Previously:

A List of Hacker News's Undocumented Features and Behaviors - https://news.ycombinator.com/item?id=42835806 - Jan 2025 (10 comments)

A list of Hacker News's undocumented features and behaviors - https://news.ycombinator.com/item?id=38773957 - Dec 2023 (283 comments)

Hidden Functions of Hacker News - https://news.ycombinator.com/item?id=38572756 - Dec 2023 (1 comment)

A List of Hacker News's Undocumented Features and Behaviors - https://news.ycombinator.com/item?id=33076053 - Oct 2022 (70 comments)

* A List of Hacker News's Undocumented Features and Behaviors* - https://news.ycombinator.com/item?id=30459276 - Feb 2022 (67 comments)

A List of Hacker News's Undocumented Features and Behaviors (2018-20) - https://news.ycombinator.com/item?id=26866482 - April 2021 (259 comments)

A List of Hacker News's Undocumented Features and Behaviors (2018) - https://news.ycombinator.com/item?id=23439437 - June 2020 (267 comments)

A List of Hacker News's Undocumented Features and Behaviors - https://news.ycombinator.com/item?id=20292361 - June 2019 (25 comments)

A List of Hacker News's Undocumented Features and Behaviors - https://news.ycombinator.com/item?id=19212822 - Feb 2019 (188 comments)

Hacker News's Undocumented Features and Behaviors - https://news.ycombinator.com/item?id=16437973 - Feb 2018 (395 comments)

> After a post or comment is made, it can be edited by the author within 2 hours.

This doesn't apply to certain special posts, such as "Ask HN: Who wants to be hired?"

Comments are always editable there.

I was hoping this page would tell me how to italicize words. I still don't know how.

Like this : https://news.ycombinator.com/formatdoc

This is a really nice list! I didn't even know half of those links existed.

I've just been informed that my account is shadowbanned from voting and flagging. This is not a possible behaviour on the list, and should be added.

Best is to contact hn@ycombinator.com to get an explanation or a correction.

I did. That's how I know my account is shadow-restricted because I didn't flag equal numbers of posts from all political sides - they told me so.

Doesn't matter if some political sides generate a lot more flaggable posts - still have to flag equal numbers.

That's not what I said, and I think it's pretty dodgy to abuse email conversation in this way.

From hn@ycombinator.com:

> Yes, we turned off the flags from your account at some point. Most probably this is because they seemed politically motivated. Of course we can't know this for sure, but when accounts seem largely to be flagging for political reasons, we tend to make the flags not count. We do this, btw, regardless of the political position they seem to be coming from.