ahmadawais/chartli
skills/chartli/SKILL.md
Install and use chartli to render terminal charts from numeric text files or stdin.
$ install --global
skillsauthnpx skillsauth add ahmadawais/chartli chartliInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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SKILL.md
- name:
- chartli
- description:
- Install and use chartli to render terminal charts from numeric text files or stdin.
chartli Skill
Use this skill when an agent needs to visualize numeric data in the terminal as ASCII/Unicode/SVG charts.
Install
npx skills add ahmadawais/chartli
CLI install/use
Instant use:
npx chartli --help
Global install:
npm i -g chartli
What chartli can do
- Render chart types:
ascii,spark,bars,columns,heatmap,unicode,braille,svg - Read from file path input
- Read from stdin when no file is passed
- Control output dimensions with
--widthand--height - Render SVG with
--mode circles|lines - Add
xandyaxis titles with--x-axis-labeland--y-axis-label - Add custom tick/category labels with
--x-labelsand--series-labels - Show raw values on the plotted data with
--data-labels - Promote the first numeric column into x-axis labels with
--first-column-x
Command templates
From file:
npx chartli <file> -t <type> [--width N] [--height N] [--mode circles|lines] [--x-axis-label LABEL] [--y-axis-label LABEL] [--x-labels a,b,c] [--series-labels foo,bar] [--data-labels] [--first-column-x]
From stdin:
printf 'x y\n1 10\n2 20\n3 15\n' | npx chartli -t ascii -w 24 -h 8
Labeled two-column chart:
printf 'day value\n1 10\n2 20\n3 15\n' | npx chartli -t ascii -w 24 -h 8 --first-column-x --data-labels
Per-type examples:
npx chartli data.txt -t ascii -w 24 -h 8
npx chartli data.txt -t spark
npx chartli data.txt -t bars -w 28
npx chartli data.txt -t columns -h 8
npx chartli data.txt -t heatmap
npx chartli data.txt -t unicode
npx chartli data.txt -t braille -w 16 -h 6
npx chartli data.txt -t svg -m lines -w 320 -h 120
Input format
Whitespace-separated numeric rows; optional header row is allowed.
day sales costs profit
1 10 8 2
2 14 9 5
3 12 11 3
When --first-column-x is set, the first numeric column becomes the x-axis labels. If a header row exists, chartli uses the first header cell as the x-axis title and the remaining headers as series labels. For common two-column input, the second header cell becomes the y-axis title.
Repository example assets
examples/assets/core-single-series.txtexamples/assets/core-multi-series.txtexamples/assets/image-data.txtexamples/assets/image-columns-variant.txt
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