adk 2026.8.17+2

Command-line interface (CLI) toolchain and unified entrypoint for the Agent Development Kit (ADK) in Dart.

Agent Development Kit (ADK) for Dart (adk)

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adk is the command-line interface (CLI) toolchain and unified entrypoint for the Agent Development Kit (ADK) in Dart.

It bundles the adk command-line executable (adk create, adk run, adk web, adk api_server, adk deploy, adk eval) and provides top-level access to the full ADK Dart runtime via package:adk/adk.dart.

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What's New

• ADK 2.0 Workflows & Managed Agent: Fully exposes upstream ADK 2.0 v2 Workflows and GCP Managed Agent APIs.
• Unified CLI Toolchain: Ships the adk executable entrypoint for global activation (dart pub global activate adk) and local package workflows.
• Unified SDK Entrypoint: Full ADK Dart agent, runner, workflow, and tool APIs accessible through a clean, top-level package namespace.
• MCP-Ready API Surface: Includes MCP-enabled types and toolsets via upstream adk_dart.

Key Features

• Global & Local CLI Toolchain: Run adk create, adk run, adk web, adk api_server, adk deploy, adk eval.
• Complete ADK Runtime: Seamlessly construct Agents, Sequential/Parallel/Loop workflows, LLM providers, and Tools.
• Top-Level Package Namespace: Direct import via import 'package:adk/adk.dart';.

Ecosystem Packages & Roles

• adk (this package): CLI toolchain executable and top-level unified entrypoint for Dart VM and server environments.
• adk_dart: Core SDK runtime library providing the fundamental agent primitives, engine, and multi-agent coordination.
• flutter_adk: Flutter-specific multi-platform plugin providing platform channels, Web-safe runtime surfaces, and UI components.
• adk_mcp: Dedicated MCP (Model Context Protocol) integration package for client and server capabilities.
• adk_litertlm: On-device LLM acceleration package for LiteRT and Gemini Nano runtime on edge devices.

When To Use adk

Use adk when:

• You want to use the adk CLI tool in your terminal (dart pub global activate adk).
• You are developing backend, server-side, or VM Dart applications and want the unified ADK entrypoint.

Use other packages when:

• You are writing Flutter client applications (Mobile/Desktop/Web): use flutter_adk.
• You are building internal modular extensions against the low-level SDK: use adk_dart.

Package Links

• adk: Short-name facade package that exports the ADK Dart API with package:adk/adk.dart.
• adk_dart: Core runtime package that provides the full ADK Dart VM/CLI surface.
• flutter_adk: Flutter-focused package for web-safe multi-platform Flutter integration.

Platform Support Matrix (Current)

Status legend:

• Y Supported
• Partial Partially supported / environment dependent
• N Not supported

Feature / Surface	Dart VM / CLI	Flutter (Android/iOS/Linux/macOS/Windows)	Flutter Web	Notes
Import via package:adk/adk.dart (facade to adk_dart)	Y	Partial	N	Re-exports package:adk_dart/adk_dart.dart (full VM-first surface).
adk CLI executable	Y	N	N	Terminal/VM-only command entrypoint.
Runtime/tool features through facade (MCP, skills, sessions, etc.)	Y	Partial	N	Behavior follows adk_dart full API surface and its platform constraints.
Web-safe entrypoint from this package	N	N	N	adk does not provide adk_core; use flutter_adk or adk_dart/adk_core.dart directly for Web-safe surface.

Feature Support Matrix (Current)

This package is a facade. Runtime behavior comes from adk_dart, and this package mainly provides short import/CLI ergonomics.

Status legend:

• Y Supported
• Partial Partial / integration required
• N Not supported yet

Supported / Working

Area	Feature	Status	Notes
Package role	Short import path (package:adk/adk.dart)	Y	Primary purpose of this package.
API surface	Re-export of adk_dart runtime/tooling APIs	Y	Uses upstream API surface directly.
CLI	adk executable entrypoint forwarding	Y	bin/adk.dart forwards to upstream CLI.
Runtime parity	Feature behavior aligned with adk_dart	Y	Same implementation path as upstream package.

Partial / Not Yet Supported

Area	Feature	Status	Notes
Runtime implementation	Independent runtime implementation in this package	N	adk does not implement runtime itself; it delegates to adk_dart.
Feature divergence	Separate feature set different from adk_dart	N	Feature availability follows upstream adk_dart status.
Release decoupling	Independent publishability from upstream core	Partial	Depends on availability of matching adk_dart hosted versions.

Installation

dart pub add adk

Or with pubspec.yaml:

dependencies:
  adk: ^2026.8.17+1

For local repository development:

dependencies:
  adk:
    path: packages/adk

Then:

dart pub get

Gemini API Key Setup

Use GOOGLE_API_KEY as the primary key environment variable.

GOOGLE_GENAI_USE_VERTEXAI=0
GOOGLE_API_KEY=your_google_api_key

adk_dart also accepts GEMINI_API_KEY as a compatibility alias.

For Vertex AI usage:

GOOGLE_GENAI_USE_VERTEXAI=1
GOOGLE_CLOUD_PROJECT=your-gcp-project-id
GOOGLE_CLOUD_LOCATION=us-central1
GOOGLE_API_KEY=your_google_api_key

Detailed runtime behavior and full setup guidance: adk_dart README

Import

import 'package:adk/adk.dart';

Feature Highlight

Runnable feature-highlight sample (Google Search single agent + coordinator multi-agent):

• example/feature_highlight_agents.dart

Define a single agent

import 'package:adk/adk.dart';

class EchoModel extends BaseLlm {
  EchoModel() : super(model: 'echo');

  @override
  Stream<LlmResponse> generateContent(
    LlmRequest request, {
    bool stream = false,
  }) async* {
    yield LlmResponse(content: Content.modelText('hello from adk'));
  }
}

CLI

Global:

dart pub global activate adk
adk --help

Local package execution:

dart run adk --help

Related Package

• Core implementation package: https://pub.dev/packages/adk_dart
• Repository: https://github.com/adk-labs/adk_dart

License

This project is licensed under Apache 2.0. See LICENSE.