# chunqiuyiyu/ervy

Bring charts to terminal.

Repository: https://github.com/chunqiuyiyu/ervy
Canonical: https://ross.abutalabs.com/products/ervy
Homepage: https://www.chunqiuyiyu.com/ervy/
Language: JavaScript
License: MIT
License Family: permissive
Topics: data-visualization, cli, terminal, console, chart, ascii, blog
Last push: 2023-08-27T11:51:00+00:00

## Health v2 (maintenance only)
Score: 32/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 2874, "days_push": 1102, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1605, forks 44 (observed 2026-08-28T04:05:10.361136+00:00)

## What it is
Ervy is a small JavaScript library for rendering ASCII charts (bar, pie, bullet, donut, gauge, scatter) directly in the terminal. It provides a simple API for colored terminal output and can also be used as a CLI tool.

## Use cases
- render bar charts in the terminal
- draw pie and donut charts as ASCII art
- visualize data in a CLI script
- add colored terminal output to Node.js apps
- display gauge or bullet charts in console dashboards

## When to choose
- you need lightweight, dependency-free ASCII charts in a Node.js terminal app
- you want quick console-based data visualization without a GUI
- you enjoy terminal/ASCII aesthetics for CLI output

## When to avoid
- you need interactive or high-resolution graphical charts
- you need a web-based charting solution
- you require a library with frequent updates or extensive chart types

## Facets
- artifact type: library
- maturity: maintenance
- function: data-visualization, cli
- domain: data-visualization, developer-tools
- platform: cli, cross-platform
- tags: ascii-art, terminal-charts, console, bar-chart, pie-chart, gauge, scatter-plot, command-line, nodejs

## Member repositories
- chunqiuyiyu/ervy (main) score 32

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:10.361136+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:52:16.372330+00:00, confidence not recorded.
  - readme: https://github.com/chunqiuyiyu/ervy (fetched 2026-08-28T04:05:10.361136+00:00, sha 60d331a24ecd)
  - homepage: https://www.chunqiuyiyu.com/ervy/ (fetched 2026-08-29T11:24:13.000495+00:00, sha 5bbfb02f00ec)
  - registry_npm: https://registry.npmjs.org/ervy (fetched 2026-08-29T11:24:13.010052+00:00, sha 98bcfa2b4c55)
- Data as of 2026-08-30T08:39:29.467469+00:00.