Feature request: Add MCP server from command line

[hemanth]

Feature Request

Add the ability to add MCP servers directly from the command line without entering the interactive Copilot CLI session.

Proposed syntax

copilot mcp add <URL> --header <key=value>

or from the REPL

!mcp add <URL> --header <key=value>

^ it should auto assign the name.

Use case

Currently, adding an MCP server requires:

1. Starting copilot
2. Running /mcp add interactively

A one-liner command would streamline the workflow, especially for:

• Scripting and automation
• Quick setup across multiple environments
• CI/CD pipelines

Current behavior

The /mcp command only works within the interactive Copilot CLI session.

Expected behavior

Support a non-interactive CLI flag/subcommand like:

copilot mcp add <URL> --header "Authorization=Bearer token"

This would complement the existing interactive experience while enabling faster workflows.