Create MCP Config

Generate a project-local mcp.json that lists the MCP servers the project needs, in the shape documented in the mcp-json-spec reference.

Steps

1. Identify which capabilities the project needs (filesystem, git, DB, etc.).
2. For each capability, pick the appropriate MCP server package or transport.
3. Fill in command, args, and env (or url/headers for HTTP transports).
4. Reference secrets with ${VAR} placeholders rather than inlining them.
5. Validate the file with air validate mcp.json before committing it.