Sharepoint 2013 publishing page creation using Client Object Model

Use PublishingWeb.AddPublishingPage method to create a new PublishingPage object in the PublishingWeb from Microsoft.SharePoint.Client.Publishing namespace in SharePoint 2013 CSOM.

Example

public static PublishingPage CreatePublishingPage(ClientContext ctx, string pageName, string pageLayoutName)
{
    var pubWeb = PublishingWeb.GetPublishingWeb(ctx, ctx.Web);
    var pageInfo = new PublishingPageInformation
    {
        Name = pageName,
        PageLayoutListItem = GetPageLayoutByName(ctx, pageLayoutName)
    };
    var publishingPage = pubWeb.AddPublishingPage(pageInfo);
    ctx.ExecuteQuery();
    return publishingPage;
}



public static ListItem GetPageLayoutByName(ClientContext ctx, string name)
{
    var list = ctx.Site.GetCatalog((int)ListTemplateType.MasterPageCatalog);
    var qry = new CamlQuery
    {
        ViewXml = string.Format("<View><Query><Where><Eq><FieldRef Name='FileLeafRef' /><Value Type='Text'>{0}</Value></Eq></Where></Query></View>",name)
    };
    var result = list.GetItems(qry);
    ctx.Load(result);
    ctx.ExecuteQuery();
    var item = result.FirstOrDefault();
    return item;
}

Usage

using (var ctx = new ClientContext(webUri))
{
    var page = CreatePublishingPage(ctx, "Welcome.aspx", "BlankWebPartPage.aspx");
}

http://blogs.msdn.com/b/prasannabalajim/archive/2013/05/20/how-to-add-a-publishing-page-in-sharepoint-2013-using-client-object-model.aspx

This seems to be the answer, but I haven't tested it!