diff --git a/bin/semantic-release.js b/bin/semantic-release.js
new file mode 100755
index 00000000..edcd96a3
--- /dev/null
+++ b/bin/semantic-release.js
@@ -0,0 +1,13 @@
+#!/usr/bin/env node
+
+/* istanbul ignore next */
+try {
+  require('../dist')
+} catch (err) {
+  if (err.code === 'MODULE_NOT_FOUND') {
+    require('babel/register')
+    require('../src')
+  } else {
+    console.log(err)
+  }
+}
diff --git a/package.json b/package.json
index 4a1cdc1f..39bd963e 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,8 @@
   "dependencies": {
     "@semantic-release/commit-analyzer": "^1.0.0",
     "@semantic-release/release-notes-generator": "^1.0.0",
+    "lodash": "^3.9.3",
+    "nopt": "^3.0.3",
     "npm-registry-client": "^6.4.0",
     "npmconf": "^2.1.2",
     "npmlog": "^1.2.1",
diff --git a/src/index.js b/src/index.js
new file mode 100644
index 00000000..877a1cc1
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,93 @@
+const { readFileSync, writeFileSync } = require('fs')
+
+const _ = require('lodash')
+const log = require('npmlog')
+const nopt = require('nopt')
+const npmconf = require('npmconf')
+
+const env = process.env
+const options = _.defaults(nopt({
+  debug: Boolean,
+  'github-token': String,
+  'github-url': String
+}, {
+  token: 'github-token',
+  dry: 'debug'
+}), {
+  debug: !env.CI,
+  'github-token': env.GH_TOKEN || env.GITHUB_TOKEN,
+  'github-url': env.GH_URL
+})
+const PREFIX = 'semantic-release'
+
+const pkg = JSON.parse(readFileSync('./package.json'))
+const plugins = require('./lib/plugins')(pkg.release || {})
+
+npmconf.load({}, (err, conf) => {
+  if (err) {
+    log.error(PREFIX, 'Failed to load npm config.', err)
+    process.exit(1)
+  }
+
+  log.level = conf.get('loglevel')
+
+  log.verbose(PREFIX, 'Verifying pkg, options and env.')
+
+  const errors = require('./lib/verify')(pkg, options, env)
+  errors.forEach((err) => log.error(PREFIX, `${err.message} ${err.code}`))
+  if (errors.length) process.exit(1)
+
+  if (!options.argv.cooked.length || options.argv.cooked[0] === 'pre') {
+    log.verbose(PREFIX, 'Running pre-script.')
+
+    const registry = conf.get('registry')
+    const nerfDart = require('./lib/nerf-dart')(registry)
+
+    if (env.NPM_TOKEN) {
+      conf.set(`${nerfDart}:_authToken`, '${NPM_TOKEN}', 'project')
+    } else {
+      // Using the old auth token format is not considered part of the public API
+      // This might go away anytime (i.e. when we have a better testing strategy)
+      conf.set('_auth', '${NPM_OLD_TOKEN}', 'project')
+      conf.set('email', '${NPM_EMAIL}', 'project')
+    }
+
+    conf.save('project', (err) => {
+      if (err) return log.error(PREFIX, 'Failed to save npm config.', err)
+
+      log.verbose(PREFIX, 'Wrote authToken to .npmrc.')
+
+      require('./pre')(pkg, {
+        auth: {
+          token: env.NPM_TOKEN
+        },
+        loglevel: log.level,
+        registry
+      },
+      plugins,
+      (err, release) => {
+        if (err) {
+          log.error(PREFIX, 'Failed to determine new version.')
+
+          const args = [PREFIX, (err.code ? `${err.code} ` : '') + err.message]
+          if (err.stack) args.push(err.stack)
+          log.error(...args)
+          process.exit(1)
+        }
+
+        log.verbose(PREFIX, `Determined version ${release.version}.`, release)
+
+        writeFileSync('./package.json', JSON.stringify(_.assign(pkg, {
+          version: release.version
+        }), null, 2))
+
+        log.info(PREFIX, `Wrote version ${release.version} to package.json.`)
+      })
+    })
+  } else if (options.argv.cooked[0] === 'post') {
+    log.verbose(PREFIX, 'Running post-script.')
+
+  } else {
+    log.error(PREFIX, `Command "${options.argv.cooked[0]}" not recognized. User either "pre" or "post"`)
+  }
+})