It's fine to post links to your own work occasionally when they're relevant, but we don't allow single-purpose accounts on HN, and definitely not for promotion. At some point (sooner rather than later, in many HN readers' minds) it crosses into spamming.
You're welcome to participate in the community here, but the way to do that is to post/submit on a variety of intellectually interesting topics, including your own stuff occasionally.
Hooray - the inconvenience of local state with the inferior UX of a web app.
Please don't be a jerk on HN, especially in response to someone's work.
[0] https://dev.lotw.xyz/shell.os ("help" is your friend!)