Open Agents is an open-source reference application for running background coding agents through a web interface, durable workflows, isolated Vercel sandboxes, and GitHub integration. Developers fork and adapt it to let agents make code changes without keeping a local computer running. The catalogue entries provide skills, agents, and instructions for its workflow.
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 skills add vercel-labs/open-agents --skill baseline-uigit clone --depth 1 https://github.com/vercel-labs/open-agentsWrote 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/vercel-labs/open-agents/baseline-ui)<a href="https://agentmods.dev/skills/vercel-labs/open-agents/baseline-ui"><img src="https://agentmods.dev/badge/skills/vercel-labs/open-agents/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 | $0.00048 | $0.00777 |
| Opus 5 | $0.00024 | $0.00388 |
| Sonnet 5 | $0.00010 | $0.00155 |
| Haiku 4.5 | $0.00005 | $0.00078 |
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 6d 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
86% identical to baseline-ui — 2 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 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.
- 6d ago First seen · 86 lines · 48 tokens per session scan A 9bb2f868098a
baseline-ui is a skill published in the GitHub repository vercel-labs/open-agents (5,805 stars, last pushed 8d ago), licensed MIT. It adds 48 tokens to every session and 777 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to baseline-ui, differing in 2 lines, and is treated as a copy.
Other skills, from other repositories
agentos-ui-ux
Design, review, or implement AgentOS UI and UX work using the project’s operator-console visual system. Use for React/Tailwind pages, cards, dialogs, mobile layouts, theme work, navigation, forms, empty/loading/error states, and UI consistency reviews in AgentOS.
frontend-design
Create distinctive, production-grade frontend interfaces.
responsive-design-advisor
Design responsive layouts with breakpoints, mobile-first approach, and flexible grids. Use when creating responsive designs, implementing breakpoints, or optimizing for multiple screen sizes.
aidd-ui
Design beautiful and friendly user interfaces and experiences. Use when building UI components, styling, animations, accessibility, responsive design, or working with design systems.
uiux-ui-ux-pro-max
Skill "uiux-ui-ux-pro-max" from KornLabs/truss, covering ui/ux pro max - design intelligence, when to apply, rule categories by priority, running the search tool and workflow.
uiux-ui-styling
Skill "uiux-ui-styling" from KornLabs/truss, covering ui styling skill, reference, when to use this skill, core stack and component layer: shadcn/ui.