[GRO-237] change user metadata in session create to strings

[Kylejeong2]

what

change user metadata in session create to strings, bug fix

[greptile-apps]

Greptile Summary

This PR addresses a bug in the Browserbase session creation process by converting a boolean metadata value to a string. Specifically, the change modifies the userMetadata field in src/stagehandStore.ts where the mcp property is changed from the boolean true to the string "true".

This change is necessary because Browserbase's session metadata API has specific limitations - it only supports string values for querying and comparison operations. According to Browserbase's documentation, the API "only supports querying by fields (no arrays) and checking value equality of strings (no numbers or booleans)." The recommended approach is to "convert numbers and booleans into strings and query normally."

The MCP server likely needs to query sessions by the mcp metadata field to identify which sessions were created by the MCP server versus other sources. This metadata filtering capability is essential for proper session management within the broader Browserbase ecosystem. By ensuring the metadata value is a string, the server can successfully filter and identify MCP-created sessions through Browserbase's API.

Confidence score: 5/5

• This is a straightforward bug fix that addresses a clear API compatibility issue with minimal risk.
• The change is well-documented in the context and aligns with Browserbase's documented API requirements for metadata querying.
• No files need additional attention - the change is isolated and addresses the root cause directly.

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