fix: disable pino to prevent pino-pretty errors in production

[Julianb233]

Summary

• Added disablePino: true to Stagehand constructor to prevent pino-pretty transport errors in production/serverless environments
• The pino-pretty module cannot be loaded in bundled deployments (Vercel, etc.) causing: Error: unable to determine transport target for "pino-pretty"

Test plan

• TypeScript compiles successfully
• Fix verified in compiled output (dist/sessionManager.js)
• End-to-end test passed with real Browserbase sessions
• Logging still works via custom console.error logger

🤖 Generated with Claude Code

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Greptile Overview

Greptile Summary

This PR fixes a production deployment issue in the Browserbase MCP server by disabling pino logging in the Stagehand constructor. The change adds disablePino: true to prevent "unable to determine transport target for 'pino-pretty'" errors that occur in serverless and bundled deployment environments like Vercel. The pino-pretty module is not available in these contexts, causing the application to fail at runtime. The fix maintains logging functionality through the existing custom console.error logger, ensuring the server remains functional in production deployments while resolving the pino-pretty transport error.

Important Files Changed

Filename	Score	Overview
src/sessionManager.ts	5/5	Added disablePino: true to Stagehand constructor to prevent pino-pretty errors in production

Confidence score: 5/5

• This PR is safe to merge with minimal risk as it addresses a specific production deployment issue
• Score reflects a targeted fix for a known compatibility problem with clear documentation and testing
• No files require special attention as the change is minimal and well-documented

Sequence Diagram

sequenceDiagram
    participant User
    participant SessionManager
    participant createStagehandInstance
    participant Stagehand
    participant BrowserbaseAPI

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