You talk, it writes the first draft
The blank page is the slowest part of any invitation. So you say it plainly: Jonas is turning forty, it is a supper with a bit of music, casual, at the back room above the Mill on the fourteenth. You can tell the AI this by messaging Jitabi on WhatsApp, opening Clara in the browser, or letting the in-app drafting prefill the sections as you set them up.
Out comes a draft: a headline, the date and place laid out, a short note about the tone of the night, and a reply line. Nothing about it is final. What you get is a usable first version you edit rather than a finished card you have to accept, and it stays a private draft until you decide to publish.