CSS Minification
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing stylesheets, component styles, and responsive behavior related to Minify all CSS files.
Create or change FiveM NUI HTML/CSS/JS and its resource manifests, messages, callbacks and focus.
GPL-3.0Auto-check passed
Install Fivem Nui
$ npx skills add sky-systems/sky_phone --skill fivem-nui -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sky-systems/sky_phone fivem-nui --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/sky-systems/sky_phone.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/fivem-nui .claude/skills/fivem-nui && 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 "fivem-nui" agent skill from https://github.com/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nui into .claude/skills/fivem-nui/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fivem-nui", 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/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nuiType 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 sky-systems/sky_phone --skill fivem-nui -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sky-systems/sky_phone fivem-nui --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sky-systems/sky_phone.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/fivem-nui .agents/skills/fivem-nui && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "fivem-nui" agent skill from https://github.com/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nui into .agents/skills/fivem-nui/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fivem-nui", 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 sky-systems/sky_phone --skill fivem-nui -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sky-systems/sky_phone fivem-nui --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sky-systems/sky_phone.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/fivem-nui .cursor/skills/fivem-nui && 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 "fivem-nui" agent skill from https://github.com/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nui into .cursor/skills/fivem-nui/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fivem-nui", 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/sky-systems/sky_phone.git --path .agents/skills/fivem-nui--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 sky-systems/sky_phone --skill fivem-nui -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sky-systems/sky_phone fivem-nui --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sky-systems/sky_phone.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/fivem-nui .gemini/skills/fivem-nui && 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 "fivem-nui" agent skill from https://github.com/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nui into .gemini/skills/fivem-nui/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fivem-nui", 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 sky-systems/sky_phone fivem-nuiInstalls 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 sky-systems/sky_phone --skill fivem-nui -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sky-systems/sky_phone.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/fivem-nui .github/skills/fivem-nui && 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 "fivem-nui" agent skill from https://github.com/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nui into .github/skills/fivem-nui/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fivem-nui", 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 sky-systems/sky_phone --skill fivem-nui -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sky-systems/sky_phone fivem-nui --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sky-systems/sky_phone.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/fivem-nui .opencode/skills/fivem-nui && 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 "fivem-nui" agent skill from https://github.com/sky-systems/sky_phone/tree/dev/.agents/skills/fivem-nui into .opencode/skills/fivem-nui/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fivem-nui", 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
fivem-nui- GitHub stars
- 157
- Token cost
- ~550 tokens
- SKILL.md length
- 235 words
- Files
- 7
- Skills in repo
- 8
- Repo updated
- First seen
- Licence
- GPL-3.0
At a glance
Create or change FiveM NUI HTML/CSS/JS and its resource manifests, messages, callbacks and focus.
- Game/browser integration
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Use fivem-cef-rules for embedded-browser compatibility and lifecycle diagnosis
What it does
Fivem Nui is an agent skill from sky-systems/sky_phone. Create or change FiveM NUI HTML/CSS/JS and its resource manifests, messages, callbacks and focus. Use for game/browser integration; use fivem-cef-rules for embedded-browser compatibility and lifecycle diagnosis.
Its SKILL.md is about 550 tokens, which your agent loads only when the skill is triggered. The skill folder holds 6 other files (for example `best-practices.md`, `examples.md` and `fullscreen-nui.md`).
The repository describes itself as: Phone Script for FiveM. The licence is GPL-3.0.
When your agent uses it
- Game/browser integration
- Use fivem-cef-rules for embedded-browser compatibility and lifecycle diagnosis
Example prompts
- “/fivem-nui”
What it can do on your machine
Read from SKILL.md and the folder at commit 6b7b0a7. 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
No URLs in SKILL.md.
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
Fivem Nui loads about 550 tokens when it runs. Until then it costs about 55 tokens; SKILL.md has 235 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 sky-systems/sky_phone at commit 6b7b0a7, republished under its GPL-3.0 licence (© sky-systems). 235 words, ~550 tokens.
Download SKILL.mdSave it as
.claude/skills/fivem-nui/SKILL.md (or your agent's skills folder). This skill also uses 6 other files; get the full folder from GitHub.- name
- fivem-nui
- description
- Create or change FiveM NUI HTML/CSS/JS and its resource manifests, messages, callbacks and focus. Use for game/browser integration; use fivem-cef-rules for embedded-browser compatibility and lifecycle diagnosis.
FiveM NUI Integration
Trace the resource manifest, client transport, frontend listener/callback, and server authority before editing. Reuse the resource's existing transport and UI components. Keep a browser request being accepted separate from a server mutation succeeding.
Read only the relevant reference:
| Task | Reference |
|---|---|
| Add/package a UI or fix asset paths | setup.md |
| Send state, show/close UI, manage focus | fullscreen-nui.md |
| Browser-to-game callbacks and responses | nui-callbacks.md |
| Security, performance, error handling | best-practices.md |
| Verify platform/API facts | reference-links.md |
Before changing a Cfx API contract, verify official docs and the matching citizenfx/fivem implementation, registration, binding and call path. Record the inspected SHA and paths; prefer the deployed revision when identifiable. A docs example or a desktop browser alone is insufficient evidence.
Use the injected GetParentResourceName() with HTTPS callback URLs. Complete each callback exactly once on every reachable path. Never infer resource identity from the page hostname, blindly retry mutating requests, or treat client-side validation as authority. Gameplay permissions and mutations remain server-owned.
Register listeners before a ready/rehydration exchange; release focus and dispose owned effects on close/stop. Use fivem-cef-rules when compatibility, reloads, input, rendering or media matter, reading only its applicable references. An in-game runtime probe is required for compatibility claims.
Follow the repository build/copy rules and verify final manifest paths, generated asset URLs and affected callback routes. Test the changed behavior and report static/build/copy evidence separately from actual FiveM validation. Broaden to a full runtime matrix for a release or platform audit.
© sky-systems, GPL-3.0. 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 6 other files in .agents/skills/fivem-nui of sky-systems/sky_phone.
- SKILL.md
- best-practices.md
- examples.md
- fullscreen-nui.md
- nui-callbacks.md
- reference-links.md
- setup.md
Open the folder on GitHubat commit 6b7b0a7
Compare with similar skills
Fivem Nui 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 |
|---|---|---|---|---|---|---|
| Fivem Nui this skillsky-systems/sky_phone | 157 | — | ~550 | Automated safety check: Pass | GPL-3.0 | |
| CSS Minificationthedaviddias/Front-End-Checklist | 74k | — | ~415 | Automated safety check: Pass | MIT | |
| CSS Orderthedaviddias/Front-End-Checklist | 74k | — | ~404 | Automated safety check: Pass | MIT | |
| Unused CSSthedaviddias/Front-End-Checklist | 74k | — | ~415 | Automated safety check: Pass | MIT | |
| CSS Criticalthedaviddias/Front-End-Checklist | 74k | — | ~441 | Automated safety check: Pass | MIT | |
| Reset CSSthedaviddias/Front-End-Checklist | 74k | — | ~415 | Automated safety check: Pass | MIT |
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Implement or debug standalone skyphone Lua, events, adapters, persistence and NUI integration.
Fivem Basics
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Create or debug FiveM manifests, resource lifecycle, event boundaries and exports.
Lua Basics
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Diagnose or write FiveM Lua involving table semantics, scope, return values, errors or coroutine lifetimes.
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Inspect or repair ESX Legacy adapters and direct ESX integrations using the installed player, callback and inventory contracts.
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Questions about Fivem Nui
What does Fivem Nui do?
Create or change FiveM NUI HTML/CSS/JS and its resource manifests, messages, callbacks and focus. Fivem Nui is an agent skill from sky-systems/sky_phone. Create or change FiveM NUI HTML/CSS/JS and its resource manifests, messages, callbacks and focus.
When should I use Fivem Nui?
Fivem Nui fits situations like: game/browser integration; use fivem-cef-rules for embedded-browser compatibility and lifecycle diagnosis.
How do I install Fivem Nui in Claude Code?
Run `npx skills add sky-systems/sky_phone --skill fivem-nui -a claude-code`. Or copy the skill folder (.agents/skills/fivem-nui in sky-systems/sky_phone) into .claude/skills/fivem-nui in your project. Claude Code loads it when a task matches its description.
How do I install Fivem Nui in Codex?
Run `npx skills add sky-systems/sky_phone --skill fivem-nui -a codex`. Or copy the skill folder (.agents/skills/fivem-nui in sky-systems/sky_phone) into .agents/skills/fivem-nui in your project. Codex loads it when a task matches its description.
Can I use Fivem Nui 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 sky-systems/sky_phone --skill fivem-nui -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fivem-nui, .gemini/skills/fivem-nui, .github/skills/fivem-nui and .opencode/skills/fivem-nui in your project.
What does Fivem Nui need to run?
SKILL.md names no scripts, command-line tools or credentials: Fivem Nui is instructions for the agent only.
Does Fivem Nui access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Fivem Nui 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 Fivem Nui use?
Fivem Nui is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Fivem Nui use?
About 550 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.
What are the alternatives to Fivem Nui?
Skills that share tags, products or a category with Fivem Nui: CSS Minification (thedaviddias/Front-End-Checklist, 74k stars), CSS Order (thedaviddias/Front-End-Checklist, 74k stars), Unused CSS (thedaviddias/Front-End-Checklist, 74k stars) and CSS Critical (thedaviddias/Front-End-Checklist, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Fivem Nui?
sky-systems (a GitHub organization) maintains it in sky-systems/sky_phone, which has 157 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 7, 2026.
Source: sky-systems/sky_phone on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.