teachingai/ascii-mini-charts
skills/ascii-skills/ascii-mini-charts/SKILL.md
Generate ASCII mini charts (sparkline/bar/simple line) for plain-text trend inspection, with minimal and annotated variants and normalization notes. Use when the user needs text-based data visualization, terminal charts, or ASCII graphs for CLI output.
$ install --global
skillsauthnpx skillsauth add teachingai/agent-skills ascii-mini-chartsInstall this skill globally with one command. Works with Claude Code, Cursor, and Windsurf.
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Last scanned: Apr 10, 2026, 8:43 AM5.0s4 files scanned
SKILL.md
- name:
- ascii-mini-charts
- description:
- Generate ASCII mini charts (sparkline/bar/simple line) for plain-text trend inspection, with minimal and annotated variants and normalization notes. Use when the user needs text-based data visualization, terminal charts, or ASCII graphs for CLI output.
- license:
- Complete terms in LICENSE.txt
When to use this skill
CRITICAL TRIGGER RULE
- Use this skill ONLY when the user explicitly mentions the exact skill name:
ascii-mini-charts.
Trigger phrases include:
- "ascii-mini-charts"
- "use ascii-mini-charts"
- "用 ascii-mini-charts 生成 sparkline / 火花线"
- "使用 ascii-mini-charts 标注 min/max/current"
Boundary
- No statistical inference. Visualization only.
- Default output is ASCII-only. Unicode blocks are optional and MUST include an ASCII-only fallback.
- Default output width should stay <= 60 columns. For longer series, provide a compression strategy (sampling/bucketing).
How to use this skill
Inputs
- series (required numeric list)
- type (sparkline | bar | line, default sparkline)
- width (default min(len(series), 30))
- height (default 10 for bar/line)
- normalize (linear | log, default linear)
- showLabels (default true)
Outputs (required)
- chartMinimal
- chartAnnotated (with min/max/current)
- scaleNotes (normalization + outlier strategy)
Inline Example
Input: series=[3, 7, 2, 9, 5, 8, 1, 6], type=sparkline:
chartMinimal:
▂▅▁▇▃▆ ▄
chartAnnotated:
▂▅▁▇▃▆ ▄ min:1 max:9 current:6
Input: series=[10, 25, 15, 30], type=bar, height=5:
chartAnnotated:
##
## ##
## ##
## ## ##
## ## ## ##
10 25 15 30
Script Usage
# Generate sparkline from JSON data
echo '{"series": [3, 7, 2, 9, 5, 8, 1, 6], "type": "sparkline"}' | python3 scripts/mini_charts.py
# Generate bar chart with annotations
echo '{"series": [10, 25, 15, 30], "type": "bar", "height": 5, "showLabels": true}' | python3 scripts/mini_charts.py
Script
scripts/mini_charts.py: generate ASCII mini charts from JSON stdin
Examples
examples/sparkline.md
Quality checklist
- Trend is clear; labels are short and non-spammy
- ASCII-only output copy/pastes cleanly
- Provide a compression strategy for long series
Keywords
English: ascii-mini-charts, sparkline, ascii chart, bar chart, line chart, trend, normalize 中文: ascii-mini-charts, 火花线, ASCII 图表, 柱状图, 折线图, 趋势, 归一化
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