diff --git a/.editorconfig b/.editorconfig
index 21f03ed..e271f67 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -1,6 +1,6 @@
 # WordPress Coding Standards
 # https://make.wordpress.org/core/handbook/coding-standards/
-	
+
 root = true
 
 [*]
diff --git a/.stylelintrc b/.stylelintrc
new file mode 100644
index 0000000..58c6190
--- /dev/null
+++ b/.stylelintrc
@@ -0,0 +1,3 @@
+{
+  "extends": "stylelint-config-wordpress"
+}
diff --git a/check-diff.sh b/check-diff.sh
index 2ed1935..dbd84c0 100755
--- a/check-diff.sh
+++ b/check-diff.sh
@@ -173,6 +173,15 @@ function set_environment_variables {
 		ESLINT_IGNORE="$( upsearch .eslintignore )"
 	fi
 
+	if [ -z "$STYLELINT_CONFIG" ]; then
+		for SEARCHED_STYLELINT_CONFIG in .stylelintrc{,.yaml,.yml,.js,.json} stylelint.config.js; do
+			STYLELINT_CONFIG="$( upsearch $SEARCHED_STYLELINT_CONFIG )"
+			if [ ! -z "$STYLELINT_CONFIG" ]; then
+				break
+			fi
+		done
+	fi
+
 	# Load any environment variable overrides from config files
 	ENV_FILE=$( upsearch .ci-env.sh )
 	if [ ! -z "$ENV_FILE" ]; then
@@ -252,7 +261,7 @@ function set_environment_variables {
 
 	cat "$TEMP_DIRECTORY/paths-scope" | grep -E '\.php(:|$)' | cat - > "$TEMP_DIRECTORY/paths-scope-php"
 	cat "$TEMP_DIRECTORY/paths-scope" | grep -E '\.jsx?(:|$)' | cat - > "$TEMP_DIRECTORY/paths-scope-js"
-	cat "$TEMP_DIRECTORY/paths-scope" | grep -E '\.(css|scss)(:|$)' | cat - > "$TEMP_DIRECTORY/paths-scope-scss"
+	cat "$TEMP_DIRECTORY/paths-scope" | grep -E '\.css(:|$)' | cat - > "$TEMP_DIRECTORY/paths-scope-css"
 	cat "$TEMP_DIRECTORY/paths-scope" | grep -E '\.(xml|svg|xml.dist)(:|$)' | cat - > "$TEMP_DIRECTORY/paths-scope-xml"
 
 	# Gather the proper states of files to run through linting (this won't apply to phpunit)
@@ -290,7 +299,7 @@ function set_environment_variables {
 		done
 
 		# Make sure linter configs get copied linting directory since upsearch is relative.
-		for linter_file in .jshintrc .jshintignore .jscsrc .jscs.json .eslintignore .eslintrc phpcs.xml phpcs.xml.dist phpcs.ruleset.xml ruleset.xml; do
+		for linter_file in .jshintrc .jshintignore .jscsrc .jscs.json .eslintignore .eslintrc .stylelintrc{,.yaml,.yml,.js,.json} stylelint.config.js phpcs.xml phpcs.xml.dist phpcs.ruleset.xml ruleset.xml; do
 			if git ls-files "$linter_file" --error-unmatch > /dev/null 2>&1; then
 				if [ -L $linter_file ]; then
 					ln -fs $(git show :"$linter_file") "$LINTING_DIRECTORY/$linter_file"
@@ -470,6 +479,18 @@ function install_tools {
 			fi
 		fi
 
+		# Install stylelint
+		if [ -n "$STYLELINT_CONFIG" ] && [ -e "$STYLELINT_CONFIG" ] && [ ! -e "$(npm bin)/stylelint" ] && check_should_execute 'stylelint'; then
+			echo "Installing stylelint"
+			if ! npm install -g stylelint 2>/dev/null; then
+				echo "Failed to install stylelint (try manually doing: sudo npm install -g stylelint), so skipping stylelint"
+				DEV_LIB_SKIP="$DEV_LIB_SKIP,stylelint"
+			elif ! -e node_modules/stylelint-formatter-compact; then
+				echo "The stylelint-formatter-compact node module is not installed, skipping stylelint."
+				DEV_LIB_SKIP="$DEV_LIB_SKIP,stylelint"
+			fi
+		fi
+
 		# YUI Compressor
 		if [ "$YUI_COMPRESSOR_CHECK" == 1 ] && command -v java >/dev/null 2>&1 && check_should_execute 'yuicompressor'; then
 			if [ ! -e "$YUI_COMPRESSOR_PATH" ]; then
@@ -783,6 +804,35 @@ function lint_js_files {
 	fi
 }
 
+
+function lint_css_files {
+	if [ ! -s "$TEMP_DIRECTORY/paths-scope-css" ]; then
+		return
+	fi
+
+	set -e
+
+	# Run stylelint.
+	if [ -n "$STYLELINT_CONFIG" ] && [ -e "$STYLELINT_CONFIG" ] && [ -e "$(npm bin)/stylelint" ] && check_should_execute 'stylelint'; then
+		(
+			echo "## stylelint"
+			cd "$LINTING_DIRECTORY"
+			if ! cat "$TEMP_DIRECTORY/paths-scope-css" | remove_diff_range | xargs "$(npm bin)/stylelint" --custom-formatter=node_modules/stylelint-formatter-compact --config="$STYLELINT_CONFIG" > "$TEMP_DIRECTORY/stylelint-report"; then
+				if [ "$CHECK_SCOPE" == 'patches' ]; then
+					cat "$TEMP_DIRECTORY/stylelint-report" | php "$DEV_LIB_PATH/diff-tools/filter-report-for-patch-ranges.php" "$TEMP_DIRECTORY/paths-scope-css" | cut -c$( expr ${#LINTING_DIRECTORY} + 2 )-
+					exit_code="${PIPESTATUS[1]}"
+					if [[ $exit_code != 0 ]]; then
+						return $exit_code
+					fi
+				elif [ -s "$TEMP_DIRECTORY/stylelint-report" ]; then
+					cat "$TEMP_DIRECTORY/stylelint-report" | cut -c$( expr ${#LINTING_DIRECTORY} + 2 )-
+					exit 1
+				fi
+			fi
+		)
+	fi
+}
+
 # @todo: This is wrong, as we should be doing `npm test` instead of calling `grunt qunit` directly.
 function run_qunit {
 	if [ ! -s "$TEMP_DIRECTORY/paths-scope-js" ] || ! check_should_execute 'grunt'; then
diff --git a/pre-commit b/pre-commit
index ce24531..929878b 100755
--- a/pre-commit
+++ b/pre-commit
@@ -40,6 +40,7 @@ echo "## Checking files, scope $CHECK_SCOPE:"
 cat "$TEMP_DIRECTORY/paths-scope"
 
 check_execute_bit
+lint_css_files
 lint_js_files
 lint_php_files
 lint_xml_files
diff --git a/readme.md b/readme.md
index a73823b..3c556b7 100644
--- a/readme.md
+++ b/readme.md
@@ -27,7 +27,7 @@ To install the pre-commit hook, symlink to [`pre-commit`](pre-commit) from your
 ./dev-lib/install-pre-commit-hook.sh
 ```
 
-Also symlink (or copy) the [`.jshintrc`](.jshint), [`.jshintignore`](.jshintignore), [`.jscsrc`](.jscsrc), [`phpcs.xml`](phpcs.xml), and [`phpunit-plugin.xml`](phpunit-plugin.xml) (note the PHPUnit config will need its paths modified if it is copied instead of symlinked):
+Also symlink (or copy) the desired linting configs and [`phpunit-plugin.xml`](phpunit-plugin.xml) (note the PHPUnit config will need its paths modified if it is copied instead of symlinked):
 
 ```bash
 ln -s dev-lib/phpunit-plugin.xml phpunit.xml.dist && git add phpunit.xml.dist # (if working with a plugin)
@@ -36,15 +36,17 @@ ln -s dev-lib/.jshintrc . && git add .jshintrc
 ln -s dev-lib/.jscsrc . && git add .jscsrc
 ln -s dev-lib/.eslintrc . && git add .eslintrc
 ln -s dev-lib/.eslintignore . && git add .eslintignore
+ln -s dev-lib/.stylelintrc . && git add .stylelintrc
 ln -s dev-lib/.editorconfig . && git add .editorconfig
 cp dev-lib/.jshintignore . && git add .jshintignore # don't use symlink for this
 ```
 
-For ESLint, you'll also likely want to make `eslint` as a dev dependency for your NPM package:
+For ESLint and stylelint, you'll also likely want to make them dev dependencies for your NPM package:
 
 ```bash
 npm init # if you don't have a package.json already
 npm install --save-dev eslint
+npm install --save-dev stylelint stylelint-formatter-compact
 git add package.json
 echo 'node_modules' >> .gitignore
 git add .gitignore
@@ -63,7 +65,7 @@ git clone https://github.com/xwp/wp-dev-lib.git ~/Projects/wp-dev-lib
 
 For the Travis CI checks, the `.travis.yml` copied and committed to the repo (see below) will clone the repo into the `dev-lib` directory if it doesn't exist (or whatever your `DEV_LIB_PATH` environment variable is set to).
 
-To install the [`.jshintrc`](.jshint), [`.jshintignore`](.jshintignore), [`.jscsrc`](.jscsrc), and (especially optionally) [`phpcs.xml`](phpcs.xml), copy the files into the repo root (as opposed to creating symlinks, as when installing via submodule).
+To install the [`.jshintrc`](.jshint), [`.jshintignore`](.jshintignore), [`.jscsrc`](.jscsrc), [`.eslintrc`](.eslintrc), [`.stylelintrc`](.stylelintrc), and (especially optionally) [`phpcs.xml`](phpcs.xml), copy the files into the repo root (as opposed to creating symlinks, as when installing via submodule).
 
 To install dev-lib for all themes and plugins that don't already have a `pre-commit` hook installed, and to upgrade the dev-lib for any submodule installations, you can run the bundled script [`install-upgrade-pre-commit-hook.sh`](install-upgrade-pre-commit-hook.sh) which will look for any repos in the current directory tree and attempt to auto-install. For example:
 
diff --git a/travis.script.sh b/travis.script.sh
index 2aa6e2d..b3a001c 100755
--- a/travis.script.sh
+++ b/travis.script.sh
@@ -9,6 +9,7 @@ fi
 echo
 
 check_execute_bit
+lint_css_files
 lint_js_files
 lint_php_files
 lint_xml_files