Chart Image

Chart Image is a Data skill for Claude Code, published by zebbern in claude-code-guide.

4.6K stars459 forkson zebbern/claude-code-guideAdded 2026/08/16Repository updated 2026/08/15

aiai-agentai-agent-toolsanthropic-claudeclaudeclaude-aiclaude-apiclaude-codeclaude-code-communicationclaude-code-guideclaude-code-skillsclaude-commandsclaude-desktopclaude-mcpclaude-sonnetcodemcpmcp-agentsmcp-toolsvscode-extension

Install in seconds

Install Chart Image

Copy Chart Image into your Claude Code skills folder. Run the command in your terminal, or review the source on GitHub before installing.

terminal

npx degit https://github.com/zebbern/claude-code-guide/tree/main/skills/chart-image ~/.claude/skills/chart-image

Requires Node.js. Downloads this skill only — not the rest of the repository — into your Claude Code skills folder.

Without Node.js

git clone https://github.com/zebbern/claude-code-guide.git

Clones the whole repository, then copy the skill’s own directory into your skills folder yourself.

In this catalog

Source file: skills/chart-image/SKILL.md in zebbern/claude-code-guide
Installs to: ~/.claude/skills/chart-image
Collection: One of 25 skills cataloged from this repository
Category: Data — 668 skills

What Chart Image does

Chart Image generates PNG chart images from data, supporting line, bar, area, candlestick, pie, and heatmap charts. Use it when you need to visualize data, plot time series, or create charts for reports, alerts, or dashboards without a browser.

Chart Image is cataloged under Data on DirSkills. Chart Image comes from a repository tagged ai, ai-agent, ai-agent-tools, anthropic-claude and claude.

Documentation

README

Excerpt

Chart Image Generator

Generate PNG chart images from data using Vega-Lite. Perfect for headless server environments.

Why This Skill?

Built for Fly.io / VPS / Docker deployments:

✅ No native compilation - Uses Sharp with prebuilt binaries (unlike canvas which requires build tools)
✅ No Puppeteer/browser - Pure Node.js, no Chrome download, no headless browser overhead
✅ Lightweight - ~15MB total dependencies vs 400MB+ for Puppeteer-based solutions
✅ Fast cold starts - No browser spinup delay, generates charts in <500ms
✅ Works offline - No external API calls (unlike QuickChart.io)

Setup (one-time)

cd /data/clawd/skills/chart-image/scripts && npm install

Quick Usage

This is the opening of the README. Read the full README on GitHub.

Frequently asked about Chart Image

What else does zebbern publish alongside Chart Image?
Chart Image is one of 25 skills that DirSkills catalogs from zebbern/claude-code-guide, the repository it ships in. Its siblings there include API Fuzzing for Bug Bounty, API Shape Explorer and AWS Penetration Testing. Each one is a separate skill with its own page in this directory, installs the same way Chart Image does, and is maintained by zebbern in that same repository. The rest of the collection is listed on the zebbern/claude-code-guide page.
How does Chart Image compare to other Data skills?
Chart Image ranks #187 by stars among the 668 Data skills in this catalog. The most-starred ones next to it are Benchmark Methodology, Jupyter Notebook and Solana. DirSkills ranks by the star count of the repository each skill ships in, so that order reflects how popular those repositories are rather than any review of Chart Image against them. Open each page to compare what they document and how they install.