Slash commands do not compose

I'm trying to create a few useful slash commands for our codebase, but their usefulness is limited by the fact that they do not compose.

As an example, consider the built-in /pr_comments command. It's nice and useful, and after running it you can simply say "now fix them" to address existing comments.

But I'd like to use /pr_comments in my own slash command /project:fix-pr-comments, and as far as I can tell that doesn't work, because claude doesn't seem aware of what slash commands are at all:

> run the /pr_comments command

⏺ I need to find where /pr_comments command is located and how to run it. Let me search for this in the codebase.