[BUG] Trailing whitespaces dismiss plug-in command arguments

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?

When using a plug-in command with arguments, the arguments are dismissed if there is a final space. For instance:

<img width="1421" height="117" alt="Image" src="https://github.com/user-attachments/assets/dfaddabd-b2b5-42f1-926d-362c968bc06d" />

It contains a final space, and Claude seems to understand it as if there were no provided arguments:

• It provides the task description in blue,
• The history (up arrow) only contains the command without the argument,
• The output mentions there is no passed argument:

> /claude-tint-config:ticket is running…

● I notice the /ticket command was called but no ticket number was provided in $ARGUMENTS. Could you please specify which Linear ticket you'd like me to work on?

What Should Happen?

I would expect the command to take the argument PLA-123 , and not dismiss it.

Error Messages/Logs

Steps to Reproduce

1. Install the commit-commands Claude plugin (using the /plugin command)
2. Prompt /commit-commands:commit-push-pr 123 (with a final space)
3. The task description is written, which is not the case when there is an argument (or no final space)

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.45

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

WSL (Windows Subsystem for Linux)

Additional Information

_No response_