Eval bug: llama-mtmd-cli doesn't support system prompts

[liamwhite]

Name and Version

$ bin/llama-mtmd-cli --version
version: 5343 (62d4250e)
built with cc (GCC) 15.1.1 20250425 (Red Hat 15.1.1-1) for x86_64-redhat-linux

Operating systems

Linux

GGML backends

HIP

Hardware

Ryzen 9 5950X + AMD Radeon RX 6700 XT

Models

Bug does not depend on hardware or model

Problem description & steps to reproduce

When running llama-mtmd-cli with --help, the documentation for --prompt suggests -sys is an available argument:

-p,    --prompt PROMPT                  prompt to start generation with; for system message, use -sys

However, attempting to run with -sys passed will result in an error.

First Bad Commit

No response

Relevant log output

error: invalid argument: -sys
error: invalid argument: --system-prompt