Feature Request: Support .mcp.json in repo root

[SaqibS]

Describe the feature or problem you'd like to solve

It is useful to have a repo-specific MCP config so that a team can all use the same MCP servers, without each engineer needing to maintain their own config. Today this is supported via a checked-in .github/mcp.json file. But if different engineers are using different coding agents we need to maintain this in different folders. I propose additionally checking a file in the repo root.

Proposed solution

In addition to looking in .github/mcp.json also look in .mcp.json in the repo root, which is already used by Claude. I believe the file format is functionally the same, so it's just a case of looking in the different location. This is analagous to supporting agents.md in addition to Copilot-specific instructions.

Example prompts or workflows

N/A

Additional context

N/A

[examon]

Copilot CLI already supports loading .mcp.json from the workspace root in addition to .github/mcp.json, including the Claude-style root-level server format, so a single shared config can be used across both tools. If you're still seeing a problem, please comment with details and we'll take another look.