Hi there, Awesome Front-end developer.

You are using Jacket.

A starterkit with a sane default setup, a good starting structure and powerfull front-end tools to back you up.

What front-end tools are included?

Npm -- Jacket is an npm package. You can find the package here.
Gulp -- As a build tool, Jacket uses Gulp.
Sass -- Bourbon & Neat, h5bp normalize, autoprefixer and more.
Smacss and BEVM -- Structure is Smacss based and BEVM is encouraged.
Scss linting -- Scss linting lets you lint your scss code.
BrowserSync -- For crossdevice testing Jacket uses Browsersync.
Jade -- Jacket is set up with Jade as templating language.
Sassdoc -- Scss Mixins, functions and more are documented with Sassdoc.

What Gulp tasks can be run?

gulp help

The Help task displays all the gulp tasks.

gulp favicons

The Favicons task can generate your favicons with Realfavicongenerator.

gulp sass

The Sass task compiles your scss to css.
This task can do: Globbing, Autoprefixing, Sourcemaps, it includes a jsonImporter and sends a terminal notification when compilation fails.

gulp scss-lint

Based on the .scss-lint.yml the Scss-lint task will check if all the scss code you wrote respects the codig standards.

gulp jade

The Jade task wil compile all the Jade templates to html files in the dist folder.

gulp browser-sync

The Browser sync task will serve this index.html file at localhost:3000/ and it will watch the scss and jade files and refresh all the devices that are hooked up when these files change.

gulp sassdoc

This task can generate all the scss documentation used in Jacket.

gulp watch

This task watches all your files.

gulp

The default tasks executes a sequence of tasks, see the gulpfile.js.

Sassdoc?

You can find the doc here