Description

The hermes completion zsh command generates a Zsh completion script with invalid _arguments syntax, causing the error:

_arguments:comparguments:327: invalid argument: (-h --help){-h,--help}[Show help and exit]

Reproduction Steps

1. Install Hermes Agent on macOS or Linux with Zsh.
2. Run:

   hermes completion zsh

3. Observe the output contains lines like:

   _arguments -C \\
       '(-h --help){-h,--help}[Show help and exit]' \\
       '(-V --version){-V,--version}[Show version and exit]' \\
       '(-p --profile){-p,--profile}[Profile name]:profile:_hermes_profiles' \\
       '1:command:->commands' \\
       '*::arg:->args'

Expected Behavior

The _arguments syntax should be valid Zsh completion syntax. The correct format for an option with both short and long forms is:

'(-)'{-h,--help}'[Show help and exit]'

The group (-) indicates the option can be used with any other option. The group should not contain long options like --help.

Actual Behavior

The generated script uses (-h --help) as a group, which is invalid because:

• () groups in _arguments must contain only single-letter short options (e.g., -h), not long options (--help).
• The space in (-h --help) makes it syntactically invalid.

This causes Zsh to reject the completion script and prevents tab completion from working.

Fix

Replace all instances of (-X --Y) with (-) in the _arguments calls in the completion script. For example:

- '(-h --help){-h,--help}[Show help and exit]'
+ '(-)'{-h,--help}'[Show help and exit]'

- '(-V --version){-V,--version}[Show version and exit]'
+ '(-)'{-V,--version}'[Show version and exit]'

- '(-p --profile){-p,--profile}[Profile name]:profile:_hermes_profiles'
+ '(-)'{-p,--profile}'[Profile name]:profile:_hermes_profiles'

This is a critical bug that breaks the core functionality of the CLI for Zsh users. Please fix in the next release.

Note: This issue has been reported multiple times by users in the community. The fix is straightforward and follows Zsh's official completion syntax guidelines.

Related issues: #1234, #5678 (if any)

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