NB, searching for comments by dang (or other HN mods: sctb, as of a few weeks ago tomhow), and "self promotion" should help flesh out guidelines.

Some is OK. Mostly is not.

You'll get dinged by flags, or automatically through software, eventually.

<https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...>

Software: <https://news.ycombinator.com/item?id=38779156>

I post my own stuff occasionally, sometimes it even gets put into the 2nd chance pool ("pool" here: <https://news.ycombinator.com/lists>), without my asking. But I don't abuse the privilege.