datavis

datavis is a skill for Claude Code, Codex from foryourhealth111-pixel/Vibe-Skills. It costs 106 tokens per session (1,180 once invoked), scanned A, original, Apache-2.0.

A toolkit for making charts and other data-driven visuals with D3.js, Chart.js, and SVG. It covers how to represent values with scales, colors, shapes, and accessible design.

In plain words
What is it for?
It is for building interactive charts, selecting linear, logarithmic, square-root, and time scales, and designing categorical, sequential, and diverging color palettes. It includes examples of mathematically accurate visual encoding.
Why use it?
It helps turn datasets into visuals that show patterns without exaggerating differences or confusing viewers. It also provides guidance for choosing suitable chart encodings.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for building interactive charts, selecting linear, logarithmic, square-root, and time scales, and designing categorical, sequential, and diverging color palettes. It includes examples of mathematically accurate visual encoding.

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Install with agentmods
npx agentmods add skills/foryourhealth111-pixel/vibe-skills/datavis
About the project

Vibe-Skills is a collection and routing system that helps AI agents discover, select, and coordinate specialized skills for completing tasks. It is intended for agents that need to organize workflows across many installed capabilities. The catalogue entries are skills and an agent belonging to this system.

foryourhealth111-pixel/Vibe-Skills · 3,252 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add foryourhealth111-pixel/Vibe-Skills --skill datavis
Clone the repo
git clone --depth 1 https://github.com/foryourhealth111-pixel/Vibe-Skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for datavis

README.md
[![agentmods](https://agentmods.dev/badge/skills/foryourhealth111-pixel/vibe-skills/datavis/github.svg)](https://agentmods.dev/skills/foryourhealth111-pixel/vibe-skills/datavis)
Your own site
<a href="https://agentmods.dev/skills/foryourhealth111-pixel/vibe-skills/datavis"><img src="https://agentmods.dev/badge/skills/foryourhealth111-pixel/vibe-skills/datavis/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for datavis

Your own site · 80×15
<a href="https://agentmods.dev/skills/foryourhealth111-pixel/vibe-skills/datavis"><img src="https://agentmods.dev/badge/skills/foryourhealth111-pixel/vibe-skills/datavis.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 106 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,180 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00106 $0.01180
Opus 5 $0.00053 $0.00590
Sonnet 5 $0.00021 $0.00236
Haiku 4.5 $0.00011 $0.00118

Measured 13d ago against content hash d6f3a480f289, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

datavis scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 13d ago.

The scan reads SKILL.md. This mod also ships 3 executable files (scripts/analyze-distribution.py, scripts/color-palette.py, scripts/d3-scaffold.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

bundled/skills/datavis/SKILL.md · 154 lines

How it starts

The opening of the file, as written. The whole thing — 154 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Data Visualization Skill

Create beautiful, mathematically elegant, emotionally resonant data visualizations.

Philosophy: "Life is Beautiful"

Every visualization should:

  1. Reveal truth through data
  2. Evoke wonder through design
  3. Respect the viewer through accessibility
  4. Honor complexity through elegant simplification

Core Capabilities

1. Visual Encoding

Scale Selection:

Scale Use When Example
Linear Evenly distributed data Temperature
Log Multiple orders of magnitude Population (100 to 1B)
Sqrt Encoding area (circles) Bubble chart radius
Time Temporal data Dates

Perceptual Honesty - Area scales with square of radius, so use sqrt:

// WRONG: Linear radius exaggerates large values
const badScale = d3.scaleLinear().domain([0, max]).range([0, maxRadius]);

// RIGHT: Sqrt maintains perceptual accuracy
const goodScale = d3.scaleSqrt().domain([0, max]).range([0, maxRadius]);

2. Color Design

Palette Types:

  • Categorical - Distinct hues for nominal data (max 8)
  • Sequential - Single hue gradient for ordered data
  • Diverging - Two hues meeting at meaningful midpoint

Colorblind-Safe Palette (8 colors):

const colorblindSafe = [
  '#332288', '#117733', '#44AA99', '#88CCEE',
  '#DDCC77', '#CC6677', '#AA4499', '#882255'
];

Always use redundant encoding - don't rely on color alone:

node.attr('fill', d => colorScale(d.category))
    .attr('d', d => symbolScale(d.category)); // Shape too!

3. D3.js Patterns

Force Simulation:

const simulation = d3.forceSimulation(nodes)
  .force('charge', d3.forceManyBody().strength(-300))
  .force('link', d3.forceLink(links).id(d => d.id))
  .force('center', d3.forceCenter(width/2, height/2))
  .force('collision', d3.forceCollide().radius(d => d.r + 2));

Responsive SVG:

const svg = d3.select('#chart')
  .append('svg')
  .attr('viewBox', `0 0 ${width} ${height}`)
  .attr('preserveAspectRatio', 'xMidYMid meet');

Read the full file on GitHub · 154 lines

Files

What ships with it

3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 13d ago First seen · 154 lines · 106 tokens per session scan A d6f3a480f289

Subscribe to this mod's changes

datavis is a skill published in the GitHub repository foryourhealth111-pixel/Vibe-Skills (3,252 stars, last pushed 12d ago), licensed Apache-2.0. It adds 106 tokens to every session and 1,180 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.