charting-vega-lite SKILL.md skillA
charting-vega-lite from oaustegard/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add oaustegard/claude-skills/charting-vega-lite@v0.1.0Pins v0.1.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- oaustegard/claude-skills
- Path
plugins/data-and-visualization/skills/charting-vega-lite/SKILL.md- Versions recorded
- 1
- Latest version
- v0.1.0, committed Jul 7, 2026
- Size
- 8,416 bytes
- Repository stars
- 158
- License
- MIT
Create interactive data visualizations using Vega-Lite declarative JSON grammar. Supports 20+ chart types (bar, line, scatter, histogram, boxplot, grouped/stacked variations, etc.) via templates and programmatic builders. Use when users upload data for charting, request specific chart types, or mention visualizations. Produces portable JSON specs with inline data islands that work in Claude artifacts and can be adapted for production.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
## Overview
This skill creates interactive Vega-Lite visualizations from uploaded data. The workflow:
1. Analyze data structure and context
2. Select 5-10 meaningful chart types based on what the data represents
3. Build chart specifications programmatically
4. Generate React artifact with embedded visualizations
## Critical Technical Constraint: Inline Data Island
**Claude artifacts cannot use fetch() for computer:// URLs.**
All data must be embedded as an inline JavaScript constant:
```javascript
const DATA = [ /* embedded data array */ ];
// Later in chart specs:
spec.data = { values: DATA };
```
**DO NOT:**
- Use fetch() to load external files
- Reference external data URLs
- Create separate data files
This is the only pattern that works in Claude's artifact environment.
## Primary Workflow: Data Upload → Chart Explorer
Execute this sequence when user uploads data without specifying chart type:
### 1. Analyze Data Structure
```bash
python /mnt/skills/user/charting-vega-lite/scripts/analyze_data.py /mnt/user-data/uploads/<filename>
```
**Extract from output:**
- `fields[]` (with types and statistics)
- `suggested_charts[]` (suggested chart types with encodings)
…Read the whole file at its exact version.
How to install
mdr add oaustegard/claude-skills/charting-vega-lite@sha256:f7480f0dad4fddb1The line at the top of this page pins the label v0.1.0, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_7ntkfsywpdpd56km)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 7, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8416 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
oaustegard/claude-skills · 158 stars · license MIT · pushed 2026-11-07 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7ntkfsywpdpd56km GET https://markdownregistry.com/api/v1/resolve?ref=oaustegard/claude-skills/charting-vega-lite GET https://markdownregistry.com/api/v1/blob/f7480f0dad4fddb1a0cc9a60e2781799d2b9d968a17b20e91482abd3112e4402
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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