Chart Data Extractor

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name: chart-data-extractor
description: "Extract pixel-level data from an image of a chart or graph and produce a structured data table. Use when asked to extract data from a chart image, transcribe numbers from a graph, digitise a chart, or turn a screenshot of data into a table. Produces a structured table with extracted values, confidence levels, and a reconstructed chart source. Best used with Claude Opus 4.7 or newer for reliable chart data extraction."
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# Chart Data Extractor Skill

Extracts data from images of charts and graphs — bar charts, line charts, pie charts, scatter plots, and tables in images — producing a structured data table that can be used in spreadsheets or rebuilt in any charting tool. Built to leverage Opus 4.7 pixel-level image analysis capabilities.

## Required Inputs

Ask the user for these if not provided:
- **The chart image** (upload a screenshot or image file)
- **Chart type** (if ambiguous — bar / line / pie / scatter / other)
- **What matters most** (approximate trends / precise values / specific data points / categorisation)
- **Known axis values** (optional — if the user knows the max/min values to anchor the extraction)

## Output Structure

### 1. Chart Identification

| Attribute | Value |
|---|---|
| Chart type | [Bar / Line / Pie / Scatter / Area / Other] |
| Chart title (if visible) | [Title text] |… load the full skill through Skill Me