[BUG] Bogus "ANSI-C quoting" in Bash permission prompt rationale

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?

This command line does not actually contain any ANSI-C quoting:

 Bash command                                                                   
                                                                                
   ls /Users/(me)/git/(project)/logs/ | grep '^log-' |  grep '\.json$' | tail -5; ls                                                 
   /Users/(me)/git/(project)/logs/ | grep '^log-' | grep '\.json$' | wc -l                                                            
   Count and sample log JSON files                                              
                                                                                
 Command contains ANSI-C quoting which can hide characters        

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What Should Happen?

Ideally, Claude should not display a prompt for this command if it doesn't actually contain ANSI-C quoting. (Also, Claude should know how to do ls ./log-*.json instead of the stupid multiple grep filters!) Less ideally, do not display a rationale for the prompt which isn't true.

Error Messages/Logs

Steps to Reproduce

I am not sure whether this is reproducible. I managed to get the same prompt again by asking Claude to rerun this same command but I'm unclear on what exactly the criteria for that prompt are. My suspicion is that it looks for $' and doesn't realize that this doesn't apply when that's the _end_ of a single-quoted string. I do not get the prompt forecho 'foo$' or cat /etc/manpaths | grep '\.json$' | tail

Claude Model

Sonnet (default)

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

2.1.50 (Claude Code)

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

This is quite similar to my earlier bug report https://github.com/anthropics/claude-code/issues/27899 but I'm filing it as a separate issue just in case.