how to make custom templates in Koken

I'm using Koken and would like to customize the template for text entries by putting the date at the top of the entry.

I hacked a call to new Date() into the core template file /admin/templates/text.tmpl.html

<div id="entry-editor">
    <div id="edit-area" data-bind="html: content() || 
        '<p class=\'date\'>' + new Date() + '</p>
         <p class=\'media-row\'><br /></p>'">
    </div>
</div> <!-- close #entry-editor -->

This works fine, but I know the perils of hacking core files.

As of this writing, I don't see an answer on the page linked as "define your own custom template types" on help.koken.me.

Without hacking core files, how can I have Koken add a date to the top of each text entry?

Solution

From http://help.koken.me/customer/portal/questions/1080677-how-to-make-custom-templates-in-koken-

Simply place a <koken:time> tag in the customized theme template.

For example, in my /storage/themes/<custom-theme-name>/essay.lens file:

<header>
    <h2>
        <koken:link>{{ essay.title }}</koken:link>
    </h2>
    <p>
        <strong><koken:time show="time" /> <koken:time show="date" /></strong>
    </p>
</header>