Type Alias ThemeFrame

ThemeFrame: FrameBase<"theme"> & {
    css?: string | null;
    hostDevBuild?: boolean;
    name: ThemeName;
    themeId?: string;
}

Optionalcss?: string | null
OptionalhostDevBuild?: boolean

True when the HOST is an unpackaged dev build (!app.isPackaged) — the host-build flavor, NOT this project's §3.18 effective bundle mode. Rides the theme frame because that is the hello-reply bootstrap seam. Omitted by an older host; consumers treat absence as "unknown", not false.
name: ThemeName
OptionalthemeId?: string