Introduce executeJSCode Function for Filesystem MCP Server without the need to have external files in context window

[freiit]

New function executeJSCode that lets run JavaScript against files/directories in the MCP server, not only with the analysis tool. Files are not automatically loaded into the context window to enable the handling of large files.

Key details

• JS execution with lodash, mathjs, PapaParse, XLSX libraries
• Robust error handling for sync/async code
• Proper Node.js environment with fs, path access
• No context pollution: large files won't bloat context, must be explicitly read

The function expands MCP capabilities for complex file analysis and data processing.

[alfonsograziano]

Ho @freiit, I see that you're experimenting with Node and MCP as well :D

In case you think it might be helpful, I built this Node.js MCP server which leverages Docker containers and custom images: https://github.com/alfonsograziano/node-code-sandbox-mcp

[olaservo]

Hi, thanks for the PR and apologies for not reviewing this sooner. Looking at these changes, I think we will hold on merging this into the filesystem server at this time, since we're focusing more on stability/security at the moment and making sure the core MCP features work reliably.