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chartli

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Install and use chartli to render terminal charts from numeric text files or stdin.

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How to use this skill

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  2. Copy the prompt below and paste it into your agent.
  3. Review the proposed files and risks before you approve installation.
Prompt to paste
I want to install this Agent Skill for this project in Codex.

Source SKILL.md: https://github.com/ahmadawais/chartli/blob/HEAD/skills/chartli/SKILL.md

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First, summarize what it does, its dependencies, license status if identifiable, and any risks. Show the exact files you propose to add under .agents/skills/chartli/. Do not write files or run scripts until I approve.

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Copying this prompt does not install or run the skill. Review third-party files before use. Codex skill guide

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 --width and --height
  • Render SVG with --mode circles|lines
  • Add x and y axis titles with --x-axis-label and --y-axis-label
  • Add custom tick/category labels with --x-labels and --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.txt
  • examples/assets/core-multi-series.txt
  • examples/assets/image-data.txt
  • examples/assets/image-columns-variant.txt