In reply to Billy Wilcosky.

Billy, Thanks! Updates are always welcome, and the idea behind this is fantastic.

I just installed it on an updated site with WP 5.6. Unfortunately the interface doesn't appear as expected, and I get the following error:
Warning: Use of undefined constant posthasteForm - assumed 'posthasteForm' (this will throw an Error in a future version of PHP) in /homepages/htdocs/wp-content/plugins/narwhal-microblog/narwhal-microblog.php on line 262

Simple and beautiful UI for posting to WordPress seems to be the holy grail and this is about as useful a method as I've seen. Your interface reminds me a lot of some Micropub clients or the posting interface for Micro.blog. With Micro.blog, I really appreciate things like writing a note/aside and then when reaching some pre-arranged character limit like 280 characters, it automatically adds the title field if one wants to (optionally) add a title and switch it from being an aside into an article.

I notice that in your post about the update you mention character counters. If you're looking for something you could integrate or co-opt for future updates, I might recommend Peter Molnar's lightweight Character Count for Post Content & Excerpt which still works well despite its age.

I'll also ping a group of friends who I know would love this. Thanks again for your tool and all your work. This is awesome!