chart-data-extractor

Installation
SKILL.md

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]
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Installs
3
GitHub Stars
322
First Seen
14 days ago