Passed 19 of 22 test cases with the skill, and 17 of 22 without it.
Without skill77%
With skill86%
Checks it passed that the model alone missed
Recommends an aspect ratio of 4:3 or 5:4 for primary Etsy listing thumbnails
Advises keeping high-contrast background props out of the main search thumbnail
2 fixed17 passed either way3 still failing0 broke
Pass-rate lift
+9 pp
Tokens
+22%
Agent turns
0%
Response time
+4%
Model gemini-3.6-flashMeasured 8/19/2026v119 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 2 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 2
Prompt
I am preparing main listing photos for handmade ceramic mugs on Etsy. I plan to crop all my listing photos square at 1000x1000 pixels. What aspect ratio and minimum pixel dimensions should I use for optimal display across mobile and desktop search results?
What was checked, without and with the skill
Checked
Without skill
With skill
Recommends a minimum image dimension of 2000 pixels on the shortest side
Passed
Passed
Recommends an aspect ratio of 4:3 or 5:4 for primary Etsy listing thumbnails
Missed
Passed
case-01 · gemini-3.6-flash · 8/19/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.