Skin Health Analyzer
sickn33/agentic-awesome-skills
Analyze skin health data, identify skin problem patterns, assess skin health status.
Original skin engine, skin.json schema, element catalog, and custom skin creation.
Custom licenceAuto-check passed
Install Original Skin Guide
$ npx skills add ad-repo/nullplayer --skill original-skin-guide -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ad-repo/nullplayer original-skin-guide --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/ad-repo/nullplayer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/original-skin-guide .claude/skills/original-skin-guide && 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 "original-skin-guide" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/original-skin-guide into .claude/skills/original-skin-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "original-skin-guide", 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/ad-repo/nullplayer/tree/main/skills/original-skin-guideType 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 ad-repo/nullplayer --skill original-skin-guide -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ad-repo/nullplayer original-skin-guide --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/original-skin-guide .agents/skills/original-skin-guide && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "original-skin-guide" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/original-skin-guide into .agents/skills/original-skin-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "original-skin-guide", 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 ad-repo/nullplayer --skill original-skin-guide -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ad-repo/nullplayer original-skin-guide --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/original-skin-guide .cursor/skills/original-skin-guide && 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 "original-skin-guide" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/original-skin-guide into .cursor/skills/original-skin-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "original-skin-guide", 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/ad-repo/nullplayer.git --path skills/original-skin-guide--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 ad-repo/nullplayer --skill original-skin-guide -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ad-repo/nullplayer original-skin-guide --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/original-skin-guide .gemini/skills/original-skin-guide && 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 "original-skin-guide" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/original-skin-guide into .gemini/skills/original-skin-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "original-skin-guide", 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 ad-repo/nullplayer original-skin-guideInstalls 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 ad-repo/nullplayer --skill original-skin-guide -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/original-skin-guide .github/skills/original-skin-guide && 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 "original-skin-guide" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/original-skin-guide into .github/skills/original-skin-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "original-skin-guide", 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 ad-repo/nullplayer --skill original-skin-guide -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ad-repo/nullplayer original-skin-guide --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/original-skin-guide .opencode/skills/original-skin-guide && 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 "original-skin-guide" agent skill from https://github.com/ad-repo/nullplayer/tree/main/skills/original-skin-guide into .opencode/skills/original-skin-guide/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "original-skin-guide", 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
original-skin-guide- GitHub stars
- 158
- Token cost
- ~3.9k tokens
- SKILL.md length
- 1,317 words
- Files
- 3
- Skills in repo
- 40
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Original skin engine, skin.json schema, element catalog, and custom skin creation.
- Works in 3 steps: JSON configuration (skin.json) --… → PNG image assets -- optional per-element… → Programmatic fallback -- elements…
- Modifying Original skins
- SKILL.md covers Overview, Skin Directory Structure, skin.json Schema and Color Palette, plus 9 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Original Skin Guide is an agent skill from ad-repo/nullplayer. Original skin engine, skin.json schema, element catalog, and custom skin creation. Use when creating or modifying Original skins, working on ModernSkin components, or adding UI elements to the Original system.
Its SKILL.md is about 3.9k tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `advanced-features.md` and `element-reference.md`).
The repository describes itself as: nullPlayer is a free open source macOS media player with some unique features.
When your agent uses it
- Modifying Original skins
- Working on ModernSkin components
- Adding UI elements to the Original system
Example prompts
- “/original-skin-guide”
Workflow steps
3 steps, taken from the first numbered list in SKILL.md.
- JSON configuration (skin.json) -- colors, fonts, layout, animations
- PNG image assets -- optional per-element images
- Programmatic fallback -- elements without images are drawn using palette colors
What it can do on your machine
Read from SKILL.md and the folder at commit 3d87ce1. 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 json and bash).
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
Original Skin Guide loads about 3.9k tokens when it runs. Until then it costs about 57 tokens; SKILL.md has 1,317 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,317 words (~3,940 tokens).
“This guide covers creating custom skins for NullPlayer's Original UI mode. The implementation retains the modern name internally for compatibility.”
- name
- original-skin-guide
Files
SKILL.md and 2 other files in skills/original-skin-guide of ad-repo/nullplayer.
- SKILL.md
- advanced-features.md
- element-reference.md
Open the folder on GitHubat commit 3d87ce1
Compare with similar skills
Original Skin Guide 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 |
|---|---|---|---|---|---|---|
| Original Skin Guide this skillad-repo/nullplayer | 158 | — | ~3.9k | Automated safety check: Pass | Custom licence | |
| Skin Health Analyzersickn33/agentic-awesome-skills | 47k | 2 repos | ~293 | Automated safety check: Pass | MIT | |
| Decorative Elementsthedaviddias/Front-End-Checklist | 74k | — | ~672 | Automated safety check: Pass | MIT | |
| Scaffold Elementremotion-dev/remotion | 63k | — | ~202 | Automated safety check: Pass | Custom licence | |
| Html5 Semantic Elementsthedaviddias/Front-End-Checklist | 74k | — | ~449 | Automated safety check: Pass | MIT | |
| Cross Origin Securitythedaviddias/Front-End-Checklist | 74k | — | ~595 | Automated safety check: Pass | MIT |
Similar skills
Decorative Elements
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing rendered HTML, interactive components, or design-system patterns related to Hide decorative elements from assistive technology.
- Official
Scaffold Element
remotion-dev/remotion
Scaffold a new Remotion Element for development in the docs Remotion Studio.
Html5 Semantic Elements
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing templates, rendered HTML, or shared components related to Use semantic HTML elements.
Cross Origin Security
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing scripts, client components, bundles, or runtime behavior related to Handle cross-origin requests securely.
Cross Origin Isolation
thedaviddias/Front-End-Checklist
A skill your agent uses when reviewing security-sensitive web apps, SharedArrayBuffer usage, worker-heavy apps, editors, or measurement features that require cross-origin isolation.
More from ad-repo/nullplayer
All 40 skills in this repoSkin Screenshots
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Capture one centred main-window screenshot per skin across every skin system (Classic, Original, Original-Metal, Modern/.wal, Media Player/.wmz, Audion Faces) and assemble them into a fixed-duration…
Vis Classic Guide
ad-repo/nullplayer
Comprehensive implementation and profile reference for NullPlayer's visclassic mode (CVisClassicCore, VisClassicBridge, SpectrumAnalyzerView integration, menu/keyboard controls…
App Control
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Launch, configure, drive, screenshot and measure the running NullPlayer app.
Chromecast Casting
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Google Cast Protocol v2, message framing, debugging, and test scripts.
Emby Integration
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Emby API, authentication flow, rating scale, streaming, scrobbling, and video playback.
Live UI Testing
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How to debug a defect that only exists on screen — instrument first, drive the app yourself, and measure what is actually drawn.
Questions about Original Skin Guide
What does Original Skin Guide do?
Original skin engine, skin.json schema, element catalog, and custom skin creation. Original Skin Guide is an agent skill from ad-repo/nullplayer.json schema, element catalog, and custom skin creation.
When should I use Original Skin Guide?
Original Skin Guide fits situations like: modifying Original skins; working on ModernSkin components; adding UI elements to the Original system.
How do I install Original Skin Guide in Claude Code?
Run `npx skills add ad-repo/nullplayer --skill original-skin-guide -a claude-code`. Or copy the skill folder (skills/original-skin-guide in ad-repo/nullplayer) into .claude/skills/original-skin-guide in your project. Claude Code loads it when a task matches its description.
How do I install Original Skin Guide in Codex?
Run `npx skills add ad-repo/nullplayer --skill original-skin-guide -a codex`. Or copy the skill folder (skills/original-skin-guide in ad-repo/nullplayer) into .agents/skills/original-skin-guide in your project. Codex loads it when a task matches its description.
Can I use Original Skin Guide 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 ad-repo/nullplayer --skill original-skin-guide -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/original-skin-guide, .gemini/skills/original-skin-guide, .github/skills/original-skin-guide and .opencode/skills/original-skin-guide in your project.
What does Original Skin Guide need to run?
SKILL.md names no scripts, command-line tools or credentials: Original Skin Guide is instructions for the agent only.
Does Original Skin Guide 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 Original Skin Guide 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 Original Skin Guide use?
Original Skin Guide has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Original Skin Guide use?
About 3.9k tokens (SKILL.md is roughly 16k 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 Original Skin Guide?
Skills that share tags, products or a category with Original Skin Guide: Skin Health Analyzer (sickn33/agentic-awesome-skills, 47k stars), Decorative Elements (thedaviddias/Front-End-Checklist, 74k stars), Scaffold Element (remotion-dev/remotion, 63k stars) and Html5 Semantic Elements (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 Original Skin Guide?
ad-repo (a GitHub user) maintains it in ad-repo/nullplayer, which has 158 GitHub stars. The repository holds 40 skills in this directory. The repository was last updated on October 10, 2026.
Source: ad-repo/nullplayer on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.