Struct PreviewConfig 

pub struct PreviewConfig {
    pub mcp_url: String,
    pub port: u16,
    pub initial_tool: Option<String>,
    pub theme: String,
    pub locale: String,
    pub widgets_dir: Option<PathBuf>,
    pub mode: PreviewMode,
    pub auth_header: Option<String>,
}

Configuration for the preview server

Fields

mcp_url: String

URL of the target MCP server

port: u16

Port for the preview server

initial_tool: Option<String>

Initial tool to select

theme: String

Initial theme (light/dark)

locale: String

Initial locale

widgets_dir: Option<PathBuf>

Optional directory containing widget .html files for file-based authoring.

When set, the preview server reads widget HTML directly from disk on each request (hot-reload without file watchers). Widgets are discovered by scanning this directory for .html files and mapping each to a ui://app/{stem} resource URI.

mode: PreviewMode

Preview mode (standard or chatgpt)

auth_header: Option<String>

Optional Authorization header value for authenticated MCP servers.

When set, the proxy attaches this header to every outbound request to the target MCP server.

Trait Implementations

impl Clone for PreviewConfig

fn clone(&self) -> PreviewConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PreviewConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for PreviewConfig

fn default() -> Self

Returns the “default value” for a type.