pass stagehand, instead of stagehandPage to agent

[tkattkat]

why

currently we pass stagehand page to agent, this results in our page management having issues when facing new tabs

what changed

the stagehand object is now passed instead of stagehandPage

test plan

tested locally

[changeset-bot]

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Latest commit: 3ea4178

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[greptile-apps]

Greptile Summary

This PR refactors the agent tool architecture to pass the full Stagehand instance instead of the StagehandPage instance to agent tools. This change improves page management capabilities when handling new tabs and provides tools with access to the complete Stagehand API surface.

Key Changes:

• Updated all agent tool creation functions to accept Stagehand instead of StagehandPage
• Modified StagehandAgentHandler constructor and createTools() method to use the new parameter type
• Updated tool implementations to access page functionality via stagehand.page instead of direct stagehandPage calls
• Removed deprecated screenshot evaluation test file
• Cleaned up screenshot-related type definitions that are no longer needed

Impact:

• Enables better handling of multi-tab scenarios by giving tools access to the full browser context
• Maintains backward compatibility as all existing functionality is preserved through stagehand.page
• Improves the overall architecture by providing tools with more complete browser automation capabilities

Confidence score: 4/5

• This PR is safe to merge with minimal risk
• The refactoring is straightforward and maintains backward compatibility by accessing page functionality through stagehand.page. All tools continue to work the same way, just with access to more capabilities. The changes are consistent across all affected files and follow a clear pattern.
• No files require special attention

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