ascii-mini-charts

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"
"Generate sparkline / sparklines with ascii-mini-charts"
"Annotate min/max/current with ascii-mini-charts"

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 Chinese: ascii-mini-charts, sparklines, ASCII charts, bar chart, line chart, trend, normalization