I seemed to have gotten a submit error when I tried to post these a couple of hours ago. Here’s my attempt to answer your questions. Thanks to Raemon for also answering.
Is there a way to add wiki-links like on the old wiki? I tried using the [[double square brackets]] like on MediaWiki, but this did not work (at least on the new editor).
Not currently. I expect we’ll implement a new autocomplete/auto-link on existing pages relatively soon, but this won’t automatically create new pages if they don’t exist.
Is there a way to quickly see if a wiki-tag page on a topic already exists? On the creation page, typing something in the box does not show existing pages with that substring. What I’m doing right now is to look on the all tags page (searching with my browser) and also looking at the wiki 1.0 imported pages list and again searching there. I feel like there must be a better way than this, but I couldn’t figure it out.
The best way would be with LessWrong’s overall search bar (top right of the page). That has a Wiki & Tags section that’ll cover all pages. Sorry for not having search clearer or better (I plan to put a prominent search bar on the Concept page), it’s a significant shortcoming right now.
Is there a way to add MediaWiki-like <ref> tags? Or is there some preferred alternative way to add references on wiki-tag pages?
Unfortunately not currently but we get a lot of questions about footnotes and references, so I’m personally voting on the team that we actually implement something good here.Thanks for asking, sorry we haven’t got all the things fleshed out yet, but thanks for your interest!