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/fellipeutaka/leon/baseline-uinpx skills add fellipeutaka/leon --skill baseline-uigit clone --depth 1 https://github.com/fellipeutaka/leonWrote 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/fellipeutaka/leon/baseline-ui)<a href="https://agentmods.dev/skills/fellipeutaka/leon/baseline-ui"><img src="https://agentmods.dev/badge/skills/fellipeutaka/leon/baseline-ui.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 5.1 | $0.00034 | $0.00762 |
| Opus 5 | $0.00017 | $0.00381 |
| Sonnet 5 | $0.00007 | $0.00152 |
| Haiku 4.5 | $0.00003 | $0.00076 |
Grade A, and why
baseline-ui 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 5d 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.
This is a copy
100% identical to baseline-ui — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Baseline UI
Enforces an opinionated UI baseline to prevent AI-generated interface slop.
How to use
-
/baseline-uiApply these constraints to any UI work in this conversation. -
/baseline-ui <file>Review the file against all constraints below and output:- violations (quote the exact line/snippet)
- why it matters (1 short sentence)
- a concrete fix (code-level suggestion)
Stack
- MUST use Tailwind CSS defaults unless custom values already exist or are explicitly requested
- MUST use
motion/react(formerlyframer-motion) when JavaScript animation is required - SHOULD use
tw-animate-cssfor entrance and micro-animations in Tailwind CSS - MUST use
cnutility (clsx+tailwind-merge) for class logic
Components
- MUST use accessible component primitives for anything with keyboard or focus behavior (
Base UI,React Aria,Radix) - MUST use the project’s existing component primitives first
- NEVER mix primitive systems within the same interaction surface
- SHOULD prefer
Base UIfor new primitives if compatible with the stack - MUST add an
aria-labelto icon-only buttons - NEVER rebuild keyboard or focus behavior by hand unless explicitly requested
Interaction
- MUST use an
AlertDialogfor destructive or irreversible actions - SHOULD use structural skeletons for loading states
- NEVER use
h-screen, useh-dvh - MUST respect
safe-area-insetfor fixed elements - MUST show errors next to where the action happens
- NEVER block paste in
inputortextareaelements
Animation
- NEVER add animation unless it is explicitly requested
- MUST animate only compositor props (
transform,opacity) - NEVER animate layout properties (
width,height,top,left,margin,padding) - SHOULD avoid animating paint properties (
background,color) except for small, local UI (text, icons) - SHOULD use
ease-outon entrance - NEVER exceed
200msfor interaction feedback - MUST pause looping animations when off-screen
- SHOULD respect
prefers-reduced-motion - NEVER introduce custom easing curves unless explicitly requested
- SHOULD avoid animating large images or full-screen surfaces
What ships with it
1 file 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.
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.
- 5d ago First seen · 86 lines · 34 tokens per session scan A fea3322f36d5
baseline-ui is a skill published in the GitHub repository fellipeutaka/leon (5 stars, last pushed 2d ago), licensed MIT. It adds 34 tokens to every session and 762 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 100% identical to baseline-ui, differing in 0 lines, and is treated as a copy.
Other skills, from other repositories
Shade ShadCN install
Guardrails for running pnpm dlx shadcn@latest add in Shade — never overwrite existing components, fresh branch first, swap raw colours for semantic tokens after integrating. Trigger when the user proposes a shadcn add, or when a fresh ShadCN-shaped file lands in apps/shade/src/components/ui.
chakra-ui-builder
Build responsive, accessible UI components and layouts using Chakra UI v3, install or configure Chakra UI in new and existing projects, and design scalable themes using tokens, semantic tokens, recipes, and slot recipes. Use this skill whenever a user asks to build, create, or generate any UI component, page, form…
frontend-visual-qa
Audits already-rendered web, landing-page, HTML deck/slide, browser tool/game, dashboard/admin, design-system, and desktop UIs using real-browser or native-app journeys, inspected screenshots, DOM geometry, responsive or projection viewports, and a bundled Playwright sweep. Use after UI implementation to find…
prototype-web
可点击的功能性 Web 原型, 含导航、英雄区、特性区、CTA.
waitlist-page
【模板: 等候名单页 / Waitlist】 【意图】为新产品 / 早鸟内测做一张极简等候页。 【布局】.
design-frontend-dev
Clean Impeccable frontend design skill. Use when the user wants to design, redesign, critique, audit, polish, harden, optimize, adapt, clarify, colorize, animate, or otherwise improve a frontend interface. Covers websites, landing pages, dashboards, product UI, app shells, components, forms, onboarding, empty states…