A simple interface to automatically let users toggle columns in any data table on the entire wiki.
There's a number (haha) of ways to find namespace numbers; this is the one I find to be the easiest (plus some bonus options)
Instead of putting all of your code experiments on a single page, make lots of little sandbox pages!
A list of just the useful hotkeys/access keys in MediaWiki
This one trick will save you 80% of your wikitext debugging time!
Multi-instance subtemplates are common in MediaWiki; when we're using Lua, they can be much more powerful than in wikitext.
What's a bot password? What's the difference between bot accounts and bot passwords? Why do I need all this anyway?
Highlight Links In Category has a number of incredibly nice use cases; here I give some examples.
The pattern of store -> query -> store -> query can lead to caching nightmares when working with Cargo or SMW in MediaWiki. This is the story of how I dealt with one.
Here's how I've built a framework for both static and lazily-loaded popups.
Disambiguations are typically somewhat user-unfriendly; I describe my method for improving quality of life when disambiguation links do appear.
CharInsert is one of my favorite extensions. Here's how I made a Lua wrapper for it to create a user-friendly interface for anyone to add snippets they want.