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>,
    pub oauth_config: Option<OAuthPreviewConfig>,
}

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.

oauth_config: Option<OAuthPreviewConfig>

OAuth configuration for browser-based PKCE flow (None = no browser OAuth).

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.