{
  "name": "preview-code",
  "private": true,
  "devDependencies": {
    "css-slam": "^1.1.0",
    "del": "^2.2.1",
    "eslint-plugin-html": "^1.5.5",
    "gulp": "gulpjs/gulp#4.0",
    "gulp-eslint": "^3.0.1",
    "gulp-html-minifier": "^0.1.8",
    "gulp-if": "^2.0.1",
    "gulp-imagemin": "^3.0.1",
    "gulp-style-modules": "^0.1.0",
    "gulp-uglify": "^2.0.0",
    "merge-stream": "^1.0.0",
    "plylog": "^0.4.0",
    "polymer-build": "^0.4.1",
    "polyserve": "^0.16.0-prerelease.7"
  },
  "scripts": {
   "build": "node ./node_modules/gulp/bin/gulp.js",
   "serve": "node ./node_modules/polyserve/bin/polyserve -p 8080 --proxy-path api/v1 --proxy-target http://localhost:8443/ -P h2",
   "serve-build": "node ./node_modules/polyserve/bin/polyserve build/unbundled/ -p 8080 --proxy-path api/v1 --proxy-target http://localhost:8443/ -P h2"
  },
  "engines": {
    "node": ">=0.10.0"
  }
}

{
  "name": "preview-code",
  "private": true,
  "devDependencies": {
    "css-slam": "^1.1.0",
    "del": "^2.2.1",
    "eslint-plugin-html": "^1.5.5",
    "gulp": "gulpjs/gulp#4.0",
    "gulp-eslint": "^3.0.1",
    "gulp-html-minifier": "^0.1.8",
    "gulp-if": "^2.0.1",
    "gulp-imagemin": "^3.0.1",
    "gulp-style-modules": "^0.1.0",
    "gulp-uglify": "^2.0.0",
    "merge-stream": "^1.0.0",
    "plylog": "^0.4.0",
    "polymer-build": "^0.4.1",
    "polyserve": "^0.16.0-prerelease.9",
    "polymer-cli": "^0.17.0"
  },
  "scripts": {
   "build": "node ./node_modules/gulp/bin/gulp.js",
   "serve": "node ./node_modules/polyserve/bin/polyserve -p 8080 --proxy-path api/v1 --proxy-target http://localhost:8443/ -P h2",
   "serve-build": "node ./node_modules/polyserve/bin/polyserve build/unbundled/ -p 8080 --proxy-path api/v1 --proxy-target http://localhost:8443/ -P h2"
  },
  "engines": {
    "node": ">=0.10.0"
  }
}

Add polymer-cli to dev deps
Add polymer-cli to dev deps
