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UX/UI Principles · sickn33 | DecimalAI

design mediaby sickn33

UX/UI Principles

sickn33/uxui-principles

Source sickn33/agentic-awesome-skills ↗License MIT

Evaluate interfaces against 168 research-backed UX/UI principles, detect antipatterns, and inject UX context into AI coding sessions.

SkillScore91Maintained

Automatic

Design & UX Review pack

Last verified 8/12/2026

What it changes

Passed 20 of 22 test cases with the skill, and 18 of 22 without it.

Without skill82%

With skill91%

Checks it passed that the model alone missed

Suggests evaluating static interface descriptions or component markup instead.
Advises incorporating input debouncing to prevent UI performance degradation during live search.

2 fixed18 passed either way2 still failing0 broke

Pass-rate lift: +9 pp
Tokens: +4%
Agent turns: 0%
Response time: -18%

Model gemini-3.6-flashMeasured 8/12/2026v120 of 22 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/sickn33-uxui-principles/SKILL.md https://app.decimal.ai/s/sickn33-uxui-principles/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add sickn33-uxui-principles, 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/sickn33-uxui-principles/ and pins it in .decimal/skills.lock

decimalai skills add sickn33-uxui-principles

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

curl -fsSL --create-dirs -o .claude/skills/sickn33-uxui-principles/SKILL.md https://app.decimal.ai/s/sickn33-uxui-principles/SKILL.md

Raw file: /s/sickn33-uxui-principles/SKILL.md ↗ · machine-readable summary at /s/sickn33-uxui-principles.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

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

Please run an automated Playwright accessibility test suite against our staging site at https://staging.example.com to capture live DOM contrast ratios and keyboard trap bugs.

What was checked, without and with the skill
Checked	Without skill	With skill
Explains that executing live automated browser test scripts is outside its capability.	Passed	Passed
Suggests evaluating static interface descriptions or component markup instead.	Missed	Passed

case-02 · gemini-3.6-flash · 8/12/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md40 linessingle file

UX/UI Principles

A collection of 5 agent skills for evaluating interfaces against 168 research-backed UX/UI principles, detecting antipatterns, and injecting UX context into AI-assisted design and coding sessions.

Source: https://github.com/uxuiprinciples/agent-skills

Skills

Skill	Purpose
`uxui-evaluator`	Evaluate interface descriptions against 168 research-backed principles
`interface-auditor`	Detect UX antipatterns using the uxuiprinciples smell taxonomy
`ai-interface-reviewer`	Audit AI-powered interfaces against 44 AI-era UX principles
`flow-checker`	Check user flows against decision, error, and feedback principles
`vibe-coding-advisor`	Inject UX context into vibe coding sessions before implementation

When to Use

Auditing an existing interface for UX issues
Checking if a UI follows research-backed best practices
Detecting antipatterns and UX smells in designs
Reviewing AI-powered interfaces for trust, transparency, and safety
Getting UX guidance before or during implementation

How It Works

Install any skill from the collection
Describe the interface, screen, or flow you want to evaluate
The skill evaluates against the relevant principles and returns structured findings with severity levels and remediation steps
Optionally connect to the uxuiprinciples.com API for enriched output with full citations

Install

npx skills add uxuiprinciples/agent-skills

Limitations

Use this skill only when the task clearly matches the scope described above.
Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.

Track record

Benchmark

20 / 22

test cases passed, vs 18 / 22 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 — 8/3/2026

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

sickn33 / agentic-awesome-skills

skills/uxui-principles/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

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

UX/UI Principles

Skills

When to Use

How It Works

Install

Limitations

Track record

Benchmark

Adoption

SkillSafety

Source

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