chartli
Install and use chartli to render terminal charts from numeric text files or stdin.
What this skill does
# chartli Skill Use this skill when an agent needs to visualize numeric data in the terminal as ASCII/Unicode/SVG charts. ## Install ```sh npx skills add ahmadawais/chartli ``` ## CLI install/use Instant use: ```sh npx chartli --help ``` Global install: ```sh 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: ```sh 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: ```sh printf 'x y\n1 10\n2 20\n3 15\n' | npx chartli -t ascii -w 24 -h 8 ``` Labeled two-column chart: ```sh 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: ```sh 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. ```text 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`
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