index.ts

import { Cli, Command } from 'clipanion'

class CommandHelp extends Command {
  @Command.Path()
  @Command.Path('--help')
  @Command.Path('-h')
  async execute() {
    this.context.stdout.write(this.cli.usage(null))
  }
}

const cli = Cli.from([
  CommandHelp
])

cli.runExit(process.argv.slice(2), {
  stdin: process.stdin,
  stdout: process.stdout,
  stderr: process.stderr,
})

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "strict": true,
    "esModuleInterop": true,
    "experimentalDecorators": true,
    "forceConsistentCasingInFileNames": true
  }
}