Agent skill
npm-trends
Fetch and compare npm package download statistics with trend analysis. Use when the user asks about npm trends, package popularity, download counts, growth rates, or wants to compare npm packages over time.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/other/npm-trends
SKILL.md
npm Trends
Fetch and compare download statistics for npm packages using the official npm registry API.
Usage
<your-skill-directory>/npm-trends/scripts/npm_trends.ts <package1> [package2] ... [options]
Options
| Option | Description |
|---|---|
--period |
Time period: last-day, last-week, last-month, last-year. Default: last-month |
--range |
Custom date range: YYYY-MM-DD:YYYY-MM-DD (overrides --period) |
--daily |
Show daily breakdown (with --range) |
--trends |
Show weekly trends with growth analysis and ASCII chart |
--weeks |
Number of weeks for trend analysis (default: 12, max: 52) |
Examples
Compare packages (last month totals):
<your-skill-directory>/npm-trends/scripts/npm_trends.ts skills add-skill
Weekly trend analysis (recommended for comparison):
<your-skill-directory>/npm-trends/scripts/npm_trends.ts skills add-skill --trends
Extended trend analysis (6 months):
<your-skill-directory>/npm-trends/scripts/npm_trends.ts react vue --trends --weeks 26
Custom date range:
<your-skill-directory>/npm-trends/scripts/npm_trends.ts express fastify --range 2025-01-01:2025-01-25
Output
Basic mode
- Total downloads and daily average
- Comparison ranking with bar chart
Trends mode (--trends)
- Weekly download totals
- Growth rate (overall and recent 4 weeks)
- Momentum indicator (📈 accelerating, ➡️ steady, 📉 decelerating)
- ASCII chart showing weekly downloads
- Crossover analysis (when comparing 2 packages)
- Gap analysis showing which package is gaining ground
API Reference
Uses the official npm downloads API:
- Point:
https://api.npmjs.org/downloads/point/{period}/{package} - Range:
https://api.npmjs.org/downloads/range/{start:end}/{package}
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