Web Artifacts Builder
anthropics/skills
Builds multi-component claude.ai HTML artifacts as a small React, TypeScript and Tailwind project, then bundles it into one shareable HTML file.
Build virtualized lists, grids, and tables with react-virtuoso.
No licenceAuto-check passed
Install React Virtuoso
$ npx skills add petyosi/react-virtuoso --skill react-virtuoso -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install petyosi/react-virtuoso react-virtuoso --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/petyosi/react-virtuoso.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/react-virtuoso .claude/skills/react-virtuoso && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "react-virtuoso" agent skill from https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuoso into .claude/skills/react-virtuoso/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-virtuoso", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuosoType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add petyosi/react-virtuoso --skill react-virtuoso -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install petyosi/react-virtuoso react-virtuoso --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/petyosi/react-virtuoso.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/react-virtuoso .agents/skills/react-virtuoso && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "react-virtuoso" agent skill from https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuoso into .agents/skills/react-virtuoso/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-virtuoso", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add petyosi/react-virtuoso --skill react-virtuoso -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install petyosi/react-virtuoso react-virtuoso --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/petyosi/react-virtuoso.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/react-virtuoso .cursor/skills/react-virtuoso && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "react-virtuoso" agent skill from https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuoso into .cursor/skills/react-virtuoso/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-virtuoso", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/petyosi/react-virtuoso.git --path skills/react-virtuoso--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add petyosi/react-virtuoso --skill react-virtuoso -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install petyosi/react-virtuoso react-virtuoso --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/petyosi/react-virtuoso.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/react-virtuoso .gemini/skills/react-virtuoso && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "react-virtuoso" agent skill from https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuoso into .gemini/skills/react-virtuoso/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-virtuoso", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install petyosi/react-virtuoso react-virtuosoInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add petyosi/react-virtuoso --skill react-virtuoso -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/petyosi/react-virtuoso.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/react-virtuoso .github/skills/react-virtuoso && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "react-virtuoso" agent skill from https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuoso into .github/skills/react-virtuoso/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-virtuoso", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add petyosi/react-virtuoso --skill react-virtuoso -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install petyosi/react-virtuoso react-virtuoso --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/petyosi/react-virtuoso.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/react-virtuoso .opencode/skills/react-virtuoso && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "react-virtuoso" agent skill from https://github.com/petyosi/react-virtuoso/tree/main/skills/react-virtuoso into .opencode/skills/react-virtuoso/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "react-virtuoso", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
react-virtuoso- GitHub stars
- 6.5k
- Token cost
- ~3.4k tokens
- SKILL.md length
- 923 words
- Files
- 37 (incl. references)
- Skills in repo
- 5
- Repo updated
- First seen
- Licence
- None found
At a glance
Build virtualized lists, grids, and tables with react-virtuoso.
- Rendering large
- SKILL.md covers Picking the right component, What you do NOT need to do, Core rules and Common patterns, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Building grouped lists with sticky headers
What it does
React Virtuoso is an agent skill from petyosi/react-virtuoso. Build virtualized lists, grids, and tables with react-virtuoso. Use this skill when (1) rendering large or infinite lists, (2) building grouped lists with sticky headers, (3) virtualizing HTML tables, (4) laying out same-sized items in a responsive grid, (5) building feeds or logs that follow new items at the bottom, (6) diagnosing virtualization symptoms such as jumpy scrolling, a list that does not scroll to the bottom, items overlapping, blank items, or "zero-sized element" errors, or (7) any task involving…
Its SKILL.md is about 3.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 38 other files, including reference files (for example `references/1.virtuoso/auto-resizing.md`, `references/1.virtuoso/basic-usage.md` and `references/1.virtuoso/custom-scroll-container.md`).
It works with React. The repository describes itself as: The most powerful virtual list component for React.
When your agent uses it
- Rendering large
- Building grouped lists with sticky headers
- Virtualizing HTML tables
- Laying out same-sized items in a responsive grid
Example prompts
- “zero-sized element”
- “/react-virtuoso”
What it can do on your machine
Read from SKILL.md and the folder at commit b2a02d0. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are typescript).
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
virtuoso.dev
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
React Virtuoso loads about 3.4k tokens when it runs, and up to ~21k if it reads all its reference files. Until then it costs about 162 tokens; SKILL.md has 923 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 923 words (~3,394 tokens).
“react-virtuoso renders only the visible portion of large lists, grids, and tables. It measures item sizes automatically with ResizeObserver — variable item heights work out of the box, with no size configuration.”
- name
- react-virtuoso
Files
SKILL.md and 36 other files (references) in skills/react-virtuoso of petyosi/react-virtuoso.
- SKILL.md
- references/1.virtuoso/auto-resizing.md
- references/1.virtuoso/basic-usage.md
- references/1.virtuoso/custom-scroll-container.md
- references/1.virtuoso/customize-rendering.md
- references/1.virtuoso/endless-scrolling.md
- references/1.virtuoso/footer.md
- references/1.virtuoso/horizontal-mode.md
- references/1.virtuoso/initial-index.md
- references/1.virtuoso/keyboard-navigation.md
- references/1.virtuoso/press-to-load-more.md
- references/1.virtuoso/range-change-callback.md
- references/1.virtuoso/scroll-handling.md
- references/1.virtuoso/scroll-seek-placeholders.md
- references/1.virtuoso/scroll-to-index.md
- references/1.virtuoso/tailwind-test.md
- references/1.virtuoso/top-items.md
- references/1.virtuoso/window-scrolling.md
- references/2.grouped-virtuoso
- … and 18 more
Open the folder on GitHubat commit b2a02d0
Compare with similar skills
React Virtuoso next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| React Virtuoso this skillpetyosi/react-virtuoso | 6.5k | — | ~3.4k | Automated safety check: Pass | None | |
| Web Artifacts Builderanthropics/skills | 180k | 40 repos | ~769 | Automated safety check: Pass | Apache-2.0 | |
| Vercel Composition Patternssupabase/supabase | 111k | 58 repos | ~726 | Automated safety check: Pass | MIT | |
| React Doctormakeplane/plane | 61k | 12 repos | ~657 | Automated safety check: Pass | AGPL-3.0 | |
| React Router Developmentremix-run/react-router | 57k | 1 repos | ~1.5k | Automated safety check: Pass | MIT | |
| React UI State PatternsChrisWiles/claude-code-showcase | 6.1k | 8 repos | ~1.6k | Automated safety check: Pass | None |
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- Official
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Vercel Composition Patterns
supabase/supabase
React composition patterns that scale. An agent skill from supabase/supabase.
React Doctor
makeplane/plane
Scans React code for lint, accessibility, bundle size and architecture issues, reports a health score and checks that changes do not lower it.
React Router Development
remix-run/react-router
Guides work on React Router apps by first identifying whether the app uses Framework, Data or Declarative mode, then loading the matching reference and the installed package docs.
React UI State Patterns
ChrisWiles/claude-code-showcase
Sets patterns for React interfaces: when to show loading spinners or skeletons, how to surface errors, how to disable buttons during async work and how to handle empty lists.
Electron Multi-Process Architecture
iOfficeAI/AionUi
Tells the agent where new code belongs in an Electron multi-process project and which APIs each process may use, with rules for new bridges, services, agents and workers.
More from petyosi/react-virtuoso
Message List
petyosi/react-virtuoso
Build chat, messaging, and AI conversation UIs with @virtuoso.dev/message-list.
Reactive Engine
petyosi/react-virtuoso
Manage application state with the @virtuoso.dev/reactive-engine- package family.
Data Table
petyosi/react-virtuoso
Build virtualized data tables with @virtuoso.dev/data-table.
Docs Guidance
petyosi/react-virtuoso
Revises project documentation for human readability, conceptual flow, and example safety.
Related
Works with
Questions about React Virtuoso
What does React Virtuoso do?
Build virtualized lists, grids, and tables with react-virtuoso. React Virtuoso is an agent skill from petyosi/react-virtuoso. Build virtualized lists, grids, and tables with react-virtuoso.
When should I use React Virtuoso?
React Virtuoso fits situations like: rendering large; building grouped lists with sticky headers; virtualizing HTML tables; laying out same-sized items in a responsive grid.
How do I install React Virtuoso in Claude Code?
Run `npx skills add petyosi/react-virtuoso --skill react-virtuoso -a claude-code`. Or copy the skill folder (skills/react-virtuoso in petyosi/react-virtuoso) into .claude/skills/react-virtuoso in your project. Claude Code loads it when a task matches its description.
How do I install React Virtuoso in Codex?
Run `npx skills add petyosi/react-virtuoso --skill react-virtuoso -a codex`. Or copy the skill folder (skills/react-virtuoso in petyosi/react-virtuoso) into .agents/skills/react-virtuoso in your project. Codex loads it when a task matches its description.
Can I use React Virtuoso in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add petyosi/react-virtuoso --skill react-virtuoso -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/react-virtuoso, .gemini/skills/react-virtuoso, .github/skills/react-virtuoso and .opencode/skills/react-virtuoso in your project.
What does React Virtuoso need to run?
SKILL.md names no scripts, command-line tools or credentials: React Virtuoso is instructions for the agent only.
Does React Virtuoso access the network?
SKILL.md names 1 domain. As links in the text: virtuoso.dev. This is read from the text; nothing was executed.
Is React Virtuoso safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does React Virtuoso use?
No licence was found for React Virtuoso or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does React Virtuoso use?
About 3.4k tokens (SKILL.md is roughly 14k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 18k tokens, read only when the agent opens those files.
What are the alternatives to React Virtuoso?
Skills that share tags, products or a category with React Virtuoso: Web Artifacts Builder (anthropics/skills, 180k stars), Vercel Composition Patterns (supabase/supabase, 111k stars), React Doctor (makeplane/plane, 61k stars) and React Router Development (remix-run/react-router, 57k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains React Virtuoso?
petyosi (a GitHub user) maintains it in petyosi/react-virtuoso, which has 6,466 GitHub stars. The repository holds 5 skills in this directory. The repository was last updated on October 1, 2026.
Source: petyosi/react-virtuoso on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.