linter-api.js

// your-linter/index.js:
var jsl = require('jsl')
  , linter

var comma_first = require('jsl-comma-first-object')
  , no_semicolons = require('jsl-no-semicolon')
  , max_line_length = require('jsl-max-line-length')

module.exports = linter = jsl()

linter
  .addASTRule('error', comma_first.selector, comma_first)
  .addASTRule('error', no_semicolons.selector, no_semicolons)

linter
  .addLineRule('error', max_line_length(80))

// OR alternatively:

var one_var_per_var_block = require('jsl-one-var-per-decl');
var semicolons = require('jsl-require-semicolon');

linter
  .addASTRule('error', one_var_per_var_block.selector, one_var_per_var_block)
  .addASTRule('error', semicolons.selector, semicolons);


// now in your your-linter/bin/your-linter:
require('../index').cli()

// in your-other-module/test.js:
var test = require('tape')
  , lint = require('your-linter')

test('passes style guide', lint.test(path.join(__dirname, 'package.json')))