Agent skills
generate-qr-code-natively

Agent skill

generate-qr-code-natively

Generate QR codes locally without external APIs using native CLI and runtime libraries in Bash and Node.js.

View SKILL.md on GitHub Repository

Stars 106

Forks 20

Install this agent skill to your Project

npx add-skill https://github.com/besoeasy/open-skills/tree/main/skills/generate-qr-code-natively

SKILL.md

Generate QR Code Natively

Create QR codes fully offline on the local machine (no third-party QR API calls).

When to use

User asks to generate a QR code from text, URL, wallet address, or payload
Privacy-sensitive workflows where data should stay local
Fast automation pipelines that should not depend on external services

Required tools / APIs

No external API required
Bash CLI option: qrencode
Node.js option: qrcode package

Install options:

bash

# Ubuntu/Debian
sudo apt-get update && sudo apt-get install -y qrencode

# Node.js
npm install qrcode

Skills

generate_qr_with_bash

Generate PNG and terminal QR directly from shell.

bash

# Encode text into PNG
DATA="https://example.com/report?id=123"
qrencode -o qrcode.png -s 8 -m 2 "$DATA"

# Print QR in terminal (UTF-8 block mode)
qrencode -t UTF8 "$DATA"

# SVG output
qrencode -t SVG -o qrcode.svg "$DATA"

generate_qr_with_nodejs

javascript

import QRCode from 'qrcode';

const data = process.argv[2] || 'https://example.com';

async function main() {
  await QRCode.toFile('qrcode.png', data, {
    errorCorrectionLevel: 'M',
    margin: 2,
    width: 512
  });

  const svg = await QRCode.toString(data, { type: 'svg', margin: 2 });
  await import('node:fs/promises').then(fs => fs.writeFile('qrcode.svg', svg));

  const terminal = await QRCode.toString(data, { type: 'terminal' });
  console.log(terminal);
  console.log('Saved: qrcode.png, qrcode.svg');
}

main().catch(err => {
  console.error('QR generation failed:', err.message);
  process.exit(1);
});

Run:

bash

node generate-qr.js "https://example.com/invoice/abc"

Agent prompt

text

You are generating QR codes locally without calling external QR APIs.
Use Bash (qrencode) for quick CLI generation or Node.js (qrcode package) for programmatic control.
Return:
1) command/code used,
2) output filenames (png/svg),
3) brief validation note (e.g., "scan test recommended").
If dependency is missing, provide the install command and retry.

Best practices

Keep payload concise for better scan reliability
Use at least error correction level M for general use
Export PNG for compatibility and SVG for scalable print/web usage
Validate with a scanner after generation

Troubleshooting

qrencode: command not found → install qrencode via package manager
Node import error → ensure npm install qrcode completed
Dense/unclear QR image → increase image size/box size and reduce payload length

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