Agent skill

User Guide

by ad-repo in ad-repo/nullplayer

User-facing features, menus, keyboard shortcuts, and functionality overview.

Custom licenceAuto-check passedWriting & Content

Install User Guide

skills CLI
$ npx skills add ad-repo/nullplayer --skill user-guide -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install ad-repo/nullplayer user-guide --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/ad-repo/nullplayer.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/user-guide .claude/skills/user-guide && rm -rf skills-src

Use ~/.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/

Facts

Skill name
user-guide
GitHub stars
158
Token cost
~9.3k tokens
SKILL.md length
5,075 words
Files
1
Skills in repo
39
Repo updated
First seen
Licence
Custom licence

At a glance

User-facing features, menus, keyboard shortcuts, and functionality overview.

  • Documenting features
  • SKILL.md covers System Requirements, Core Features, Media Sources and Output Devices & Casting
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
  • Understanding user workflows

What it does

User Guide is an agent skill from ad-repo/nullplayer. User-facing features, menus, keyboard shortcuts, and functionality overview. Use when documenting features, understanding user workflows, or explaining capabilities to users.

Its SKILL.md is about 9.3k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Writing & Content, covering Technical writing. It works with macOS. The repository describes itself as: nullPlayer is a free open source macOS media player with some unique features.

When your agent uses it

  • Documenting features
  • Understanding user workflows
  • Explaining capabilities to users

Example prompts

  • “/user-guide”

What it can do on your machine

Read from SKILL.md and the folder at commit 04582d1. 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

User Guide loads about 9.3k tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 5,075 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~46
When it runs · the whole SKILL.md, loaded when a task matches
~9.3k

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 5,075 words (~9,252 tokens).

“A faithful recreation of Winamp 2.x for macOS with Plex/Jellyfin/Subsonic integration, ProjectM visualizations, and casting support.”

— opening of SKILL.md by ad-repo, Custom licence
name
user-guide

Read the full SKILL.md on GitHub

Files

Just SKILL.md in skills/user-guide of ad-repo/nullplayer.

Open the folder on GitHubat commit 04582d1

Compare with similar skills

User 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.

User Guide compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
User Guide this skillad-repo/nullplayer158—~9.3kAutomated safety check: PassCustom licence
Agentdock User Guideuvwt/agentdock1.2k—~1.6kAutomated safety check: PassApache-2.0
JavaScript Concept Fact Checkerleonardomso/33-js-concepts67k1 repos~5kAutomated safety check: PassMIT
Beads Documentation Style Guidegastownhall/beads28k—~3.2kAutomated safety check: PassMIT
JavaScript Concept Page Workflowleonardomso/33-js-concepts67k—~3.9kAutomated safety check: PassMIT
JS Concept Resource Curatorleonardomso/33-js-concepts67k—~4.9kAutomated safety check: PassMIT

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    1.2k GitHub stars~1.6k tokensUpdated 2 days ago
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  • Chromecast Casting

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Works with

Questions about User Guide

What does User Guide do?

User-facing features, menus, keyboard shortcuts, and functionality overview. User Guide is an agent skill from ad-repo/nullplayer. User-facing features, menus, keyboard shortcuts, and functionality overview.

When should I use User Guide?

User Guide fits situations like: documenting features; understanding user workflows; explaining capabilities to users.

How do I install User Guide in Claude Code?

Run `npx skills add ad-repo/nullplayer --skill user-guide -a claude-code`. Or copy the skill folder (skills/user-guide in ad-repo/nullplayer) into .claude/skills/user-guide in your project. Claude Code loads it when a task matches its description.

How do I install User Guide in Codex?

Run `npx skills add ad-repo/nullplayer --skill user-guide -a codex`. Or copy the skill folder (skills/user-guide in ad-repo/nullplayer) into .agents/skills/user-guide in your project. Codex loads it when a task matches its description.

Can I use User 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 user-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/user-guide, .gemini/skills/user-guide, .github/skills/user-guide and .opencode/skills/user-guide in your project.

What does User Guide need to run?

SKILL.md names no scripts, command-line tools or credentials: User Guide is instructions for the agent only.

Does User 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 User 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 User Guide use?

User 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 User Guide use?

About 9.3k tokens (SKILL.md is roughly 37k 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 User Guide?

Skills that share tags, products or a category with User Guide: Agentdock User Guide (uvwt/agentdock, 1.2k stars), JavaScript Concept Fact Checker (leonardomso/33-js-concepts, 67k stars), Beads Documentation Style Guide (gastownhall/beads, 28k stars) and JavaScript Concept Page Workflow (leonardomso/33-js-concepts, 67k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains User Guide?

ad-repo (a GitHub user) maintains it in ad-repo/nullplayer, which has 158 GitHub stars. The repository holds 39 skills in this directory. The repository was last updated on October 9, 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.