Visual Diff with Gemini

Compare two images using Gemini 3 Pro's visual understanding.

Invocation

Parse arguments: /visual-diff <reference-path> <actual-path>

Steps

1. Verify both paths exist (use ls or Read tool)
2. Run gemini comparison:

gemini --yolo --model gemini-3-pro-preview --output-format text \
  "Compare these two images. First is REFERENCE (expected), second is ACTUAL (rendered).