Admin
yc-software/qm
Act for an org admin — the admin API (scope directory, per-scope config & SOUL, any scope's memory, transcripts & captured prompts, files, user roster & external users, audit/errors/metrics/egress)…
A skill your agent uses when reviewing dashboards, admin tables, search results, or feeds with many repeated items.
MITAuto-check passed
Install List Virtualization
$ npx skills add thedaviddias/Front-End-Checklist --skill list-virtualization -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install thedaviddias/Front-End-Checklist list-virtualization --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/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/list-virtualization .claude/skills/list-virtualization && 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 "list-virtualization" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualization into .claude/skills/list-virtualization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "list-virtualization", 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/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualizationType 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 thedaviddias/Front-End-Checklist --skill list-virtualization -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install thedaviddias/Front-End-Checklist list-virtualization --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/list-virtualization .agents/skills/list-virtualization && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "list-virtualization" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualization into .agents/skills/list-virtualization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "list-virtualization", 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 thedaviddias/Front-End-Checklist --skill list-virtualization -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install thedaviddias/Front-End-Checklist list-virtualization --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/list-virtualization .cursor/skills/list-virtualization && 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 "list-virtualization" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualization into .cursor/skills/list-virtualization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "list-virtualization", 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/thedaviddias/Front-End-Checklist.git --path skills/list-virtualization--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 thedaviddias/Front-End-Checklist --skill list-virtualization -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install thedaviddias/Front-End-Checklist list-virtualization --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/list-virtualization .gemini/skills/list-virtualization && 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 "list-virtualization" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualization into .gemini/skills/list-virtualization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "list-virtualization", 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 thedaviddias/Front-End-Checklist list-virtualizationInstalls 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 thedaviddias/Front-End-Checklist --skill list-virtualization -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/list-virtualization .github/skills/list-virtualization && 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 "list-virtualization" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualization into .github/skills/list-virtualization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "list-virtualization", 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 thedaviddias/Front-End-Checklist --skill list-virtualization -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install thedaviddias/Front-End-Checklist list-virtualization --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/thedaviddias/Front-End-Checklist.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/list-virtualization .opencode/skills/list-virtualization && 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 "list-virtualization" agent skill from https://github.com/thedaviddias/Front-End-Checklist/tree/main/skills/list-virtualization into .opencode/skills/list-virtualization/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "list-virtualization", 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
list-virtualization- GitHub stars
- 74k
- Token cost
- ~553 tokens
- SKILL.md length
- 233 words
- Files
- 2 (incl. references)
- Skills in repo
- 390
- Repo updated
- First seen
- Licence
- MIT
At a glance
A skill your agent uses when reviewing dashboards, admin tables, search results, or feeds with many repeated items.
- Reviewing dashboards
- SKILL.md covers Quick Reference, Check, Fix and Explain, plus 1 more section
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Feeds with many repeated items
What it does
List Virtualization is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing dashboards, admin tables, search results, or feeds with many repeated items. Confirm the bottleneck is DOM or rendering cost before introducing virtualization because small lists usually do not need the added complexity.
Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/rule.md`).
The repository describes itself as: 🗂 The essential checklist for modern web development, for humans and AI agents. The licence is MIT.
When your agent uses it
- Reviewing dashboards
- Feeds with many repeated items
Example prompts
- “/list-virtualization”
What it can do on your machine
Read from SKILL.md and the folder at commit e8d14d0. 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.
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):
frontendchecklist.io
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
List Virtualization loads about 553 tokens when it runs, and up to ~1.4k if it reads all its reference files. Until then it costs about 65 tokens; SKILL.md has 233 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
The full file from thedaviddias/Front-End-Checklist at commit e8d14d0, republished under its MIT licence (© thedaviddias). 233 words, ~553 tokens.
Download SKILL.mdSave it as
.claude/skills/list-virtualization/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.- name
- list-virtualization
- description
- Use when reviewing dashboards, admin tables, search results, or feeds with many repeated items. Confirm the bottleneck is DOM or rendering cost before introducing virtualization because small lists usually do not need the added complexity.
- metadata.category
- performance
- metadata.priority
- high
- metadata.difficulty
- intermediate
- metadata.estimatedTime
- 25
- metadata.source
- frontendchecklist.io
- metadata.url
- https://frontendchecklist.io/rules/performance/list-virtualization
Virtualize long lists and tables
Rendering hundreds or thousands of rows at once wastes memory and makes style calculation, layout, and painting more expensive. Virtualization keeps large collections responsive by limiting the number of mounted nodes.
Quick Reference
- Render only what is visible plus a small overscan buffer instead of the entire list
- Use virtualization when repeated rows or cards push DOM size and layout cost too high
- Preserve item sizing, keyboard access, and screen-reader semantics when windowing content
- Measure scroll smoothness, memory use, and DOM node count before and after the change
Check
Inspect long lists, tables, grids, and feeds for places where the UI renders every item at once. Flag views where the number of mounted rows or cards is large enough to create DOM, memory, or scroll-performance issues.
Fix
Introduce list or table virtualization so only the visible rows plus overscan render, while preserving sizing, keyboard navigation, and any required sticky headers or selection behavior.
Explain
Explain list virtualization, why it improves performance for large collections, and the tradeoffs engineers need to watch for around measurement and accessibility.
Code Review
Inspect collection components, data tables, infinite feeds, and dashboards. Flag places where rendering the full dataset creates excessive DOM nodes or scroll jank, and verify the virtualization strategy still preserves item identity, semantics, and expected interactions.
For full implementation details, code examples, and framework-specific guidance,
see references/rule.md.
Rule page: https://frontendchecklist.io/rules/performance/list-virtualization
© thedaviddias, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 1 other file (references) in skills/list-virtualization of thedaviddias/Front-End-Checklist.
- SKILL.md
- references/rule.md
Open the folder on GitHubat commit e8d14d0
Compare with similar skills
List Virtualization 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 |
|---|---|---|---|---|---|---|
| List Virtualization this skillthedaviddias/Front-End-Checklist | 74k | — | ~553 | Automated safety check: Pass | MIT | |
| Adminyc-software/qm | 15k | — | ~3.1k | Automated safety check: Pass | MIT | |
| DashboardInsForge/InsForge | 13k | — | ~2.3k | Automated safety check: Pass | Apache-2.0 | |
| Live DashboardNousResearch/hermes-agent | 252k | — | ~2.1k | Automated safety check: Pass | MIT | |
| Table Fitasgeirtj/system_prompts_leaks | 69k | — | ~772 | Automated safety check: Pass | CC0-1.0 | |
| Live Dashboardnexu-io/open-design | 100k | — | ~2.1k | Automated safety check: Pass | Apache-2.0 |
Similar skills
Dashboard
InsForge/InsForge
A skill your agent uses when contributing to InsForge's shared dashboard package.
Live Dashboard
NousResearch/hermes-agent
Build self-updating dashboards from live sources. An agent skill from NousResearch/hermes-agent.
Table Fit
asgeirtj/system_prompts_leaks
Keep a Markdown table readable in a narrow terminal of about 100 display columns - a wide table or one carrying prose in its cells wraps into unreadable ragged rows.
Live Dashboard
nexu-io/open-design
Notion-style team dashboard rendered as a Live Artifact. An agent skill from nexu-io/open-design.
GitHub Dashboard
nexu-io/open-design
GitHub repository analytics dashboard — stars, forks, contributors, issues, pull requests, recent activity, and top contributors.
More from thedaviddias/Front-End-Checklist
All 390 skills in this repoContent Dates Audit
thedaviddias/Front-End-Checklist
Audits article and blog pages for visible publish dates, Article JSON-LD with datePublished and dateModified, and Open Graph time tags, then fixes what is missing.
FAQPage Schema Markup
thedaviddias/Front-End-Checklist
Adds, checks and fixes FAQPage JSON-LD on pages with visible question-and-answer sections so it matches what readers see and can qualify for rich results.
Favicon Audit and Setup
thedaviddias/Front-End-Checklist
Checks that a site's favicon is linked, reachable and large enough for Google search results, and sets up ICO, SVG and Apple touch icon files when they are missing.
Content Freshness Signals
thedaviddias/Front-End-Checklist
Audits article pages for freshness signals, covering the Last-Modified header, Article JSON-LD dateModified and a visible last-updated date, and fixes mismatches.
Geo Meta Tags Audit
thedaviddias/Front-End-Checklist
Audits and fixes geo.region, geo.placename and geo.position meta tags on regional pages, noting where they help (Bing) and where they do not (Google).
Improve a Front-End Checklist Rule
thedaviddias/Front-End-Checklist
Scores and rewrites a Front-End Checklist rule MDX file against a scored quality rubric, replacing generic stub prompts with specific, actionable ones.
Questions about List Virtualization
What does List Virtualization do?
A skill your agent uses when reviewing dashboards, admin tables, search results, or feeds with many repeated items. List Virtualization is an agent skill from thedaviddias/Front-End-Checklist. Use when reviewing dashboards, admin tables, search results, or feeds with many repeated items.
When should I use List Virtualization?
List Virtualization fits situations like: reviewing dashboards; feeds with many repeated items.
How do I install List Virtualization in Claude Code?
Run `npx skills add thedaviddias/Front-End-Checklist --skill list-virtualization -a claude-code`. Or copy the skill folder (skills/list-virtualization in thedaviddias/Front-End-Checklist) into .claude/skills/list-virtualization in your project. Claude Code loads it when a task matches its description.
How do I install List Virtualization in Codex?
Run `npx skills add thedaviddias/Front-End-Checklist --skill list-virtualization -a codex`. Or copy the skill folder (skills/list-virtualization in thedaviddias/Front-End-Checklist) into .agents/skills/list-virtualization in your project. Codex loads it when a task matches its description.
Can I use List Virtualization 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 thedaviddias/Front-End-Checklist --skill list-virtualization -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/list-virtualization, .gemini/skills/list-virtualization, .github/skills/list-virtualization and .opencode/skills/list-virtualization in your project.
What does List Virtualization need to run?
SKILL.md names no scripts, command-line tools or credentials: List Virtualization is instructions for the agent only.
Does List Virtualization access the network?
SKILL.md names 1 domain. As links in the text: frontendchecklist.io. This is read from the text; nothing was executed.
Is List Virtualization 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 List Virtualization use?
List Virtualization is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does List Virtualization use?
About 553 tokens (SKILL.md is roughly 2.2k 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 804 tokens, read only when the agent opens those files.
What are the alternatives to List Virtualization?
Skills that share tags, products or a category with List Virtualization: Admin (yc-software/qm, 15k stars), Dashboard (InsForge/InsForge, 13k stars), Live Dashboard (NousResearch/hermes-agent, 252k stars) and Table Fit (asgeirtj/system_prompts_leaks, 69k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains List Virtualization?
thedaviddias (a GitHub user) maintains it in thedaviddias/Front-End-Checklist, which has 74,398 GitHub stars. The repository holds 390 skills in this directory. The repository was last updated on October 6, 2026.
Source: thedaviddias/Front-End-Checklist on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.