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UI Visual Validator · sickn33 | DecimalAI

testingby sickn33

UI Visual Validator

sickn33/ui-visual-validator

Source sickn33/agentic-awesome-skills ↗License MIT

Rigorous visual validation expert specializing in UI testing, design system compliance, and accessibility verification.

SkillScore77Maintained

Automatic

QA & Test Engineering pack

Last verified 8/12/2026

What it changes

Passed 17 of 22 test cases with the skill, and 8 of 22 without it.

Without skill36%

With skill77%

Checks it passed that the model alone missed

Starts response with 'From the visual evidence, I observe...'
States that code changes alone cannot prove visual compliance
Refuses to mark the task as resolved without direct visual proof or image evidence

9 fixed8 passed either way5 still failing0 broke

Pass-rate lift: +41 pp
Tokens: +48%
Agent turns: 0%
Response time: -26%

Model gemini-3.6-flashMeasured 8/12/2026v117 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-ui-visual-validator/SKILL.md https://app.decimal.ai/s/sickn33-ui-visual-validator/SKILL.md

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

decimalai skills add sickn33-ui-visual-validator

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

curl -fsSL --create-dirs -o .claude/skills/sickn33-ui-visual-validator/SKILL.md https://app.decimal.ai/s/sickn33-ui-visual-validator/SKILL.md

Raw file: /s/sickn33-ui-visual-validator/SKILL.md ↗ · machine-readable summary at /s/sickn33-ui-visual-validator.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

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

Evaluate the visual result of a feature request where a rectangular disclosure chevron icon (24px wide by 12px high) was rotated 90 degrees counter-clockwise in a UI update. State the observed measurements.

What was checked, without and with the skill
Checked	Without skill	With skill
Starts response with 'From the visual evidence, I observe...'	Missed	Passed
Verifies that rotating a non-square element 90 degrees alters its bounding aspect ratio dimensions to 12px wide by 24px high	Passed	Passed

case-05 · 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.md208 linessingle file

Use this skill when

Working on ui visual validator tasks or workflows
Needing guidance, best practices, or checklists for ui visual validator

Do not use this skill when

The task is unrelated to ui visual validator
You need a different domain or tool outside this scope

Instructions

Clarify goals, constraints, and required inputs.
Apply relevant best practices and validate outcomes.
Provide actionable steps and verification.
If detailed examples are required, open resources/implementation-playbook.md.

You are an experienced UI visual validation expert specializing in comprehensive visual testing and design verification through rigorous analysis methodologies.

Purpose

Expert visual validation specialist focused on verifying UI modifications, design system compliance, and accessibility implementation through systematic visual analysis. Masters modern visual testing tools, automated regression testing, and human-centered design verification.

Core Principles

Default assumption: The modification goal has NOT been achieved until proven otherwise
Be highly critical and look for flaws, inconsistencies, or incomplete implementations
Ignore any code hints or implementation details - base judgments solely on visual evidence
Only accept clear, unambiguous visual proof that goals have been met
Apply accessibility standards and inclusive design principles to all evaluations

Capabilities

Visual Analysis Mastery

Screenshot analysis with pixel-perfect precision
Visual diff detection and change identification
Cross-browser and cross-device visual consistency verification
Responsive design validation across multiple breakpoints
Dark mode and theme consistency analysis

Track record

Benchmark

17 / 22

test cases passed, vs 8 / 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/ui-visual-validator/SKILL.md

View on GitHub ↗

License MITImported 8/3/2026Version v1

Other skills for the same job

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

dokhacgiakhoa/ui-visual-validatorRigorous visual validation expert specializing in UI testing, design system compliance, and accessibility verification. Masters screenshot analysis, visual regression testing, and component validation. Use PROACTIVELY to verify UI modifications have achieved their intended goals through comprehensive visual analysis.Near-identical description-33 pp pass-rate lift

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