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shadcn/ui · sickn33 | DecimalAI

frontendby sickn33

shadcn/ui

sickn33/shadcn

Source sickn33/agentic-awesome-skills ↗License MIT

Manages shadcn/ui components and projects, providing context, documentation, and usage patterns for building modern design systems.

SkillScore92Maintained

Automatic

Frontend / UI pack

Last verified 8/11/2026

What it changes

Passed 22 of 24 test cases with the skill, and 5 of 24 without it.

Without skill21%

With skill92%

Checks it passed that the model alone missed

Includes a DialogTitle component inside DialogContent.
Includes an AvatarFallback sub-component inside Avatar.
Uses the Separator component instead of raw hr elements.

and 20 more in the full report

17 fixed5 passed either way2 still failing0 broke

Pass-rate lift: +71 pp
Tokens: +122%
Agent turns: 0%
Response time: -39%

Model gemini-3.6-flashMeasured 8/11/2026v122 of 24 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-shadcn/SKILL.md https://app.decimal.ai/s/sickn33-shadcn/SKILL.md

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

decimalai skills add sickn33-shadcn

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

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

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

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 17 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 17

Prompt

I want to initialize a new project using the preset code `a2r6bw`. What terminal command should I execute?

What was checked, without and with the skill
Checked	Without skill	With skill
Passes the preset code directly to npx shadcn@latest init using the --preset flag.	Missed	Passed

case-14 · gemini-3.6-flash · 8/11/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md245 lines3 files

shadcn/ui

A framework for building ui, components and design systems. Components are added as source code to the user's project via the CLI.

IMPORTANT: Run all CLI commands using the project's package runner: npx shadcn@latest, pnpm dlx shadcn@latest, or bunx --bun shadcn@latest — based on the project's packageManager. Examples below use npx shadcn@latest but substitute the correct runner for the project.

When to Use

Use when adding new components from shadcn/ui or community registries.
Use when styling, composing, or debugging existing shadcn/ui components.
Use when initializing a new project or switching design system presets.
Use to retrieve component documentation, examples, and API references.

Current Project Context

!`npx shadcn@latest info --json 2>/dev/null || echo '{"error": "No shadcn project found. Run shadcn init first."}'`

The JSON above contains the project config and installed components. Use npx shadcn@latest docs <component> to get documentation and example URLs for any component.

Principles

Use existing components first. Use npx shadcn@latest search to check registries before writing custom UI. Check community registries too.
Compose, don't reinvent. Settings page = Tabs + Card + form controls. Dashboard = Sidebar + Card + Chart + Table.
Use built-in variants before custom styles. variant="outline", size="sm", etc.
Use semantic colors. bg-primary, text-muted-foreground — never raw values like bg-blue-500.

Critical Rules

These rules are always enforced. Each links to a file with Incorrect/Correct code pairs.

Styling & Tailwind → styling.md

className for layout, not styling. Never override component colors or typography.
No space-x-* or space-y-*. Use flex with gap-*. For vertical stacks, flex flex-col gap-*.
Use size-* when width and height are equal. size-10 not w-10 h-10.
Use truncate shorthand. Not overflow-hidden text-ellipsis whitespace-nowrap.
No manual dark: color overrides. Use semantic tokens (bg-background, text-muted-foreground).
Use cn() for conditional classes. Don't write manual template literal ternaries.
No manual z-index on overlay components. Dialog, Sheet, Popover, etc. handle their own stacking.

Track record

Benchmark

22 / 24

test cases passed, vs 5 / 24 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/shadcn/SKILL.md

View on GitHub ↗

License MITImported 8/10/2026Version v1Bundled 2 files

Other skills for the same job

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

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

Ready to supercharge your AI agents?

See it in action

What's inside

shadcn/ui

When to Use

Current Project Context

Principles

Critical Rules

Styling & Tailwind → styling.md

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills