Use this skill when the task involves resizing, scaling, or compressing image files. Suitable for tasks like "resize these photos to 800px wide", "compress images to reduce file size", or "batch scale all JPEGs in a folder". Only relevant for image processing tasks — do NOT use for data files, text, or non-image tasks.
SkillScore82Maintained
Automatic
◆Coding pack
Last verified 9/27/2026
What it changes
Passed 15 of 18 test cases with the skill, and 3 of 18 without it.
Without skill18%
With skill82%
Checks it passed that the model alone missed
Passes --width 64
Passes --width 500
Passes --width 900
and 33 more in the full report
14 fixed4 passed either way4 still failing0 broke
Pass-rate lift
+64 pp
Tokens
-60%
Agent turns
0%
Response time
-53%
Model gemini-3.6-flashMeasured 9/27/2026v118 of 22 cases passed with skill · 18 comparable
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 14 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 14
Prompt
I need to batch resize images in `./raw_thumbnails` to exactly 200px width and 150px height, saving them to `./processed_thumbnails`. Give me the exact terminal command to execute.
What was checked, without and with the skill
Checked
Without skill
With skill
Runs scripts/resize.py
Missed
Passed
Passes --width 200 argument
Missed
Passed
Passes --height 150 argument
Missed
Passed
case-05 · gemini-3.6-flash · 9/27/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md13 lines2 filesincludes scripts
Image Resize Skill
Batch resizes and compresses image files (JPEG, PNG, WebP).
Available Scripts
scripts/resize.py — Resize one or more images to a target width/height; preserves aspect ratio by default