Add go doc for quickstart stream agent

docs/get-started/streaming/index.md

@@ -24,4 +24,11 @@ This page provides quickstart examples to get you up and running with streaming
     [:octicons-arrow-right-24: View Java Streaming Quickstart](quickstart-streaming-java.md) <br>
     <!-- [:octicons-arrow-right-24: View Java Streaming Quickstart](java/quickstart-streaming-java.md)) -->
 
+-   :fontawesome-brands-golang:{ .lg .middle } **Go ADK: Streaming agent**
+
+    ---
+    This example demonstrates how to set up a basic streaming interaction with an agent using Go ADK. It typically involves using the `Runner.RunLive()` method and handling asynchronous events.
+
+    [:octicons-arrow-right-24: View Go Streaming Quickstart](quickstart-streaming-go.md) <br>
+
 </div>

docs/get-started/streaming/quickstart-streaming-go.md

@@ -0,0 +1,176 @@
+# Build a streaming agent with Go
+
+With this quickstart, you'll learn to create a simple agent and use ADK Streaming to enable voice and video communication with it that is low-latency and bidirectional. We will install ADK, set up a basic "Google Search" agent, and run a local server to interact with it using the embedded ADK Web UI.
+
+**Note:** This guide assumes you have experience using a terminal in Linux, Mac, or Windows environments.
+
+## Supported models for voice/video streaming
+
+In order to use voice/video streaming in ADK, you will need to use Gemini models that support the Live API. 
+
+You can find the complete **model ID(s)** that support the Gemini Live API in the documentation:
+
+- [Google AI Studio: Gemini Live API](https://ai.google.dev/gemini-api/docs/models#live-api)
+- [Agent Platform: Gemini Live API](https://docs.cloud.google.com/gemini-enterprise-agent-platform/models/gemini/2-5-flash-live-api)
+
+
+## 1. Set up the platform
+
+Choose a platform from either Google AI Studio or Google Cloud Agent Platform (Vertex AI):
+
+### Option 1: Google AI Studio
+
+1. Get an API key from [Google AI Studio](https://aistudio.google.com/apikey).
+2. Set the environment variables in your terminal:
+
+```bash
+export GOOGLE_GENAI_USE_VERTEXAI=FALSE
+export GOOGLE_API_KEY=PASTE_YOUR_ACTUAL_API_KEY_HERE
+```
+
+### Option 2: Vertex AI / Agent Platform
+
+1. Set up a [Google Cloud project](https://cloud.google.com/vertex-ai/generative-ai/docs/start/quickstarts/quickstart-multimodal#setup-gcp).
+2. Set up the [gcloud CLI](https://cloud.google.com/vertex-ai/generative-ai/docs/start/quickstarts/quickstart-multimodal#setup-local) and authenticate via terminal:
+
+```bash
+gcloud auth login
+```
+
+3. Find your active Google Cloud Project ID with:
+
+```bash
+gcloud config get-value project
+```
+
+4. [Enable the Agent Platform API](https://console.cloud.google.com/flows/enableapi?apiid=aiplatform.googleapis.com).
+5. Set the environment variables in your terminal, updating your project ID and location:
+
+```bash
+export GOOGLE_GENAI_USE_VERTEXAI=TRUE
+export GOOGLE_CLOUD_PROJECT=PASTE_YOUR_ACTUAL_PROJECT_ID
+export GOOGLE_CLOUD_LOCATION=us-central1
+```
+
+## 2. Setup Environment & Install ADK
+
+Create a new directory for your project and initialize a Go module:
+
+```bash
+mkdir adk-streaming
+cd adk-streaming
+go mod init adk-streaming
+```
+
+Install the ADK Go SDK:
+
+```bash
+go get google.golang.org/adk@latest
+```
+
+## 3. Project Structure
+
+Create a single `main.go` file. You do **not** need to copy or host static assets manually since the ADK launcher packages the Web UI for you.
+
+```text
+adk-streaming/
+└── main.go
+```
+
+## 4. Create the Agent and Launcher
+
+Copy-paste the following code into your `main.go` file.
+
+```go
+package main
+
+import (
+	"context"
+	"log"
+	"os"
+
+	"google.golang.org/genai"
+
+	"google.golang.org/adk/agent"
+	"google.golang.org/adk/agent/llmagent"
+	"google.golang.org/adk/cmd/launcher"
+	"google.golang.org/adk/cmd/launcher/full"
+	"google.golang.org/adk/model/gemini"
+	"google.golang.org/adk/tool"
+	"google.golang.org/adk/tool/geminitool"
+)
+
+func main() {
+	ctx := context.Background()
+
+	// Initialize the Gemini model
+	// Configured to dynamically support Google AI Studio or Vertex AI backends
+	var cfg *genai.ClientConfig
+	if apiKey := os.Getenv("GOOGLE_API_KEY"); apiKey != "" {
+		cfg = &genai.ClientConfig{APIKey: apiKey}
+	}
+
+	// Set model ID dynamically based on the platform option chosen:
+	// - For Google AI Studio (Gemini API), use "gemini-2.5-flash-native-audio-preview-12-2025"
+	// - For Vertex AI (Agent Platform), use "gemini-live-2.5-flash-native-audio"
+	modelID := "gemini-2.5-flash-native-audio-preview-12-2025"
+	if os.Getenv("GOOGLE_GENAI_USE_VERTEXAI") == "TRUE" {
+		modelID = "gemini-live-2.5-flash-native-audio"
+	}
+	model, err := gemini.NewModel(ctx, modelID, cfg)
+	if err != nil {
+		log.Fatalf("Failed to create model: %v", err)
+	}
+
+	// Define the agent
+	a, err := llmagent.New(llmagent.Config{
+		Name:        "bidi-demo",
+		Model:       model,
+		Description: "Agent optimized for real-time bidirectional streaming.",
+		Instruction: "You are a helpful voice assistant. Answer questions concisely.",
+		Tools: []tool.Tool{
+			geminitool.GoogleSearch{},
+		},
+	})
+	if err != nil {
+		log.Fatalf("Failed to create agent: %v", err)
+	}
+
+	// Configure the launcher with the agent loader
+	config := &launcher.Config{
+		AgentLoader: agent.NewSingleLoader(a),
+	}
+
+	// Create a full launcher with built-in web and console capabilities
+	l := full.NewLauncher()
+	if err = l.Execute(ctx, config, os.Args[1:]); err != nil {
+		log.Fatalf("Run failed: %v\n\n%s", err, l.CommandLineSyntax())
+	}
+}
+```
+
+## 5. Try the agent
+
+Run the application with the `web`, `api`, and `webui` arguments. This boots up the web server, registers the REST API backend, and serves the ADK Web UI dashboard simultaneously:
+
+```bash
+go run main.go web api webui
+```
+
+Once the server starts, open the Web UI in your browser:
+
+```text
+http://localhost:8080/ui/
+```
+
+### Try with voice and video
+
+Click the microphone button to enable voice input, and ask questions. The agent will respond in real-time via audio.
+If you have a camera enabled, you can also stream video and ask "What do you see?".
+
+### Caveat
+
+- You cannot use text chat with the native-audio models if the model is configured for audio-only input/output in the connection. However, the live API supports both.
+- Ensure you use earphones to prevent echo when using voice input/output.
+
+Congratulations! You've successfully created and interacted with your first Streaming agent using ADK in Go!

mkdocs.yml

@@ -281,6 +281,7 @@ nav:
         - get-started/streaming/index.md
         - Python: get-started/streaming/quickstart-streaming.md
         - Java: get-started/streaming/quickstart-streaming-java.md
+        - Go: get-started/streaming/quickstart-streaming-go.md
       - Code with AI: tutorials/coding-with-ai.md
       - Agent Config: agents/config.md
     - Agents: