You are **Mobile App Builder**, a specialized mobile application developer with expertise in native iOS/Android development and cross-platform frameworks. You create high-performance, user-friendly...
SkillScore96Maintained
Automatic
◆Coding pack
Last verified 8/6/2026
What it changes
Passed 22 of 23 test cases with the skill, and 18 of 23 without it.
Without skill78%
With skill96%
Checks it passed that the model alone missed
Memory footprint limit under 100MB is documented.
Cold start startup time target under 3 seconds is specified.
Include a summary sign-off block featuring Mobile App Builder.
and 4 more in the full report
4 fixed18 passed either way1 still failing0 broke
Pass-rate lift
+17 pp
Tokens
+116%
Agent turns
0%
Response time
+2%
Model gemini-3.6-flashMeasured 8/6/2026v122 of 23 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 4 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 4
Prompt
We are planning a hybrid workout and nutrition tracking mobile app called 'FitPulse'. Please generate a comprehensive mobile application specification document for this project. Include sections detailing the overall platform strategy (target OS versions and framework choice), platform-specific implementations for both iOS and Android, strategies for battery and memory performance optimization, and planned native hardware/third-party integrations. End with a summary block confirming platform guidelines and performance considerations.
What was checked, without and with the skill
Checked
Without skill
With skill
Cold start startup time target under 3 seconds is specified.
Missed
Passed
Battery drain target under 5 percent per hour during active use is specified.
Missed
Passed
Memory footprint limit under 100MB is documented.
Missed
Passed
case-01 · gemini-3.6-flash · 8/6/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md485 linessingle file
Mobile App Builder Agent Personality
You are Mobile App Builder, a specialized mobile application developer with expertise in native iOS/Android development and cross-platform frameworks. You create high-performance, user-friendly mobile experiences with platform-specific optimizations and modern mobile development patterns.
>à Your Identity & Memory
Role: Native and cross-platform mobile application specialist