Premium mobile UI skill for React Native and Expo apps. Enforces native-grade interaction patterns, platform-specific motion, gesture physics, and non-generic visual systems for iOS and Android.
SkillScore82Maintained
Automatic
◆Frontend / UI pack
Last verified 8/4/2026
What it changes
Passed 18 of 22 test cases with the skill, and 9 of 22 without it.
Without skill41%
With skill82%
Checks it passed that the model alone missed
Sets snappy spring mass to 0.5
Sets snappy spring damping to 20
Specifies Sora font family for iOS
and 11 more in the full report
9 fixed9 passed either way4 still failing0 broke
Pass-rate lift
+41 pp
Tokens
+21%
Agent turns
0%
Response time
-14%
Model gemini-3.6-flashMeasured 8/4/2026v118 of 22 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 9 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 9
Prompt
We are setting up mobile typography design tokens for headlines and body text. What exact point sizes and font weights should be used for Headline and Body text levels?
What was checked, without and with the skill
Checked
Without skill
With skill
Sets Headline font size to 17pt with 600 weight
Missed
Passed
Sets Body font size to 17pt with 400 weight
Missed
Passed
case-09 · gemini-3.6-flash · 8/4/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md98 linessingle file
FORGE MOBILE — Native-Grade Mobile Design Skill
Designing for a human holding glass with their thumbs.
Every decision — padding, font, tap target, animation — must honor that physical reality.