Claude-skill-registry commander

Name: commander
Author: majiayu000

Use when building CLI tools with Commander.js - commands, options, arguments, and help text for Node.js command-line applications

install

source · Clone the upstream repo

git clone https://github.com/majiayu000/claude-skill-registry

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/majiayu000/claude-skill-registry "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/data/commander" ~/.claude/skills/majiayu000-claude-skill-registry-commander && rm -rf "$T"

manifest: skills/data/commander/SKILL.md

Commander.js CLI Framework

Quick Start

import { Command } from 'commander';

const program = new Command();

program
  .name('mycli')
  .version('1.0.0')
  .description('My CLI tool');

program
  .command('build <input>')
  .description('Build the project')
  .option('-o, --output <file>', 'Output file', 'output.json')
  .option('-w, --watch', 'Watch mode')
  .option('-v, --verbose', 'Verbose output')
  .action((input, options) => {
    console.log(`Building ${input} to ${options.output}`);
    if (options.watch) startWatcher();
  });

program.parse();

Command Patterns

Pattern	Syntax	Description
Required arg	`<name>`	Must be provided
Optional arg	`[name]`	Can be omitted
Variadic	`<files...>`	Multiple values
Option value	`-o, --out <file>`	Option with value
Boolean flag	`-v, --verbose`	True when present
Negatable	`--no-cache`	Sets cache=false

Subcommands

const build = program.command('build');

build
  .command('dev')
  .description('Development build')
  .action(() => { /* ... */ });

build
  .command('prod')
  .description('Production build')
  .action(() => { /* ... */ });

Key Features

// Default values
.option('-p, --port <number>', 'Port', '3000')

// Coercion
.option('-n, --number <n>', 'A number', parseInt)

// Required options
.requiredOption('-c, --config <path>', 'Config file')

// Choices
.option('-e, --env <env>', 'Environment').choices(['dev', 'prod'])

// Error handling
program.exitOverride(); // Throw instead of process.exit
program.configureOutput({ writeErr: (str) => logger.error(str) });

Tips

Use
```
program.parse()
```
at the end, or
```
program.parseAsync()
```
for async
Access args via action callback or
```
program.args
```
Use
```
.alias('b')
```
for command shortcuts

Add examples with

.addHelpText('after', 'Examples:\n  $ mycli build src/')