Using Slack with irssi

I've been using irssi to chat over IRC for a while, so when we started using Slack at work I was delighted with their IRC gateway.

To add a connection and make it persistent is simple enough:

/network add -nick <nickname> slack
/server add -auto -ssl -network slack <account> 6667 <password>

With others using the Slack app, I was getting a constant stream of mode-change notifications as their status changed from away to active and vice-versa. To stop that from happening, as it turned out, is easy:

/ignore -network slack * MODES