Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/pymodel/react-frontend-skills/shadcnnpx skills add PyModel/react-frontend-skills --skill shadcngit clone --depth 1 https://github.com/PyModel/react-frontend-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/pymodel/react-frontend-skills/shadcn)<a href="https://agentmods.dev/skills/pymodel/react-frontend-skills/shadcn"><img src="https://agentmods.dev/badge/skills/pymodel/react-frontend-skills/shadcn.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00063 | $0.01704 |
| Opus 5 | $0.00032 | $0.00852 |
| Sonnet 5 | $0.00013 | $0.00341 |
| Haiku 4.5 | $0.00006 | $0.00170 |
Grade A, and why
shadcn scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
shadcn/ui Community Best Practices
Current best-practices guide for shadcn/ui applications. Before applying primitive-specific guidance, inspect whether the checked-in components use Radix UI or Base UI; current shadcn supports both and their composition APIs differ.
When to Apply
Reference these guidelines when:
- Writing new shadcn/ui components or composing primitives
- Implementing forms with React Hook Form and Zod validation
- Building data tables or handling large dataset displays
- Customizing themes or adding dark mode support
- Reviewing code for accessibility compliance
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Component Architecture | CRITICAL | arch- |
| 2 | Accessibility Preservation | CRITICAL | ally- |
| 3 | Styling & Theming | HIGH | style- |
| 4 | Form Patterns | HIGH | form- |
| 5 | Data Display | MEDIUM-HIGH | data- |
| 6 | Component Composition | MEDIUM | comp- |
| 7 | Performance Optimization | MEDIUM | perf- |
| 8 | State Management | LOW-MEDIUM | state- |
Quick Reference
1. Component Architecture (CRITICAL)
arch-use-asChild-for-custom-triggers- Use the generated primitive's composition APIarch-preserve-radix-primitive-structure- Maintain Radix compound component hierarchyarch-extend-variants-with-cva- Use Class Variance Authority for type-safe variantsarch-use-cn-for-class-merging- Use cn() utility for safe Tailwind class mergingarch-forward-refs-for-composable-components- Forward refs for form and focus integrationarch-isolate-component-variants- Separate base styles from variant-specific styles
What ships with it
43 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- AGENTS.md 8.1 KB
- references/ally-ensure-color-contrast.md 1.7 KB
- references/ally-maintain-focus-management.md 2.0 KB
- references/ally-preserve-aria-attributes.md 2.2 KB
- references/ally-preserve-keyboard-navigation.md 2.0 KB
- references/ally-provide-sr-only-labels.md 1.8 KB
- references/arch-extend-variants-with-cva.md 1.9 KB
- references/arch-forward-refs-for-composable-components.md 2.3 KB
- references/arch-isolate-component-variants.md 2.2 KB
- references/arch-preserve-radix-primitive-structure.md 1.6 KB
- references/arch-use-asChild-for-custom-triggers.md 1.5 KB
- references/arch-use-cn-for-class-merging.md 1.7 KB
- references/comp-combine-command-with-popover.md 3.1 KB
- references/comp-compose-with-compound-components.md 3.0 KB
- references/comp-create-reusable-form-fields.md 3.8 KB
- references/comp-nest-dialogs-correctly.md 3.1 KB
- references/comp-use-drawer-for-mobile-modals.md 3.3 KB
- references/comp-use-slot-pattern-for-flexibility.md 3.2 KB
- references/data-empty-states-with-guidance.md 2.9 KB
- references/data-paginate-server-side.md 3.1 KB
- references/data-use-skeleton-loading-states.md 2.7 KB
- references/data-use-tanstack-table-for-complex-tables.md 3.1 KB
- references/data-virtualize-large-lists.md 2.4 KB
- references/form-handle-async-validation.md 2.7 KB
- references/form-reset-form-state-correctly.md 2.3 KB
- references/form-show-validation-errors-correctly.md 1.7 KB
- references/form-use-react-hook-form-integration.md 3.1 KB
- references/form-use-zod-for-schema-validation.md 2.6 KB
- references/perf-avoid-unnecessary-rerenders-in-forms.md 2.6 KB
- references/perf-debounce-search-inputs.md 2.4 KB
- references/perf-lazy-load-heavy-components.md 2.5 KB
- references/perf-memoize-expensive-renders.md 2.4 KB
- references/perf-optimize-icon-imports.md 1.9 KB
- references/state-colocate-state-with-components.md 2.8 KB
- references/state-lift-state-to-appropriate-level.md 2.6 KB
- references/state-prefer-uncontrolled-for-simple-inputs.md 2.5 KB
- references/state-use-controlled-dialog-state.md 3.3 KB
- references/style-avoid-important-overrides.md 1.8 KB
- references/style-consistent-spacing-scale.md 1.9 KB
- references/style-dark-mode-support.md 2.2 KB
- references/style-responsive-design-patterns.md 2.5 KB
- references/style-use-css-variables-for-theming.md 1.7 KB
- references/style-use-tailwind-theme-extend.md 1.9 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 4d ago First seen · 113 lines · 63 tokens per session scan A ce72dfa4a963
shadcn is a skill published in the GitHub repository PyModel/react-frontend-skills (3 stars, last pushed yesterday), licensed MIT. It adds 63 tokens to every session and 1,704 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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