Empower doesn't allow you to import legacy data from other sources (like Mint) or input manual transactions such as cash. The latter isn't important to me, but the former certainly is. I have 16 years of transaction data in Mint that I want to preserve.

The rule is written @forward "<url>". It loads the module at the given URL just like @use, but it makes the public members of the loaded module available to users of your module as though they were defined directly in your module. Those members aren’t available in your module, though—if you want that, you’ll need to write a @use rule as well.

Maybe of interest for some readers here: With your plugin, it's also straightforward to import the "tweets.csv" file from the official Twitter archive, which contains all the tweets (and a lot of metadata) from one's personal account. Still don't know what to do with this in TiddlyWiki, but there is certainly potential...