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}
}
// Export singleton accessor
const automationController = BrowserAutomationController.getController();
// Compatibility wrapper for existing code
export const sessionManager = {
ensureStagehand: () => automationController.getBrowserClient(),
close: () => automationController.terminate(),
};
```
</details>
Implementation:
- Single browser session across tool calls
- Automatic session expiration and reconnection handling
- 10-minute inactivity cleanup
- Singleton pattern prevents multiple instances
- Resource leak prevention
### BrowserBase Tools
Five tools for web interaction:
![Navigate Tool](https://cdn.voltagent.dev/examples/with-ad-generator/tools.png)
#### Page Navigate Tool
Loads websites and waits for content:
<details>
<summary>Show page-navigate.tool.ts</summary>
```typescript
import { createTool } from "@voltagent/core";
import { z } from "zod";
import { sessionManager } from "../../stagehand-manager";
export const pageNavigateTool = createTool({
name: "page_navigate",
description: "Navigate to a specific URL using BrowserBase",
parameters: z.object({
url: z.string().url().describe("The URL to navigate to"),
waitUntil: z
.enum(["load", "domcontentloaded", "networkidle"])
.optional()
.default("networkidle")
.describe("When to consider navigation complete"),
}),
execute: async ({ url, waitUntil }) => {
try {
const stagehand = await sessionManager.ensureStagehand();
const page = stagehand.page;
await page.goto(url, { waitUntil });
const title = await page.title();
const currentUrl = page.url();
return {
success: true,
url: currentUrl,
title,
message: `Successfully navigated to ${url}`,
};
} catch (error) {
const errorMessage = error instanceof Error ? error.message : String(error);
throw new Error(`Navigation failed: ${errorMessage}`);
}
},
});
```
</details>
Features:
- URL navigation with configurable wait strategies
- Returns page title and final URL after redirects
- Waits for full page load
- Error handling for navigation failures
- Default: `networkidle` wait strategy
#### Page Extract Tool
Extracts structured data from web pages:
<details>
<summary>Show page-extract.tool.ts</summary>
```typescript
import { createTool } from "@voltagent/core";
import { z } from "zod";
import { sessionManager } from "../../stagehand-manager";
export const pageExtractTool = createTool({
name: "page_extract",