Hacker News Guidelines

IMO the guidelines could use some updates. For example, there are some unwritten conventions that could be formalized:

1) Search for duplicates before you submit a link.

2) If the submission is not from the current year, append (YEAR) at the end of the title.

3) It should be clarified that the guidelines about comments apply to linked article authors too. "Be kind. Don't be snarky." "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith." "Please don't post shallow dismissals, especially of other people's work."

4) There's dang's own idiosyncratic, controversial, unwritten exception to "Please submit the original source", i.e., unless it's a corporate PR.

[EDIT:] Three different replies have said to append [pdf] and [video] to submissions, but that's already in the guidelines. "If you submit a video or pdf, please warn us by appending [video] or [pdf] to the title."

AFAIK (I saw dang state this a few times in his comments) it is fine to submit duplicates to HN assuming enough time has passed (a year?). He'll even reach into the second change pool and re-submit submissions that did not gain much traction the first time around, I think. So I think your first rule isn't really something that is much enforced on HN. (Which I think is a good thing.)