Agent skill

Visualizations

by ad-repo in ad-repo/nullplayer

Index of NullPlayer's visualization systems. An agent skill from ad-repo/nullplayer.

Custom licenceAuto-check passed

Install Visualizations

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

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

GitHub CLI
$ gh skill install ad-repo/nullplayer visualizations --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/visualizations .claude/skills/visualizations && 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
visualizations
GitHub stars
158
Token cost
~1.2k tokens
SKILL.md length
494 words
Files
1
Skills in repo
39
Repo updated
First seen
Licence
Custom licence

At a glance

Index of NullPlayer's visualization systems. An agent skill from ad-repo/nullplayer.

  • SKILL.md covers Persistence and Reset Policy, Sub-Skills and Comparison
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Visualizations is an agent skill from ad-repo/nullplayer. Index of NullPlayer's visualization systems. Use this to discover which sub-skill covers the specific visualizer you're working on (main window vis, spectrum window, album art, ProjectM/MilkDrop, Geiss, Tripex, visclassic, Metal mode internals).

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

The repository describes itself as: nullPlayer is a free open source macOS media player with some unique features.

Example prompts

  • “/visualizations”

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

Visualizations loads about 1.2k tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 494 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~65
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

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 494 words (~1,243 tokens).

“NullPlayer has several visualization stacks. Each has its own skill; this file is a router. Open the relevant sub-skill for details.”

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

Read the full SKILL.md on GitHub

Files

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

Open the folder on GitHubat commit 04582d1

Compare with similar skills

Visualizations 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.

Visualizations compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Visualizations this skillad-repo/nullplayer158—~1.2kAutomated safety check: PassCustom licence
Visualizeopenclaw/openclaw392k—~2.4kAutomated safety check: PassMIT
Indexabilitythedaviddias/Front-End-Checklist74k—~814Automated safety check: PassMIT
Visual Stylecalesthio/OpenMontage66k—~1.5kAutomated safety check: PassAGPL-3.0
D3 Visualizationnexu-io/open-design100k—~523Automated safety check: PassApache-2.0
Visual Regressionthedaviddias/Front-End-Checklist74k—~493Automated safety check: PassMIT

Similar skills

  • Visualize

    openclaw/openclaw

    Create inline visuals for code and explanations, or author persistent OpenClaw dashboard widgets with showwidget.

    392k GitHub stars~2.4k tokensUpdated today
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  • Indexability

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  • D3 Visualization

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    Teaches the agent to produce D3 charts and interactive data visualizations.

    100k GitHub stars~523 tokensUpdated today
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  • Visual Regression

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    A skill your agent uses when reviewing CI coverage, automated checks, or test strategy related to Use visual regression testing.

    74k GitHub stars~493 tokensUpdated 2 days ago
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  • Visualize

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    Builds a self-contained HTML page (chart, table, diagram, dashboard) to show inline in a thread.

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More from ad-repo/nullplayer

All 39 skills in this repo
  • Skin Screenshots

    ad-repo/nullplayer

    Capture one centred main-window screenshot per skin across every skin system (Classic, Original, Original-Metal, Modern/.wal, Media Player/.wmz) and assemble them into a fixed-duration slideshow GIF.

    158 GitHub stars~1.9k tokensUpdated today
    Auto-check passed
  • Vis Classic Guide

    ad-repo/nullplayer

    Comprehensive implementation and profile reference for NullPlayer's visclassic mode (CVisClassicCore, VisClassicBridge, SpectrumAnalyzerView integration, menu/keyboard controls…

    158 GitHub stars~739 tokensUpdated today
    Auto-check passed
  • App Control

    ad-repo/nullplayer

    Launch, configure, drive, screenshot and measure the running NullPlayer app.

    158 GitHub stars~9.4k tokensUpdated today
    Auto-check passed
  • Chromecast Casting

    ad-repo/nullplayer

    Google Cast Protocol v2, message framing, debugging, and test scripts.

    158 GitHub stars~4.6k tokensUpdated today
    Auto-check passed
  • Emby Integration

    ad-repo/nullplayer

    Emby API, authentication flow, rating scale, streaming, scrobbling, and video playback.

    158 GitHub stars~3k tokensUpdated today
    Auto-check passed
  • Live UI Testing

    ad-repo/nullplayer

    How to debug a defect that only exists on screen — instrument first, drive the app yourself, and measure what is actually drawn.

    158 GitHub stars~4.1k tokensUpdated today
    Auto-check passed

Questions about Visualizations

What does Visualizations do?

Index of NullPlayer's visualization systems. An agent skill from ad-repo/nullplayer. Visualizations is an agent skill from ad-repo/nullplayer. Index of NullPlayer's visualization systems.

How do I install Visualizations in Claude Code?

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

How do I install Visualizations in Codex?

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

Can I use Visualizations 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 visualizations -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/visualizations, .gemini/skills/visualizations, .github/skills/visualizations and .opencode/skills/visualizations in your project.

What does Visualizations need to run?

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

Does Visualizations 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 Visualizations 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 Visualizations use?

Visualizations 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 Visualizations use?

About 1.2k tokens (SKILL.md is roughly 5k 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 Visualizations?

Skills that share tags, products or a category with Visualizations: Visualize (openclaw/openclaw, 392k stars), Indexability (thedaviddias/Front-End-Checklist, 74k stars), Visual Style (calesthio/OpenMontage, 66k stars) and D3 Visualization (nexu-io/open-design, 100k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Visualizations?

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.