skill is a reusable bundle of instructions (and optionally tools)
that can be loaded from a directory and mixed into an LlmAgent.
- [ADK.SystemInstruction](ADK.SystemInstruction.md): Renders a system instruction template.

- [ADK.Telemetry.Contract](ADK.Telemetry.Contract.md): Canonical contract for all `:adk.*` telemetry events.
- [ADK.Telemetry.DefaultHandler](ADK.Telemetry.DefaultHandler.md): A simple Logger-based telemetry handler for development.
- [ADK.Telemetry.GoogleCloud](ADK.Telemetry.GoogleCloud.md): Google Cloud OpenTelemetry integration for ADK Elixir.
Parity with adk-python's google.adk.telemetry.google_cloud.

- [ADK.Tool.ApplicationIntegrationTool.ApplicationIntegrationToolset](ADK.Tool.ApplicationIntegrationTool.ApplicationIntegrationToolset.md): ApplicationIntegrationToolset generates tools from a given Application Integration
or Integration Connector resource.

- [ADK.Tool.ApplicationIntegrationTool.Clients.ConnectionsClient](ADK.Tool.ApplicationIntegrationTool.Clients.ConnectionsClient.md)
- [ADK.Tool.ApplicationIntegrationTool.Clients.IntegrationClient](ADK.Tool.ApplicationIntegrationTool.Clients.IntegrationClient.md)
- [ADK.Tool.ApplicationIntegrationTool.IntegrationConnectorTool](ADK.Tool.ApplicationIntegrationTool.IntegrationConnectorTool.md)
- [ADK.Tool.Approval](ADK.Tool.Approval.md): GenServer that manages pending human approval requests for tool calls.
- [ADK.Tool.BashTool](ADK.Tool.BashTool.md): Tool to execute bash commands.
- [ADK.Tool.BigQuery.Client](ADK.Tool.BigQuery.Client.md): A client for BigQuery in ADK Elixir.
Provides configuration and default user agents for BigQuery and Dataplex clients.

- [ADK.Tool.BigQuery.CredentialsConfig](ADK.Tool.BigQuery.CredentialsConfig.md): BigQuery Credentials Configuration for Google API tools (Experimental).
- [ADK.Tool.BigQuery.DataInsightsTool](ADK.Tool.BigQuery.DataInsightsTool.md): Answers questions about structured data in BigQuery tables using natural language.

- [ADK.Tool.BigQuery.SearchTool](ADK.Tool.BigQuery.SearchTool.md): Finds BigQuery datasets and tables using natural language semantic search via Dataplex.

- [ADK.Tool.Bigtable.CredentialsConfig](ADK.Tool.Bigtable.CredentialsConfig.md): Bigtable Credentials Configuration for Google API tools (Experimental).
- [ADK.Tool.Confirmation](ADK.Tool.Confirmation.md): Represents a tool confirmation configuration.
- [ADK.Tool.DataAgent.CredentialsConfig](ADK.Tool.DataAgent.CredentialsConfig.md): Credentials Configuration for Data Agent tools.
- [ADK.Tool.DataAgent.DataAgentTool](ADK.Tool.DataAgent.DataAgentTool.md): A tool returned by DataAgentToolset.
- [ADK.Tool.DataAgent.DataAgentToolset](ADK.Tool.DataAgent.DataAgentToolset.md): Data Agent Toolset contains tools for interacting with data agents.

- [ADK.Tool.DataAgent.ToolConfig](ADK.Tool.DataAgent.ToolConfig.md): Configuration for Data Agent tools.
- [ADK.Tool.ExitLoop](ADK.Tool.ExitLoop.md): Built-in tool that allows an LLM inside a `LoopAgent` to break out of the loop.
- [ADK.Tool.GoogleApiTool.GoogleApiToOpenApiConverter](ADK.Tool.GoogleApiTool.GoogleApiToOpenApiConverter.md): Converts Google API Discovery documents to OpenAPI v3 format.

- [ADK.Tool.LongRunningTool](ADK.Tool.LongRunningTool.md): An asynchronous tool that executes work in a supervised BEAM process.
- [ADK.Tool.OpenApiTool.Auth.AuthHelpers](ADK.Tool.OpenApiTool.Auth.AuthHelpers.md): Authentication helpers for OpenAPI tools.
Mirrors Python ADK's `google.adk.tools.openapi_tool.auth.auth_helpers`.

- [ADK.Tool.OpenApiTool.OpenApiToolset](ADK.Tool.OpenApiTool.OpenApiToolset.md): Tool set that generates tools from an OpenAPI specification.

- [ADK.Tool.OpenApiTool.RestApiTool](ADK.Tool.OpenApiTool.RestApiTool.md): A tool that represents a single operation from an OpenAPI specification.

- [ADK.Tool.OpenApiTool.SpecParser](ADK.Tool.OpenApiTool.SpecParser.md): Parses an OpenAPI specification into a list of operations.

- [ADK.Tool.OpenApiTool.SpecParser.ApiParameter](ADK.Tool.OpenApiTool.SpecParser.ApiParameter.md)
- [ADK.Tool.OpenApiTool.SpecParser.OperationEndpoint](ADK.Tool.OpenApiTool.SpecParser.OperationEndpoint.md)
- [ADK.Tool.OpenApiTool.SpecParser.ParsedOperation](ADK.Tool.OpenApiTool.SpecParser.ParsedOperation.md)
- [ADK.Tool.Toolset](ADK.Tool.Toolset.md): Behaviour for toolsets — collections of tools that may require
authentication before their tools can be used.
- [ADK.Utils.Common](ADK.Utils.Common.md): Core common utility functions.
Includes formatting, date/time utilities, and map manipulation functions.

- [ADK.Workflow](ADK.Workflow.md): Graph-based workflow executor for composing agents into DAGs.
- [ADK.Workflow.Checkpoint](ADK.Workflow.Checkpoint.md): Checkpoint behaviour for persisting workflow execution state.
- [ADK.Workflow.Checkpoint.EctoStore](ADK.Workflow.Checkpoint.EctoStore.md): Ecto-backed checkpoint store for durable workflow state persistence.
- [ADK.Workflow.Checkpoint.EtsStore](ADK.Workflow.Checkpoint.EtsStore.md): ETS-backed checkpoint store for fast in-process workflow state persistence.
- [ADK.Workflow.Collaboration](ADK.Workflow.Collaboration.md): Collaboration modes for workflow fan-out nodes.
- [ADK.Workflow.Executor](ADK.Workflow.Executor.md): Graph traversal and execution engine for workflows.
- [ADK.Workflow.Graph](ADK.Workflow.Graph.md): Graph data structure for workflow definitions.
- [ADK.Workflow.Retry](ADK.Workflow.Retry.md): Per-node retry logic for workflow steps.
- [ADK.Workflow.Step](ADK.Workflow.Step.md): Represents a single workflow step with support for execution and compensation.

- [Adk.Agents.InstructionProvider](Adk.Agents.InstructionProvider.md)
- [Adk.Agents.McpInstructionProvider](Adk.Agents.McpInstructionProvider.md): Instruction provider that fetches a prompt from an MCP server.

- [Adk.Agents.ReadonlyContext](Adk.Agents.ReadonlyContext.md)
- [Adk.Mcp.SessionManager](Adk.Mcp.SessionManager.md)
- [Adk.Mcp.SessionManagerImpl](Adk.Mcp.SessionManagerImpl.md): Default stub implementation of `Adk.Mcp.SessionManager`.
- [Adk.ReadonlyContext](Adk.ReadonlyContext.md): A read-only snapshot of invocation context for instruction providers.
- [Adk.WebServer.Cors](Adk.WebServer.Cors.md)

- Core
  - [ADK](ADK.md): The main entry point for ADK Elixir.
  - [ADK.Agent](ADK.Agent.md): The core agent protocol. Every agent type implements this.
  - [ADK.Context](ADK.Context.md): Invocation context threaded through the agent pipeline.
  - [ADK.Event](ADK.Event.md): Represents an event in the ADK.

  - [ADK.Tool](ADK.Tool.md): The tool behaviour. Tools are functions that agents can call.

  - [ADK.ToolContext](ADK.ToolContext.md): Context passed to tool execution, providing access to session state,
artifacts, credentials, and agent transfer capabilities.

- Agents
  - [ADK.Agent.Custom](ADK.Agent.Custom.md): A simple agent that wraps a function. Useful for testing and ad-hoc agents.
  - [ADK.Agent.LlmAgent](ADK.Agent.LlmAgent.md): An LLM-powered agent that calls a language model to generate responses,
handles tool calls, and loops until a final text response is produced.
  - [ADK.Agent.LoopAgent](ADK.Agent.LoopAgent.md): Runs sub-agents in a loop until a maximum number of iterations is reached,
an exit_condition returns true, or an agent signals escalation via `EventActions.escalate`.
  - [ADK.Agent.ParallelAgent](ADK.Agent.ParallelAgent.md): Runs sub-agents concurrently using `Task.async_stream`, collecting all events.
  - [ADK.Agent.SequentialAgent](ADK.Agent.SequentialAgent.md): Runs sub-agents in sequence, passing state through the session.

- Tools
  - [ADK.Tool.BuiltInCodeExecution](ADK.Tool.BuiltInCodeExecution.md): Built-in Code Execution tool for Gemini models.
  - [ADK.Tool.Declarative](ADK.Tool.Declarative.md): Macro-based tool declaration using `@tool` module attributes.
  - [ADK.Tool.FunctionTool](ADK.Tool.FunctionTool.md): Wraps any function as a tool with declaration metadata.
  - [ADK.Tool.GoogleSearch](ADK.Tool.GoogleSearch.md): Built-in Google Search tool for Gemini models.
  - [ADK.Tool.ModuleTool](ADK.Tool.ModuleTool.md): A tool backed by a module instead of an anonymous function.
  - [ADK.Tool.SearchMemoryTool](ADK.Tool.SearchMemoryTool.md): Built-in tool that lets agents search long-term memory.
  - [ADK.Tool.TransferToAgent](ADK.Tool.TransferToAgent.md): Built-in tool that enables an agent to transfer control to a sub-agent.
  - [ADK.Tool.TransferTool](ADK.Tool.TransferTool.md): Auto-generated tool for transferring control to a sub-agent.

- LLM Backends
  - [ADK.LLM](ADK.LLM.md): LLM behaviour and mock implementation for testing.
  - [ADK.LLM.Anthropic](ADK.LLM.Anthropic.md): Anthropic Claude LLM backend using the Messages API via Req.
  - [ADK.LLM.CircuitBreaker](ADK.LLM.CircuitBreaker.md): Simple circuit breaker for LLM calls using GenServer.
  - [ADK.LLM.Gemini](ADK.LLM.Gemini.md): Gemini LLM backend using the REST API via Req.
  - [ADK.LLM.Mock](ADK.LLM.Mock.md): Mock LLM that echoes input or uses pattern matching.
  - [ADK.LLM.OpenAI](ADK.LLM.OpenAI.md): OpenAI-compatible LLM backend using the chat completions API via Req.
  - [ADK.LLM.Retry](ADK.LLM.Retry.md): Retry wrapper for LLM calls with exponential backoff and jitter.

- Sessions & State
  - [ADK.EventActions](ADK.EventActions.md): Actions attached to an event — state deltas, transfers, escalation.
  - [ADK.RunConfig](ADK.RunConfig.md): Configuration struct for controlling Runner execution behavior.
  - [ADK.Session](ADK.Session.md): Session GenServer — one process per active session.
  - [ADK.Session.Store](ADK.Session.Store.md): Behaviour for session persistence stores.
  - [ADK.Session.Store.Ecto](ADK.Session.Store.Ecto.md): Ecto-backed session store.
  - [ADK.Session.Store.InMemory](ADK.Session.Store.InMemory.md): ETS-backed in-memory session store.
  - [ADK.Session.Store.JsonFile](ADK.Session.Store.JsonFile.md): File-based JSON session store.
  - [ADK.State.Delta](ADK.State.Delta.md): Immutable snapshot + diff for state delta tracking.

- Memory
  - [ADK.Memory.Entry](ADK.Memory.Entry.md): A single memory entry.
  - [ADK.Memory.InMemory](ADK.Memory.InMemory.md): ETS-backed in-memory memory store for development and testing.
  - [ADK.Memory.Store](ADK.Memory.Store.md): Behaviour for memory services.

- Context & Compression
  - [ADK.Context.Compressor](ADK.Context.Compressor.md): Behaviour for context compression strategies.
  - [ADK.Context.Compressor.SlidingWindow](ADK.Context.Compressor.SlidingWindow.md): Sliding window strategy — keeps system messages plus the last N messages,
with awareness of function call/response pairs.
  - [ADK.Context.Compressor.Summarize](ADK.Context.Compressor.Summarize.md): Summarization strategy — uses an LLM to condense older messages.
  - [ADK.Context.Compressor.Truncate](ADK.Context.Compressor.Truncate.md): Simple truncation strategy — keeps system messages and the last N messages.

- Artifacts
  - [ADK.Artifact.GCS](ADK.Artifact.GCS.md): Google Cloud Storage artifact backend.
  - [ADK.Artifact.InMemory](ADK.Artifact.InMemory.md): In-memory artifact store backed by an Agent process.
  - [ADK.Artifact.Store](ADK.Artifact.Store.md): Behaviour for pluggable artifact storage backends.

- Auth
  - [ADK.Auth.Config](ADK.Auth.Config.md): Declares authentication requirements for a tool.
  - [ADK.Auth.Credential](ADK.Auth.Credential.md): Represents an authentication credential.
  - [ADK.Auth.CredentialStore](ADK.Auth.CredentialStore.md): Behaviour for pluggable credential storage backends.
  - [ADK.Auth.InMemoryStore](ADK.Auth.InMemoryStore.md): In-memory credential store using an Agent process.

- Runner
  - [ADK.Runner](ADK.Runner.md): Orchestrates agent execution — creates sessions, runs agents, collects events.

  - [ADK.Runner.Async](ADK.Runner.Async.md): Runs an agent asynchronously under `ADK.RunnerSupervisor` (Task.Supervisor),
sending events back to the caller as `{:adk_event, event}` messages.

- A2A Protocol
  - [ADK.A2A.AgentCard](ADK.A2A.AgentCard.md): Generates an A2A Agent Card from an ADK agent.
  - [ADK.A2A.Client](ADK.A2A.Client.md): A2A protocol client — delegates to `A2A.Client` from the
[a2a](https://github.com/zeroasterisk/a2a-elixir) package.
  - [ADK.A2A.Message](ADK.A2A.Message.md): Converts between ADK Events and A2A protocol messages.
  - [ADK.A2A.RemoteAgentTool](ADK.A2A.RemoteAgentTool.md): Wraps a remote A2A agent as an ADK tool.
  - [ADK.A2A.Server](ADK.A2A.Server.md): A2A protocol server for ADK agents, implemented as a Plug.

- Phoenix Integration
  - [ADK.Phoenix.Channel](ADK.Phoenix.Channel.md): A `use`-able module that adds ADK agent interaction to a Phoenix Channel.
  - [ADK.Phoenix.ChatLive](ADK.Phoenix.ChatLive.md): Production-quality Phoenix LiveView chat interface for ADK agents.
  - [ADK.Phoenix.Controller](ADK.Phoenix.Controller.md): Helper functions for building Phoenix controllers that interact with ADK agents.
  - [ADK.Phoenix.LiveHandler](ADK.Phoenix.LiveHandler.md): A `use`-able module that adds ADK agent interaction to a Phoenix LiveView.
  - [ADK.Phoenix.WebRouter](ADK.Phoenix.WebRouter.md): Plug router providing Python ADK-compatible HTTP endpoints.

- Plugins
  - [ADK.Plugin](ADK.Plugin.md): Global plugin behaviour for intercepting the Runner pipeline.
  - [ADK.Plugin.ReflectRetry](ADK.Plugin.ReflectRetry.md): A plugin that validates LLM responses and retries with reflection feedback
when they don't meet quality criteria.
  - [ADK.Plugin.Registry](ADK.Plugin.Registry.md): Agent-based registry for global plugins.

- MCP
  - [ADK.MCP.Client](ADK.MCP.Client.md): MCP (Model Context Protocol) client over stdio transport.
  - [ADK.MCP.ToolAdapter](ADK.MCP.ToolAdapter.md): Converts MCP server tools into ADK `FunctionTool` structs.

- Oban
  - [ADK.Oban.AgentWorker](ADK.Oban.AgentWorker.md): Oban worker for durable agent execution.

- Policies
  - [ADK.Policy](ADK.Policy.md): Policy behaviour for agent governance — tool access control, content filtering, etc.
  - [ADK.Policy.DefaultPolicy](ADK.Policy.DefaultPolicy.md): A permissive default policy that allows everything and passes content through unchanged.

- Eval
  - [ADK.Eval](ADK.Eval.md): Evaluation framework for testing agent quality.
  - [ADK.Eval.Case](ADK.Eval.Case.md): Defines a single evaluation test case.
  - [ADK.Eval.Report](ADK.Eval.Report.md): Summary report of an evaluation run.
  - [ADK.Eval.Result](ADK.Eval.Result.md): Result of evaluating a single test case.
  - [ADK.Eval.Scorer](ADK.Eval.Scorer.md): Behaviour for evaluation scorers.
  - [ADK.Eval.Scorer.Contains](ADK.Eval.Scorer.Contains.md): Scores 1.0 if the response text contains the given substring.
  - [ADK.Eval.Scorer.ExactMatch](ADK.Eval.Scorer.ExactMatch.md): Scores 1.0 if the response text exactly matches the expected text.
  - [ADK.Eval.Scorer.ResponseLength](ADK.Eval.Scorer.ResponseLength.md): Scores based on whether response length is within a min/max character range.
  - [ADK.Eval.Scorer.ToolUsed](ADK.Eval.Scorer.ToolUsed.md): Scores 1.0 if the agent called a specific tool (function) by name.

- Telemetry
  - [ADK.Telemetry](ADK.Telemetry.md): Telemetry events for the ADK pipeline.
  - [ADK.Telemetry.DebugHandler](ADK.Telemetry.DebugHandler.md): Telemetry handler that captures ADK events into `ADK.Telemetry.SpanStore`.
  - [ADK.Telemetry.SpanStore](ADK.Telemetry.SpanStore.md): ETS-backed store for debug/trace span data.

- Internal
  - [ADK.Application](ADK.Application.md): OTP Application for ADK.
  - [ADK.Callback](ADK.Callback.md): Callback hooks for agent, model, and tool invocations.
  - [ADK.InstructionCompiler](ADK.InstructionCompiler.md): Compiles the system instruction for an LLM agent by combining

## Mix Tasks

- Mix Tasks
  - [mix adk.gen.migration](Mix.Tasks.Adk.Gen.Migration.md): Generates an Ecto migration for the ADK sessions table.
  - [mix adk.new](Mix.Tasks.Adk.New.md): Creates a new ADK agent project.
  - [mix adk.server](Mix.Tasks.Adk.Server.md): Starts an ADK development server with a browser-based chat UI.