Image helpers

resize-images.sh wraps the built-in macOS sips command so screenshots can be downscaled in-place before committing them to the blog. When pngquant is installed (via brew install pngquant), the script also auto-optimizes resized PNGs for smaller file sizes.

Usage:

scripts/resize-images.sh [max_width_px] <image>...

Example (resize a couple of screenshots to 1400px wide):

scripts/resize-images.sh 1400 images/blog/tc1.png images/blog/tc2.png

Images that are already narrower than the requested width are skipped.