A toolkit for building interactive charts and dashboards with Apache ECharts, a JavaScript library for displaying data. It can produce code for HTML, JavaScript, React, or Vue.

Use it to create charts such as line, bar, pie, scatter, heatmap, treemap, and radar visualizations.

It removes the need to design chart behavior and accessibility details from scratch.

echart — Skill for Claude Code by nealepetrillo/claude-skills-echart

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 nealepetrillo/claude-skills-echart --skill echart

Clone the repo

git clone --depth 1 https://github.com/nealepetrillo/claude-skills-echart

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/nealepetrillo/claude-skills-echart/echart/github.svg)](https://agentmods.dev/skills/nealepetrillo/claude-skills-echart/echart)

Your own site

<a href="https://agentmods.dev/skills/nealepetrillo/claude-skills-echart/echart"><img src="https://agentmods.dev/badge/skills/nealepetrillo/claude-skills-echart/echart/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/nealepetrillo/claude-skills-echart/echart"><img src="https://agentmods.dev/badge/skills/nealepetrillo/claude-skills-echart/echart.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 76 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 1,852 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.

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.

Model	Per session	Once invoked
Fable 5.1	$0.00076	$0.01852
Opus 5.5	$0.00030	$0.00741
Sonnet 5.5	$0.00015	$0.00370
Haiku 4.5	$0.00008	$0.00185

Measured 2mo ago against content hash 5630f043d70e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

echart 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 2mo ago.

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.

.claude/skills/echart/SKILL.md · 224 lines

How it starts

The opening of the file, as written. The whole thing — 224 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ECharts v6 Visualization Skill

Create professional, accessible data visualizations using Apache ECharts v6.

Version: ECharts 6.x | Download: https://github.com/apache/echarts/releases

Design guidelines (color palettes, chart selection, accessibility): see references/design-principles.md
Detailed code examples (all chart types): see references/chart-examples.md

Installation

Download from GitHub releases: https://github.com/apache/echarts/releases

Files to download:

echarts.min.js - Full minified build (recommended)
echarts.js - Full unminified build (for debugging)

Place the file in your project (e.g., ./lib/echarts.min.js or ./vendor/echarts.min.js).

Core Pattern

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <script src="./lib/echarts.min.js"></script>
</head>
<body>
  <div id="chart" style="width: 800px; height: 500px;"></div>
  <script>
    const chart = echarts.init(document.getElementById('chart'));
    const option = {
      // Configuration goes here
    };
    chart.setOption(option);
    window.addEventListener('resize', () => chart.resize());
  </script>
</body>
</html>

CDN (Only if explicitly requested)

<script src="https://cdn.jsdelivr.net/npm/echarts@6/dist/echarts.min.js"></script>

Option Structure

The option object is the heart of ECharts configuration:

const option = {
  title: { text: 'Chart Title', subtext: 'Subtitle', left: 'center' },
  tooltip: { trigger: 'axis' }, // or 'item' for pie/scatter
  legend: { data: ['Series 1', 'Series 2'], top: 'bottom' },
  grid: { left: '10%', right: '10%', bottom: '15%', containLabel: true },
  xAxis: { type: 'category', data: ['A', 'B', 'C'] },
  yAxis: { type: 'value' },
  series: [
    { name: 'Series 1', type: 'bar', data: [10, 20, 30] }
  ],
  toolbox: { feature: { saveAsImage: {}, dataZoom: {} } },
  dataZoom: [{ type: 'slider', start: 0, end: 100 }],
  color: ['#4477AA', '#EE6677', '#228833', '#CCBB44', '#66CCEE', '#AA3377'] // Paul Tol Bright
};

Read the full file on GitHub · 224 lines

Files

What ships with it

2 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.

2mo ago First seen · 224 lines · 76 tokens per session scan A 5630f043d70e

Subscribe to this mod's changes

echart is a skill published in the GitHub repository nealepetrillo/claude-skills-echart (4 stars, last pushed 8mo ago), licensed MIT. It adds 76 tokens to every session and 1,852 once invoked, about $0.0003 per session on Opus 5.5. 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 2026-08-31.

Analytics and metrics Frontend

echart next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
echartnealepetrillo/claude-skills-echart	Skill	4	8mo ago	MIT	A	76	Claude Code
imagegenopenai/codex	Skill	134k	today	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	today	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	today	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	314k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code