[bug] filterByFilepaths in a search query not working in copilot, the search returns no results

[kislam-eps]

Describe the bug

When I include filterByFilepaths in a search query, the search returns no results. Removing filterByFilepaths from the same query returns results as expected. The equivalent file: filter in the Sourcebot search UI works correctly.

I also tried using regex-style patterns instead of glob patterns — same issue, no results.

Expected behavior: filterByFilepaths should filter results by filepath, consistent with the file: filter in the search UI.

Actual behavior: Any value in filterByFilepaths causes the query to return zero results. We have .frm files and none of the following works:

query: "sPayPeriodMsg", filterByFilepaths: [".frm"], ref: "dev"
query: "sPayPeriodMsg", filterByFilepaths: ["**/.frm"], ref: "dev"
query: "sPayPeriodMsg", filterByFilepaths: [".*\.frm$"], ref: "dev"
When the filterByFilepaths is removed it returns a hit.

To reproduce

Use copilot to query through mcp.

Any value in filterByFilepaths causes the query to return zero results. We have .frm files and none of the following works:

query: "sPayPeriodMsg", filterByFilepaths: [".frm"], ref: "dev"
query: "sPayPeriodMsg", filterByFilepaths: ["**/.frm"], ref: "dev"
query: "sPayPeriodMsg", filterByFilepaths: [".*\.frm$"], ref: "dev"
When the filterByFilepaths is removed it returns a hit.

Sourcebot deployment information

Sourcebot version (e.g. v3.0.1): v4.11.6

Additional information

No response