This is amazing content marketing. Developers are an obvious target niche for such a product. Exposing internals of the software in a way HNers enjoy sounds like a great idea, would love to see if it worked as a traction experiment.
I would not say that developers are the target niche. The best customers are professional writers who use a ton of writing apps for different occasions.
Professional writer who uses different writing apps for different occasions is me exactly. I’m also the (or at least a) guy who messaged you about inline comments. As soon as all the details of that feature are implemented, I’m buying it.
