[TypeSpec Authiring] [Benchmark] Vally 0.6.0 need skill dir on command parameters

without parameter: all failed trigger
[eval-results.md](https://github.com/user-attachments/files/29690596/eval-results.md)
with parameter: success trigger
[eval-results.md](https://github.com/user-attachments/files/29690603/eval-results.md)

Start by comparing the attached eval-results.md files for Vally 0.6.0 runs with and without the command parameter, then locate the benchmark entry point that handles those parameters. Reproduce both cases and define completion as the no-parameter run correctly finding the required skill directory instead of failing all triggers.

Written by the indexing model from the issue text.