diff --git a/.build/clean.sh b/.build/clean.sh
new file mode 100755
index 0000000..a816cb8
--- /dev/null
+++ b/.build/clean.sh
@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+set -e
+
+[ -n "$PICO_BUILD_ENV" ] || { echo "No Pico build environment specified" >&2; exit 1; }
+
+# parameters
+ARCHIVE_DIR="${1:-$PICO_PROJECT_DIR}"   # directory to create release archives in
+
+# print parameters
+echo "Cleaning up build environment..."
+printf 'PICO_DEPLOY_DIR="%s"\n' "$PICO_DEPLOY_DIR"
+printf 'PICO_BUILD_DIR="%s"\n' "$PICO_BUILD_DIR"
+printf 'ARCHIVE_DIR="%s"\n' "$ARCHIVE_DIR"
+echo
+
+echo "Removing deployment directory..."
+[ ! -d "$PICO_DEPLOY_DIR" ] || rm -rf "$PICO_DEPLOY_DIR"
+
+echo "Removing build directory..."
+[ ! -d "$PICO_BUILD_DIR" ] || rm -rf "$PICO_BUILD_DIR"
+
+echo "Removing release archives..."
+find "$ARCHIVE_DIR" -mindepth 1 -maxdepth 1 \
+    \( -name 'pico-release-*.tar.gz' -o -name 'pico-release-*.zip' \) \
+    -delete
diff --git a/.build/create-release.sh b/.build/create-release.sh
deleted file mode 100755
index 8a799a2..0000000
--- a/.build/create-release.sh
+++ /dev/null
@@ -1,97 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-export PATH="$PICO_TOOLS_DIR:$PATH"
-. "$PICO_TOOLS_DIR/functions/parse-version.sh.inc"
-
-# parameters
-ARCHIVE_DIR="$1"        # directory to create release archives in
-ARCHIVE_FILENAME="$2"   # release archive file name (without file extension)
-
-if [ -z "$ARCHIVE_DIR" ] || [ "$(realpath "$ARCHIVE_DIR")" == "$(realpath "$PICO_BUILD_DIR")" ]; then
-    echo "Unable to create release archives: Invalid release archive target dir '$ARCHIVE_DIR'" >&2
-    exit 1
-fi
-if [ -z "$ARCHIVE_FILENAME" ]; then
-    echo "Unable to create release archives: No release archive file name given" >&2
-    exit 1
-fi
-
-# parse version
-if ! parse_version "$PROJECT_REPO_TAG"; then
-    echo "Unable to create release archive: Invalid version '$PROJECT_REPO_TAG'" >&2
-    exit 1
-fi
-
-# clone repo
-github-clone.sh "$PICO_BUILD_DIR" "https://github.com/$RELEASE_REPO_SLUG.git" "$RELEASE_REPO_BRANCH"
-
-cd "$PICO_BUILD_DIR"
-
-# force Pico version
-echo "Updating composer dependencies..."
-composer require --no-update \
-    "picocms/pico $VERSION_FULL@$VERSION_STABILITY" \
-    "picocms/pico-theme $VERSION_FULL@$VERSION_STABILITY" \
-    "picocms/pico-deprecated $VERSION_FULL@$VERSION_STABILITY"
-echo
-
-# set minimum stability
-if [ "$VERSION_STABILITY" != "stable" ]; then
-    echo "Setting minimum stability to '$VERSION_STABILITY'..."
-    composer config "minimum-stability" "$VERSION_STABILITY"
-    composer config "prefer-stable" "true"
-    echo
-fi
-
-# install dependencies
-echo "Running \`composer install\`..."
-composer install --no-suggest --prefer-dist --no-dev --optimize-autoloader
-echo
-
-# prepare release
-echo "Replacing 'index.php'..."
-cp vendor/picocms/pico/index.php.dist index.php
-
-echo "Adding 'README.md', 'CONTRIBUTING.md', 'CHANGELOG.md'..."
-cp vendor/picocms/pico/README.md README.md
-cp vendor/picocms/pico/CONTRIBUTING.md CONTRIBUTING.md
-cp vendor/picocms/pico/CHANGELOG.md CHANGELOG.md
-
-echo "Preparing 'composer.json' for release..."
-composer require --no-update \
-    "picocms/pico ^$VERSION_MILESTONE" \
-    "picocms/pico-theme ^$VERSION_MILESTONE" \
-    "picocms/pico-deprecated ^$VERSION_MILESTONE"
-
-echo "Removing '.git' directory..."
-rm -rf .git
-
-echo "Removing '.git' directories of dependencies..."
-find vendor/ -type d -path 'vendor/*/*/.git' -print0 | xargs -0 rm -rf
-find themes/ -type d -path 'themes/*/.git' -print0 | xargs -0 rm -rf
-find plugins/ -type d -path 'plugins/*/.git' -print0 | xargs -0 rm -rf
-
-echo
-
-# create release archives
-echo "Creating release archive '$ARCHIVE.tar.gz'..."
-
-if [ -e "$ARCHIVE_DIR/$ARCHIVE.tar.gz" ]; then
-    echo "Unable to create release archive: File '$ARCHIVE.tar.gz' exists" >&2
-    exit 1
-fi
-
-find . -mindepth 1 -maxdepth 1 -printf '%f\0' \
-    | xargs -0 -- tar -czf "$ARCHIVE_DIR/$ARCHIVE.tar.gz" --
-echo
-
-echo "Creating release archive '$ARCHIVE.zip'..."
-
-if [ -e "$ARCHIVE_DIR/$ARCHIVE.zip" ]; then
-    echo "Unable to create release archive: File '$ARCHIVE.zip' exists" >&2
-    exit 1
-fi
-
-zip -q -r "$ARCHIVE_DIR/$ARCHIVE.zip" .
-echo
diff --git a/.build/deploy-branch.sh b/.build/deploy-branch.sh
index 3917aa1..d8284a7 100755
--- a/.build/deploy-branch.sh
+++ b/.build/deploy-branch.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 set -e
 
-export PATH="$PICO_TOOLS_DIR:$PATH"
+[ -n "$PICO_BUILD_ENV" ] || { echo "No Pico build environment specified" >&2; exit 1; }
 
 # get current Pico milestone
 VERSION="$(php -r "require_once('$PICO_PROJECT_DIR/lib/Pico.php'); echo Pico::VERSION;")"
diff --git a/.build/deploy-release.sh b/.build/deploy-release.sh
index c105d19..eef5d70 100755
--- a/.build/deploy-release.sh
+++ b/.build/deploy-release.sh
@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -e
 
+[ -n "$PICO_BUILD_ENV" ] || { echo "No Pico build environment specified" >&2; exit 1; }
+
 DEPLOY_FULL="true"
 if [ "$DEPLOY_PHPDOC_RELEASES" != "true" ]; then
     echo "Skipping phpDoc release deployment because it has been disabled"
@@ -31,10 +33,9 @@ if [ "$DEPLOY_FULL" != "true" ]; then
     echo
 fi
 
-export PATH="$PICO_TOOLS_DIR:$PATH"
+# parse version
 . "$PICO_TOOLS_DIR/functions/parse-version.sh.inc"
 
-# parse version
 if ! parse_version "$PROJECT_REPO_TAG"; then
     echo "Invalid version '$PROJECT_REPO_TAG'; aborting..." >&2
     exit 1
diff --git a/.build/deploy.sh b/.build/deploy.sh
deleted file mode 100755
index 0ef0c10..0000000
--- a/.build/deploy.sh
+++ /dev/null
@@ -1,6 +0,0 @@
-#!/usr/bin/env bash
-if [ -n "$PROJECT_REPO_TAG" ]; then
-    exec "$(dirname "$0")/deploy-release.sh"
-else
-    exec "$(dirname "$0")/deploy-branch.sh"
-fi
diff --git a/.build/init.sh.inc b/.build/init.sh.inc
new file mode 100644
index 0000000..e9cee44
--- /dev/null
+++ b/.build/init.sh.inc
@@ -0,0 +1,19 @@
+if [ -z "$PICO_BUILD_ENV" ]; then
+    echo "No Pico build environment specified" >&2
+    exit 1
+fi
+
+# add project build dir to $PATH
+export PATH="$PICO_PROJECT_DIR/.build:$PATH"
+
+# set environment variables
+__picocms_cmd export RELEASE_REPO_SLUG="${RELEASE_REPO_SLUG:-picocms/pico-composer}"
+__picocms_cmd export RELEASE_REPO_BRANCH="${RELEASE_REPO_BRANCH:-master}"
+
+if [ "$PROJECT_REPO_SLUG" != "picocms/Pico" ]; then
+    __picocms_cmd export DEPLOY_REPO_SLUG="${DEPLOY_REPO_SLUG:-$PROJECT_REPO_SLUG}"
+    __picocms_cmd export DEPLOY_REPO_BRANCH="${DEPLOY_REPO_BRANCH:-gh-pages}"
+else
+    __picocms_cmd export DEPLOY_REPO_SLUG="${DEPLOY_REPO_SLUG:-picocms.github.io}"
+    __picocms_cmd export DEPLOY_REPO_BRANCH="${DEPLOY_REPO_BRANCH:-master}"
+fi
diff --git a/.build/install.sh b/.build/install.sh
index 9e047f8..dff079c 100755
--- a/.build/install.sh
+++ b/.build/install.sh
@@ -1,55 +1,17 @@
 #!/usr/bin/env bash
 set -e
 
+[ -n "$PICO_BUILD_ENV" ] || { echo "No Pico build environment specified" >&2; exit 1; }
+
 # setup build system
-echo "Installing build dependencies..."
-echo
-
-case "$1" in
-    "--deploy")
-        echo "Synchronizing package index files..."
-        sudo apt-get update
-        echo
-
-        echo "Installing cloc..."
-        sudo apt-get install -y cloc
-        echo
-
-        echo "Installing phpDocumentor..."
-        curl --location --output "$PICO_TOOLS_DIR/phpdoc" \
-            "https://github.com/phpDocumentor/phpDocumentor2/releases/latest/download/phpDocumentor.phar"
-        chmod +x "$PICO_TOOLS_DIR/phpdoc"
-        echo
-        ;;
-esac
-
-echo "Installing PHP_CodeSniffer..."
-if [ "$(php -r 'echo PHP_VERSION_ID;')" -ge 50400 ]; then
-    PHPCS_DOWNLOAD="https://github.com/squizlabs/PHP_CodeSniffer/releases/latest/download/"
-else
-    PHPCS_DOWNLOAD="https://github.com/squizlabs/PHP_CodeSniffer/releases/download/2.9.2/"
-fi
-
-curl --location --output "$PICO_TOOLS_DIR/phpcs" \
-    "$PHPCS_DOWNLOAD/phpcs.phar"
-chmod +x "$PICO_TOOLS_DIR/phpcs"
-
-curl --location --output "$PICO_TOOLS_DIR/phpcbf" \
-    "$PHPCS_DOWNLOAD/phpcbf.phar"
-chmod +x "$PICO_TOOLS_DIR/phpcbf"
-
-echo
-
-# setup composer
-echo "Setup Composer..."
-
-# let composer use our GITHUB_OAUTH_TOKEN
-if [ -n "$GITHUB_OAUTH_TOKEN" ]; then
-    composer config --global github-oauth.github.com "$GITHUB_OAUTH_TOKEN"
-fi
+BUILD_REQUIREMENTS=( --phpcs )
+[ "$1" != "--deploy" ] || BUILD_REQUIREMENTS+=( --cloc --phpdoc )
+"$PICO_TOOLS_DIR/setup/$PICO_BUILD_ENV.sh" "${BUILD_REQUIREMENTS[@]}"
 
 # set COMPOSER_ROOT_VERSION when necessary
 if [ -z "$COMPOSER_ROOT_VERSION" ] && [ -n "$PROJECT_REPO_BRANCH" ]; then
+    echo "Setting up Composer..."
+
     PICO_VERSION_PATTERN="$(php -r "
         \$json = json_decode(file_get_contents('$PICO_PROJECT_DIR/composer.json'), true);
         if (\$json !== null) {
@@ -69,9 +31,9 @@ if [ -z "$COMPOSER_ROOT_VERSION" ] && [ -n "$PROJECT_REPO_BRANCH" ]; then
     if [ -n "$PICO_VERSION_PATTERN" ]; then
         export COMPOSER_ROOT_VERSION="$PICO_VERSION_PATTERN"
     fi
-fi
 
-echo
+    echo
+fi
 
 # install dependencies
 echo "Running \`composer install\`$([ -n "$COMPOSER_ROOT_VERSION" ] && echo -n " ($COMPOSER_ROOT_VERSION)")..."
diff --git a/.build/release.sh b/.build/release.sh
new file mode 100755
index 0000000..9623b3f
--- /dev/null
+++ b/.build/release.sh
@@ -0,0 +1,86 @@
+#!/usr/bin/env bash
+set -e
+
+[ -n "$PICO_BUILD_ENV" ] || { echo "No Pico build environment specified" >&2; exit 1; }
+
+# parameters
+VERSION="${1:-$PROJECT_REPO_TAG}"       # version to create a release for
+ARCHIVE_DIR="${2:-$PICO_PROJECT_DIR}"   # directory to create release archives in
+
+# print parameters
+echo "Creating new release..."
+printf 'VERSION="%s"\n' "$VERSION"
+echo
+
+# guess version string
+if [ -z "$VERSION" ]; then
+    PICO_VERSION="$(php -r "
+        require_once('$PICO_PROJECT_DIR/lib/Pico.php');
+        echo preg_replace('/-(?:dev|n|nightly)(?:[.-]?[0-9]+)?(?:[.-]dev)?$/', '', Pico::VERSION);
+    ")"
+
+    VERSION="v$PICO_VERSION-dev+${PROJECT_REPO_BRANCH:-master}"
+    echo "Creating development release of Pico v$PICO_VERSION ($VERSION)..."
+    echo
+fi
+
+# parse version
+. "$PICO_TOOLS_DIR/functions/parse-version.sh.inc"
+
+if ! parse_version "$VERSION"; then
+    echo "Unable to create release archive: Invalid version '$VERSION'" >&2
+    exit 1
+fi
+
+DEPENDENCY_VERSION="$VERSION_FULL@$VERSION_STABILITY"
+if [ "$VERSION_STABILITY" == "dev" ] && [ -n "$VERSION_BUILD" ]; then
+    DEPENDENCY_VERSION="dev-$VERSION_BUILD"
+fi
+
+# clone repo
+github-clone.sh "$PICO_BUILD_DIR" "https://github.com/$RELEASE_REPO_SLUG.git" "$RELEASE_REPO_BRANCH"
+
+cd "$PICO_BUILD_DIR"
+
+# force Pico version
+echo "Updating composer dependencies..."
+composer require --no-update \
+    "picocms/pico $DEPENDENCY_VERSION" \
+    "picocms/pico-theme $DEPENDENCY_VERSION" \
+    "picocms/pico-deprecated $DEPENDENCY_VERSION"
+echo
+
+# set minimum stability
+if [ "$VERSION_STABILITY" != "stable" ]; then
+    echo "Setting minimum stability to '$VERSION_STABILITY'..."
+    composer config "minimum-stability" "$VERSION_STABILITY"
+    composer config "prefer-stable" "true"
+    echo
+fi
+
+# install dependencies
+echo "Running \`composer install\`..."
+composer install --no-suggest --prefer-dist --no-dev --optimize-autoloader
+echo
+
+# prepare release
+echo "Replacing 'index.php'..."
+cp vendor/picocms/pico/index.php.dist index.php
+
+echo "Adding 'README.md', 'CONTRIBUTING.md', 'CHANGELOG.md'..."
+cp vendor/picocms/pico/README.md README.md
+cp vendor/picocms/pico/CONTRIBUTING.md CONTRIBUTING.md
+cp vendor/picocms/pico/CHANGELOG.md CHANGELOG.md
+
+echo "Removing '.git' directories of plugins and themes..."
+find themes/ -type d -path 'themes/*/.git' -print0 | xargs -0 rm -rf
+find plugins/ -type d -path 'plugins/*/.git' -print0 | xargs -0 rm -rf
+
+echo "Preparing 'composer.json' for release..."
+composer require --no-update \
+    "picocms/pico ^$VERSION_MILESTONE" \
+    "picocms/pico-theme ^$VERSION_MILESTONE" \
+    "picocms/pico-deprecated ^$VERSION_MILESTONE"
+
+# create release archives
+create-release.sh "$PICO_BUILD_DIR" "$ARCHIVE_DIR" "pico-release-v$VERSION_FULL"
diff --git a/.gitattributes b/.gitattributes
index f03d557..bc9dbf2 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -1,5 +1,5 @@
-/.github            export-ignore
 /.build             export-ignore
+/.github            export-ignore
 /assets/.gitignore  export-ignore
 /config/.gitignore  export-ignore
 /content/.gitignore export-ignore
diff --git a/.gitignore b/.gitignore
index bccec62..490151f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,12 +10,17 @@ desktop.ini
 .DS_Store
 ._*
 
-# composer
+# Composer
 /composer.lock
-/composer.phar
 /vendor
 
+# Build system
+/.build/build
+/.build/deploy
+/.build/ci-tools
+/pico-release-*.tar.gz
+/pico-release-*.zip
+
 # phpDocumentor
 /.build/phpdoc
 /.build/phpdoc.cache
-/phpDocumentor.phar
diff --git a/.travis.yml b/.travis.yml
index 5e5ecbc..6c36396 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -23,48 +23,52 @@ jobs:
     - php: hhvm-3.27 # until Sep 2019
     - php: hhvm-3.30 # until Nov 2019
 
-    # Deployment stage
-    - stage: deploy
-      php: 5.3
-      dist: precise
+    # Branch deployment stage
+    - stage: deploy-branch
+      if: type == "push" && tag IS blank
+      php: 5.6
       sudo: required
       install:
-        - '[ "$TRAVIS_PULL_REQUEST" == "false" ] || travis_terminate 0'
-        - '[ -n "$TRAVIS_TAG" ] || [[ ",$DEPLOY_PHPDOC_BRANCHES," == *,"$TRAVIS_BRANCH",* ]] || travis_terminate 0'
+        - '[[ ",$DEPLOY_PHPDOC_BRANCHES," == *,"$TRAVIS_BRANCH",* ]] || travis_terminate 0'
         - install.sh --deploy
       script:
-        - deploy.sh
+        - deploy-branch.sh
+
+    # Release deployment stage
+    - stage: deploy-release
+      if: tag IS present
+      php: 5.3
+      dist: precise
+      install:
+        - install.sh --deploy
+      script:
+        - '[ "$PROJECT_REPO_TAG" == "v$(php -r "require_once(\"lib/Pico.php\"); echo Pico::VERSION;")" ]'
+        - deploy-release.sh
       before_deploy:
-        - '[ "$TRAVIS_TAG" == "v$(php -r "require_once(\"lib/Pico.php\"); echo Pico::VERSION;")" ]'
-        - create-release.sh "$TRAVIS_BUILD_DIR" "pico-release-$TRAVIS_TAG"
+        - release.sh
       deploy:
         provider: releases
         api_key: ${GITHUB_OAUTH_TOKEN}
         file:
-          - pico-release-$TRAVIS_TAG.tar.gz
-          - pico-release-$TRAVIS_TAG.zip
+          - pico-release-$PROJECT_REPO_TAG.tar.gz
+          - pico-release-$PROJECT_REPO_TAG.zip
         skip_cleanup: true
-        name: Version ${TRAVIS_TAG:1}
+        name: Version ${PROJECT_REPO_TAG:1}
         draft: true
-        on:
-          tags: true
 
   # Ignore nightly build failures
   allow_failures:
     - php: nightly
-  fast-finish: true
+  fast_finish: true
 
 before_install:
-  - export PATH="$TRAVIS_BUILD_DIR/.build:$PATH"
   - export PICO_TOOLS_DIR="$HOME/__picocms_tools"
   - git clone --branch="$TOOLS_REPO_BRANCH" "https://github.com/$TOOLS_REPO_SLUG.git" "$PICO_TOOLS_DIR"
   - . "$PICO_TOOLS_DIR/init/travis.sh.inc"
+  - . "$PICO_PROJECT_DIR/.build/init.sh.inc"
 
 install:
   - install.sh
 
-before_script:
-  - export PATH="$TRAVIS_BUILD_DIR/vendor/bin:$PATH"
-
 script:
-  - phpcs --standard=.phpcs.xml "$TRAVIS_BUILD_DIR"
+  - phpcs --standard=.phpcs.xml "$PICO_PROJECT_DIR"