[BUG] Hints advertise `btw-side-question` feature, which doesn't seem to work and isn't documented

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I was using Claude Code, and I got a note that said "Start with 'btw' to ask a quick side question without interrupting Claude's current work".

When I tried using the feature, my prompts just did the same thing as ordinary messages, including queuing messages that I send while Claude is spinning on something. I don't know exactly how the feature is supposed to function, but I found it in the executable via strings:

[taylor@fedora-43 versions]$ strings /var/home/taylor/.local/lib/distrobox/fedora-43/.local/share/claude/versions/2.0.74 | grep -F btw
...
btw for side question
^btw\b\s*
^btw\b
btw-side-question
Start with 'btw' to ask a quick side question without interrupting Claude's current work
...

I have versions 2.0.67 and 2.0.73 installed too, and it shows up in 73 but not 67, so it seems to be a feature in progress that isn't finished perhaps? I can't find any documentation on it at all.

What Should Happen?

I expect it to do something specific, or to not advertise a feature that doesn't work and isn't documented.

Claude Model

Opus

Is this a regression?

No, this never worked

Claude Code Version

2.0.74

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

Other