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CORE DIRECTIVE: PREMIUM MOBILE APP IMAGE DIRECTION · nexu-io | DecimalAI

design mediaby nexu-io

CORE DIRECTIVE: PREMIUM MOBILE APP IMAGE DIRECTION

nexu-io/imagegen-frontend-mobile

Source nexu-io/open-design ↗License Apache-2.0

Elite mobile app image-generation skill for creating premium, app-native screen concepts and flows. Designed for iOS, Android, and cross-platform mobile products. Prioritizes clean hierarchy, comfortably readable text, strong multi-screen consistency, controlled color palettes, non-generic creative direction, textured surfaces, image-led composition, tasteful custom iconography, and clean phone mockup framing. By default, screens should be shown inside a subtle premium iPhone or similar phone mo

SkillScore84Maintained

Automatic

Design & UX Review pack

Last verified 8/28/2026

What it changes

Passed 21 of 25 test cases with the skill, and 11 of 25 without it.

Without skill44%

With skill84%

Checks it passed that the model alone missed

The assistant refrains from writing HTML or CSS code.
The response avoids purpose-less glassmorphism cards.
The response refrains from outputting HTML or CSS code.

and 16 more in the full report

11 fixed10 passed either way3 still failing1 broke

Pass-rate lift: +40 pp
Tokens: +185%
Agent turns: 0%
Response time: -23%

Model gemini-3.6-flashMeasured 8/28/2026v121 of 25 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/nexu-io-imagegen-frontend-mobile/SKILL.md https://app.decimal.ai/s/nexu-io-imagegen-frontend-mobile/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add nexu-io-imagegen-frontend-mobile, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/nexu-io-imagegen-frontend-mobile/ and pins it in .decimal/skills.lock

decimalai skills add nexu-io-imagegen-frontend-mobile

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/nexu-io-imagegen-frontend-mobile/SKILL.md https://app.decimal.ai/s/nexu-io-imagegen-frontend-mobile/SKILL.md

Raw file: /s/nexu-io-imagegen-frontend-mobile/SKILL.md ↗ · machine-readable summary at /s/nexu-io-imagegen-frontend-mobile.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

I need you to write React Native code and generate web landing page component layouts for our desktop financial analytics dashboard. Can you produce the React Native JSX for the navigation bar and hero banner?

What was checked, without and with the skill
Checked	Without skill	With skill
The assistant states that desktop web dashboard design and React Native code writing fall outside the mobile screen image direction scope.	Missed	Passed
The assistant refrains from writing React Native source code.	Missed	Passed

case-04 · gemini-3.6-flash · 8/28/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md1460 linessingle file

CORE DIRECTIVE: PREMIUM MOBILE APP IMAGE DIRECTION

You are an elite mobile product design art director.

Your job is not to generate generic app mockups. Your job is to generate premium, app-native, highly readable mobile app screen images and flow images.

This skill is for:

onboarding flows
auth flows
home dashboards
profile screens
settings screens
chat screens
ecommerce screens
fintech screens
health and fitness screens
productivity apps
social apps
utilities
multi-screen app concepts
premium mobile redesigns

This skill is not for:

websites
landing pages
desktop dashboards
image-to-code
frontend implementation
code generation

The output must feel:

app-native
premium
clean
highly intentional
visually strong
readable
believable
flow-aware
platform-aware

Track record

Benchmark

21 / 25

test cases passed, vs 11 / 25 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v4 — 8/8/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

nexu-io / open-design

skills/imagegen-frontend-mobile/SKILL.md

View on GitHub ↗

License Apache-2.0Imported 8/8/2026Version v1

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

imagegen-frontend-mobileElite mobile app image-generation skill for creating premium, app-native screen concepts and flows. Designed for iOS, Android, and cross-platform mobile products. Prioritizes clean hierarchy, comfortably readable text, strong multi-screen consistency, controlled color palettes, non-generic creative direction, textured surfaces, image-led composition, tasteful custom iconography, and clean phone mockup framing. By default, screens should be shown inside a subtle premium iPhone or similar phone moNear-identical description+18 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

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See it in action

What's inside

CORE DIRECTIVE: PREMIUM MOBILE APP IMAGE DIRECTION

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

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