diff --git a/.github/util/initialize/action.yml b/.github/util/initialize/action.yml
index ad2abda5e..30252d356 100644
--- a/.github/util/initialize/action.yml
+++ b/.github/util/initialize/action.yml
@@ -2,7 +2,7 @@ name: Initialize
 description: Check out Dart Sass and build the embedded protocol buffer.
 inputs:
   github-token: {required: true}
-  node-version: {required: false, default: 18}
+  node-version: {required: false, default: 'lts/*'}
   dart-sdk: {required: false, default: stable}
   architecture: {required: false}
 runs:
diff --git a/.github/workflows/build-android.yml b/.github/workflows/build-android.yml
new file mode 100644
index 000000000..5f2bb57db
--- /dev/null
+++ b/.github/workflows/build-android.yml
@@ -0,0 +1,71 @@
+name: Build for android
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            lib: lib64
+            platform: linux/amd64
+          - arch: ia32
+            lib: lib
+            platform: linux/amd64
+          - arch: arm64
+            lib: lib64
+            platform: linux/arm64
+          - arch: arm
+            lib: lib
+            platform: linux/arm64
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          image: tonistiigi/binfmt:master # need qemu >= 7.0.0
+
+      - name: Compile Protobuf
+        run: |
+          docker run --rm -i \
+                     --volume "$PWD:$PWD" \
+                     --workdir "$PWD" \
+                     docker.io/library/dart <<'EOF'
+          set -e
+          curl -fsSL -H "Authorization: Bearer ${{ github.token }}" "https://github.com/bufbuild/buf/releases/latest/download/buf-$(uname -s)-$(uname -m).tar.gz" | tar -xzC /usr/local --strip-components 1
+          dart pub get
+          dart run grinder protobuf
+          EOF
+
+      - name: Build
+        run: |
+          docker run --rm -i \
+                     --platform ${{ matrix.platform }} \
+                     --privileged \
+                     --volume "$PWD:$PWD" \
+                     --workdir "$PWD" \
+                     ghcr.io/dart-android/dart <<'EOF'
+          set -e
+          export DART_SDK=/system/${{ matrix.lib }}/dart
+          export PATH=$DART_SDK/bin:$PATH
+          dart pub get
+          dart run grinder pkg-standalone-android-${{ matrix.arch }}
+          EOF
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-android-${{ matrix.arch }}
+          path: build/*.tar.gz
+          if-no-files-found: error
+          compression-level: 0
diff --git a/.github/workflows/build-linux-musl.yml b/.github/workflows/build-linux-musl.yml
new file mode 100644
index 000000000..050292f4a
--- /dev/null
+++ b/.github/workflows/build-linux-musl.yml
@@ -0,0 +1,89 @@
+name: Build for linux-musl
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            platform: linux/amd64
+          - arch: ia32
+            platform: linux/386
+          - arch: arm64
+            platform: linux/arm64
+          - arch: arm
+            platform: linux/arm/v7
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Compile Protobuf
+        run: |
+          docker run --rm -i \
+                     --volume "$PWD:$PWD" \
+                     --workdir "$PWD" \
+                     docker.io/library/dart <<'EOF'
+          set -e
+          curl -fsSL -H "Authorization: Bearer ${{ github.token }}" "https://github.com/bufbuild/buf/releases/latest/download/buf-$(uname -s)-$(uname -m).tar.gz" | tar -xzC /usr/local --strip-components 1
+          dart pub get
+          dart run grinder protobuf
+          EOF
+
+      # https://gitlab.com/qemu-project/qemu/-/issues/1729
+      #
+      # There is a bug in qemu's mremap causing pthread_getattr_np in musl to stuck in a loop on arm.
+      # Unless qemu fixes the bug or we get a real linux-arm runner, we cannot build aot-snapshot
+      # for arm on CI. So, we create a kernel snapshot for arm build in amd64 container instead.
+      - name: Build
+        run: |
+          docker run --rm -i \
+                     --platform ${{ matrix.arch == 'arm' && 'linux/amd64' || matrix.platform }} \
+                     --volume "$PWD:$PWD" \
+                     --workdir "$PWD" \
+                     ghcr.io/dart-musl/dart <<'EOF'
+          set -e
+          dart pub get
+          dart run grinder pkg-standalone-linux-${{ matrix.arch }}
+          # Rename the artifact from -linux- to -linux-musl- to avoid conflict with glibc builds.
+          find build -name '*.tar.gz' -print0 | xargs -0 -n 1 -- sh -xc 'mv "$1" "$(echo "$1" | sed -e "s/linux/linux-musl/")"' --
+          EOF
+
+      # The kernel snapshot created for arm in the previous step is bundling a glibc based dart runtime
+      # due to how cli_pkg downloads the sdk for building non-native platforms. Therefore we need to
+      # replace it with musl-libc based dart runtime to create a working linux-musl-arm package.
+      - name: Fix Dart Runtime
+        if: matrix.arch == 'arm'
+        run: |
+          docker run --rm -i \
+                     --platform ${{ matrix.platform }} \
+                     --volume $PWD:$PWD \
+                     --workdir $PWD \
+                     ghcr.io/dart-musl/dart <<'EOF'
+          set -e
+          apk add --no-cache tar
+          cd build
+          DART_RUNTIME=$(tar -tzf *.tar.gz --wildcards "*/src/dart")
+          tar -xzf *.tar.gz
+          cp $DART_SDK/bin/dart $DART_RUNTIME
+          tar -czf *.tar.gz "$(dirname "$(dirname "$DART_RUNTIME")")"
+          EOF
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-linux-musl-${{ matrix.arch }}
+          path: build/*.tar.gz
+          if-no-files-found: error
+          compression-level: 0
diff --git a/.github/workflows/build-linux.yml b/.github/workflows/build-linux.yml
new file mode 100644
index 000000000..e36628c4a
--- /dev/null
+++ b/.github/workflows/build-linux.yml
@@ -0,0 +1,62 @@
+name: Build for linux
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            platform: linux/amd64
+          - arch: ia32
+            platform: linux/amd64
+          - arch: arm
+            platform: linux/arm/v7
+          - arch: arm64
+            platform: linux/arm64
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Compile Protobuf
+        run: |
+          docker run --rm -i \
+                     --volume "$PWD:$PWD" \
+                     --workdir "$PWD" \
+                     docker.io/library/dart <<'EOF'
+          set -e
+          curl -fsSL -H "Authorization: Bearer ${{ github.token }}" "https://github.com/bufbuild/buf/releases/latest/download/buf-$(uname -s)-$(uname -m).tar.gz" | tar -xzC /usr/local --strip-components 1
+          dart pub get
+          dart run grinder protobuf
+          EOF
+
+      - name: Build
+        run: |
+          docker run --rm -i \
+            --platform ${{ matrix.platform }} \
+            --volume "$PWD:$PWD" \
+            --workdir "$PWD" \
+          docker.io/library/dart:latest <<'EOF'
+          set -e
+          dart pub get
+          dart run grinder pkg-standalone-linux-${{ matrix.arch }}
+          EOF
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-linux-${{ matrix.arch }}
+          path: build/*.tar.gz
+          if-no-files-found: error
+          compression-level: 0
diff --git a/.github/workflows/build-macos.yml b/.github/workflows/build-macos.yml
new file mode 100644
index 000000000..7d31257bc
--- /dev/null
+++ b/.github/workflows/build-macos.yml
@@ -0,0 +1,38 @@
+name: Build for macos
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+
+    runs-on: ${{ matrix.runner }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            runner: macos-latest
+          # https://github.blog/2023-10-02-introducing-the-new-apple-silicon-powered-m1-macos-larger-runner-for-github-actions/
+          - arch: arm64
+            runner: macos-latest-xlarge
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Build
+        run: dart run grinder pkg-standalone-macos-${{ matrix.arch }}
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-macos-${{ matrix.arch }}
+          path: build/*.tar.gz
+          if-no-files-found: error
+          compression-level: 0
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
new file mode 100644
index 000000000..7036dfa34
--- /dev/null
+++ b/.github/workflows/build-windows.yml
@@ -0,0 +1,41 @@
+name: Build for windows
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build
+
+    runs-on: ${{ matrix.runner }}
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - arch: x64
+            runner: windows-latest
+          - arch: ia32
+            runner: windows-latest
+          # The support of windows-arm64 dart-sdk is in beta.
+          # TODO: Enable this once windows-arm64 support is stable.
+          # - arch: arm64
+          #   runner: windows-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Build
+        run: dart run grinder pkg-standalone-windows-${{ matrix.arch }}
+
+      - name: Upload Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-windows-${{ matrix.arch }}
+          path: build/*.zip
+          if-no-files-found: error
+          compression-level: 0
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0e55102c9..cabc84e11 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,14 +1,5 @@
 name: CI
 
-defaults:
-  run: {shell: bash}
-
-# The default Node version lives in ../util/initialize/action.yml. It should be
-# kept up-to-date with the latest Node LTS releases, along with the various
-# node-version matrices below.
-#
-# Next update: April 2021
-
 on:
   push:
     branches: [main, feature.*]
@@ -16,317 +7,15 @@ on:
   pull_request:
 
 jobs:
-  format:
-    name: Code formatting
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-    - uses: dart-lang/setup-dart@v1
-    - run: dart format --fix .
-    - run: git diff --exit-code
-
-  static_analysis:
-    name: Static analysis
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Analyze Dart
-        run: dart analyze --fatal-warnings ./
-
-  dartdoc:
-    name: Dartdoc
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: dartdoc sass
-        run: dart run dartdoc --quiet --no-generate-docs
-          --errors ambiguous-doc-reference,broken-link,deprecated
-          --errors unknown-directive,unknown-macro,unresolved-doc-reference
-      - name: dartdoc sass_api
-        run: cd pkg/sass_api && dart run dartdoc --quiet --no-generate-docs
-          --errors ambiguous-doc-reference,broken-link,deprecated
-          --errors unknown-directive,unknown-macro,unresolved-doc-reference
-
-  sass_spec_language:
-    name: "Language Tests | Dart ${{ matrix.dart_channel }} | ${{ matrix.async_label }}"
-    runs-on: ubuntu-latest
-
-    strategy:
-      fail-fast: false
-      matrix:
-        dart_channel: [stable, dev]
-        async_label: [synchronous]
-        async_args: ['']
-        include:
-          - dart_channel: stable
-            async_label: asynchronous
-            async_args: '--cmd-args --async'
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with:
-          dart-sdk: ${{ matrix.dart_channel }}
-          github-token: ${{ github.token }}
-      - uses: ./.github/util/sass-spec
-
-      - name: Run specs
-        run: npm run sass-spec -- --dart .. $extra_args
-        working-directory: sass-spec
-        env: {extra_args: "${{ matrix.async_args }}"}
-
-  # The versions should be kept up-to-date with the latest LTS Node releases.
-  # They next need to be rotated April 2021. See
-  # https://github.com/nodejs/Release.
-  sass_spec_js:
-    name: "JS API Tests | Pure JS | Dart ${{ matrix.dart_channel }} | Node ${{ matrix.node-version }} | ${{ matrix.os }}"
-    runs-on: "${{ matrix.os }}"
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        dart_channel: [stable]
-        node-version: [18]
-        include:
-          # Include LTS versions on Ubuntu
-          - os: ubuntu-latest
-            dart_channel: stable
-            node-version: 16
-          - os: ubuntu-latest
-            dart_channel: stable
-            node-version: 14
-          - os: ubuntu-latest
-            dart_channel: dev
-            node-version: 18
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with:
-          dart-sdk: ${{ matrix.dart_channel }}
-          github-token: ${{ github.token }}
-          node-version: ${{ matrix.node-version }}
-      - uses: ./.github/util/sass-spec
-
-      - name: Build JS
-        run: dart run grinder pkg-npm-dev
-
-      - name: Check out Sass specification
-        uses: sass/clone-linked-repo@v1
-        with:
-          repo: sass/sass
-          path: language
-
-      - name: Run tests
-        run: npm run js-api-spec -- --sassSassRepo ../language --sassPackage ../build/npm
-        working-directory: sass-spec
-
-  # The versions should be kept up-to-date with the latest LTS Node releases.
-  # They next need to be rotated October 2021. See
-  # https://github.com/nodejs/Release.
-  sass_spec_js_embedded:
-    name: 'JS API Tests | Embedded | Node ${{ matrix.node-version }} | ${{ matrix.os }}'
-    runs-on: ${{ matrix.os }}-latest
-    if: "github.event_name != 'pull_request' || !contains(github.event.pull_request.body, 'skip sass-embedded')"
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu, windows, macos]
-        node-version: [18]
-        include:
-          # Include LTS versions on Ubuntu
-          - os: ubuntu
-            node-version: 16
-          - os: ubuntu
-            node-version: 14
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with:
-          github-token: ${{ github.token }}
-          node-version: ${{ matrix.node-version }}
-      - uses: ./.github/util/sass-spec
-
-      - name: Check out the embedded host
-        uses: sass/clone-linked-repo@v1
-        with: {repo: sass/embedded-host-node}
-
-      - name: Check out the language repo
-        uses: sass/clone-linked-repo@v1
-        with: {repo: sass/sass, path: build/language}
-
-      - name: Initialize embedded host
-        run: |
-          npm install
-          npm run init -- --compiler-path=.. --language-path=../build/language
-          npm run compile
-          mv {`pwd`/,dist/}lib/src/vendor/dart-sass
-        working-directory: embedded-host-node
-
-      - name: Version info
-        run: |
-          path=embedded-host-node/dist/lib/src/vendor/dart-sass/sass
-          if [[ -f "$path.cmd" ]]; then "./$path.cmd" --version
-          elif [[ -f "$path.bat" ]]; then "./$path.bat" --version
-          elif [[ -f "$path.exe" ]]; then "./$path.exe" --version
-          else "./$path" --version
-          fi
-
-      - name: Run tests
-        run: npm run js-api-spec -- --sassPackage ../embedded-host-node --sassSassRepo ../build/language
-        working-directory: sass-spec
-
-  sass_spec_js_browser:
-    name: "JS API Tests | Browser | Dart ${{ matrix.dart_channel }}"
-
-    strategy:
-      matrix:
-        dart_channel: [stable]
-      fail-fast: false
-
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - uses: browser-actions/setup-chrome@v1
-      - uses: ./.github/util/initialize
-        with:
-          dart-sdk: ${{ matrix.dart_channel }}
-          github-token: ${{ github.token }}
-      - uses: ./.github/util/sass-spec
-
-      - name: Build JS
-        run: dart run grinder pkg-npm-dev
-
-      - name: Install built dependencies
-        run: npm install
-        working-directory: build/npm
-
-      - name: Check out Sass specification
-        uses: sass/clone-linked-repo@v1
-        with:
-          repo: sass/sass
-          path: language
-
-      - name: Run tests
-        run: npm run js-api-spec -- --sassSassRepo ../language --sassPackage ../build/npm --browser
-        working-directory: sass-spec
-        env:
-          CHROME_EXECUTABLE: chrome
-
-  dart_tests:
-    name: "Dart tests | Dart ${{ matrix.dart_channel }} | ${{ matrix.os }}"
-    runs-on: "${{ matrix.os }}"
-
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        dart_channel: [stable]
-        # TODO(nweiz): Re-enable this when
-        # https://github.com/dart-lang/sdk/issues/52121#issuecomment-1728534228
-        # is addressed.
-        # include: [{os: ubuntu-latest, dart_channel: dev}]
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with:
-          dart-sdk: ${{ matrix.dart_channel }}
-          github-token: ${{ github.token }}
-
-      - run: dart run grinder pkg-standalone-dev
-      - name: Run tests
-        run: dart run test -x node
-
-  # Unit tests that use Node.js, defined in test/.
-  #
-  # The versions should be kept up-to-date with the latest LTS Node releases.
-  # They next need to be rotated April 2021. See
-  # https://github.com/nodejs/Release.
-  node_tests:
-    name: "Node tests | Dart ${{ matrix.dart_channel }} | Node ${{ matrix.node-version }} | ${{ matrix.os }}"
-    runs-on: "${{ matrix.os }}"
-
-    strategy:
-      fail-fast: false
-
-      matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
-        dart_channel: [stable]
-        node-version: [18]
-        include:
-          # Include LTS versions on Ubuntu
-          - os: ubuntu-latest
-            dart_channel: stable
-            node-version: 16
-          - os: ubuntu-latest
-            dart_channel: stable
-            node-version: 14
-          - os: ubuntu-latest
-            dart_channel: dev
-            node-version: 18
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with:
-          dart-sdk: ${{ matrix.dart_channel }}
-          github-token: ${{ github.token }}
-          node-version: ${{ matrix.node-version }}
-
-      - run: dart run grinder pkg-npm-dev
-      - name: Run tests
-        run: dart run test -t node -j 2
-
-  browser_tests:
-    name: "Browser Tests | Dart ${{ matrix.dart_channel }}"
-
-    strategy:
-      matrix:
-        dart_channel: [stable]
-      fail-fast: false
-
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v4
-    - uses: browser-actions/setup-chrome@v1
-    - uses: ./.github/util/initialize
-      with:
-        dart-sdk: ${{ matrix.dart_channel }}
-        github-token: ${{ github.token }}
-
-    - run: dart run grinder pkg-npm-dev
-    - name: Run tests
-      run: dart run test -p chrome -j 2
-      env:
-        CHROME_EXECUTABLE: chrome
+  test:
+    uses: ./.github/workflows/test.yml
+    secrets: inherit
 
   double_check:
     name: Double-check
     runs-on: ubuntu-latest
-    needs:
-    - sass_spec_language
-    - sass_spec_js
-    - sass_spec_js_browser
-    - sass_spec_js_embedded
-    - dart_tests
-    - node_tests
-    - browser_tests
-    - static_analysis
-    - dartdoc
-    - format
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
+    needs: [test]
+    if: "startsWith(github.ref, 'refs/tags/') && github.event.repository.fork == false"
 
     steps:
       - uses: actions/checkout@v4
@@ -336,325 +25,16 @@ jobs:
       - name: Run checks
         run: dart run grinder double-check-before-release
 
-  bootstrap:
-    name: "Bootstrap ${{ matrix.bootstrap_version }}"
-    runs-on: ubuntu-latest
-    needs: [double_check]
-
-    strategy:
-      fail-fast: false
-      matrix:
-        bootstrap_version: [4, 5]
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - run: dart run grinder fetch-bootstrap${{matrix.bootstrap_version}}
-        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
-      - name: Build
-        run: dart bin/sass.dart --quiet build/bootstrap/scss:build/bootstrap-output
-
-  bourbon:
-    name: Bourbon
-    runs-on: ubuntu-latest
+  test_vendor:
     needs: [double_check]
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - run: dart run grinder fetch-bourbon
-        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
-      - name: Test
-        run: |
-          dart bin/sass.dart --quiet -I build/bourbon -I build/bourbon/spec/fixtures \
-              build/bourbon/spec/fixtures:build/bourbon-output
-
-  foundation:
-    name: Foundation
-    runs-on: ubuntu-latest
-    needs: [double_check]
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - run: dart run grinder fetch-foundation
-        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
-      # TODO(nweiz): Foundation has proper Sass tests, but they're currently not
-      # compatible with Dart Sass. Once they are, we should run those rather
-      # than just building the CSS output.
-      - name: Build
-        run: dart bin/sass.dart --quiet build/foundation-sites/assets:build/foundation-output
-
-  bulma:
-    name: Bulma
-    runs-on: ubuntu-latest
-    needs: [double_check]
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - run: dart run grinder fetch-bulma
-        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
-      - name: Build
-        run: dart bin/sass.dart --quiet build/bulma/bulma.sass build/bulma-output.css
-
-  deploy_github_linux:
-    name: "Deploy Github: linux-ia32, linux-x64"
-    runs-on: ubuntu-latest
-    needs: [bootstrap, bourbon, foundation, bulma]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Deploy
-        run: dart run grinder pkg-github-release pkg-github-linux-ia32 pkg-github-linux-x64
-        env:
-          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
-          GH_USER: sassbot
-
-  deploy_github_linux_qemu:
-    name: "Deploy Github: linux-${{ matrix.arch }}"
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        include:
-          - arch: arm
-            platform: linux/arm/v7
-          - arch: arm64
-            platform: linux/arm64
-    needs: [deploy_github_linux]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - uses: docker/setup-qemu-action@v3
-      - name: Deploy
-        run: |
-          docker run --rm \
-            --env "GH_TOKEN=$GH_TOKEN" \
-            --env "GH_USER=$GH_USER" \
-            --platform ${{ matrix.platform }} \
-            --volume "$PWD:$PWD" \
-            --workdir "$PWD" \
-            docker.io/library/dart:latest \
-            /bin/sh -c "dart pub get && dart run grinder pkg-github-linux-${{ matrix.arch }}"
-        env:
-          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
-          GH_USER: sassbot
-
-  deploy_github:
-    name: "Deploy Github: ${{ matrix.platform }}"
-    runs-on: ${{ matrix.runner }}
-    needs: [deploy_github_linux]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-    strategy:
-      matrix:
-        include:
-          - runner: macos-latest
-            platform: macos-x64
-            architecture: x64
-          # https://github.blog/2023-10-02-introducing-the-new-apple-silicon-powered-m1-macos-larger-runner-for-github-actions/
-          - runner: macos-latest-xlarge
-            platform: macos-arm64
-            architecture: arm64
-          - runner: windows-latest
-            platform: windows
-            architecture: x64
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        # Workaround for dart-lang/setup-dart#59
-        with:
-          github-token: ${{ github.token }}
-          architecture: ${{ matrix.architecture }}
-
-      - name: Deploy
-        run: dart run grinder pkg-github-${{ matrix.platform }}
-        env:
-          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
-          GH_USER: sassbot
-
-  deploy_npm:
-    name: Deploy npm
-    runs-on: ubuntu-latest
-    needs: [bootstrap, bourbon, foundation, bulma]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Deploy
-        run: dart run grinder pkg-npm-deploy
-        env:
-          NPM_TOKEN: "${{ secrets.NPM_TOKEN }}"
-
-  deploy_bazel:
-    name: Deploy Bazel
-    runs-on: ubuntu-latest
-    needs: [deploy_npm]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Deploy
-        run: dart run grinder update-bazel
-        env:
-          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
-          GH_USER: sassbot
-
-  deploy_pub:
-    name: "Deploy Pub"
-    runs-on: ubuntu-latest
-    needs: [bootstrap, bourbon, foundation, bulma]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Deploy
-        run: dart run grinder protobuf pkg-pub-deploy
-        env: {PUB_CREDENTIALS: "${{ secrets.PUB_CREDENTIALS }}"}
-
-  deploy_sub_packages:
-    name: "Deploy Sub-Packages"
-    runs-on: ubuntu-latest
-    needs: [deploy_pub]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Deploy
-        run: dart run grinder deploy-sub-packages
-        env:
-          PUB_CREDENTIALS: "${{ secrets.PUB_CREDENTIALS }}"
-          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
-          GH_USER: sassbot
-
-  deploy_homebrew:
-    name: "Deploy Homebrew"
-    runs-on: ubuntu-latest
-    needs: [bootstrap, bourbon, foundation, bulma]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: dart-lang/setup-dart@v1
-      - run: dart pub get
-
-      - name: Deploy
-        run: dart run grinder pkg-homebrew-update
-        env:
-          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
-          GH_USER: sassbot
-
-  deploy_chocolatey:
-    name: "Deploy Chocolatey"
-    runs-on: windows-latest
-    needs: [bootstrap, bourbon, foundation, bulma]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-
-    steps:
-      - uses: actions/checkout@v4
-      - uses: ./.github/util/initialize
-        with: {github-token: "${{ github.token }}"}
-
-      - name: Deploy
-        run: dart run grinder pkg-chocolatey-deploy
-        env: {CHOCOLATEY_TOKEN: "${{ secrets.CHOCOLATEY_TOKEN }}"}
-
-  deploy_website:
-    name: "Deploy sass-lang.com"
-    runs-on: ubuntu-latest
-    needs: [deploy_npm]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          repository: sass/sass-site
-          token: ${{ secrets.SASS_SITE_TOKEN }}
-
-      - name: Get version
-        id: version
-        run: echo "version=${GITHUB_REF##*/}" | tee --append "$GITHUB_OUTPUT"
-
-      - name: Update Dart Sass version
-        run: npm install sass@${{ steps.version.outputs.version }}
-
-      - uses: EndBug/add-and-commit@v9
-        with:
-          author_name: Sass Bot
-          author_email: sass.bot.beep.boop@gmail.com
-          message: Cut a release for a new Dart Sass version
-          commit: --allow-empty
-
-  release_embedded_host:
-    name: "Release Embedded Host"
-    runs-on: ubuntu-latest
-    needs: [deploy_github_linux, deploy_github_linux_qemu, deploy_github]
-    if: "startsWith(github.ref, 'refs/tags/') && github.repository == 'sass/dart-sass'"
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          repository: sass/embedded-host-node
-          token: ${{ secrets.GH_TOKEN }}
-
-      - name: Get version
-        id: version
-        run: |
-          echo "version=${GITHUB_REF##*/}" | tee --append "$GITHUB_OUTPUT"
-          echo "protocol_version=$(curl -fsSL -H "Authorization: Bearer ${{ github.token }}" https://raw.githubusercontent.com/sass/sass/HEAD/spec/EMBEDDED_PROTOCOL_VERSION)" | tee --append "$GITHUB_OUTPUT"
-
-      - name: Update version
-        run: |
-          # Update binary package versions
-          for dir in $(ls npm); do
-            cat "npm/$dir/package.json" |
-                jq --arg version ${{ steps.version.outputs.version }} '
-                  .version |= $version
-                ' > package.json.tmp &&
-              mv package.json.tmp "npm/$dir/package.json"
-          done
-
-          # Update main package version and dependencies on binary packages
-          cat package.json |
-              jq --arg version ${{ steps.version.outputs.version }} --arg protocol_version ${{ steps.version.outputs.protocol_version }} '
-                .version |= $version |
-                ."compiler-version" |= $version |
-                ."protocol-version" |= $protocol_version |
-                .optionalDependencies = (.optionalDependencies | .[] |= $version)
-              ' > package.json.tmp &&
-            mv package.json.tmp package.json
-          curl -fsSL -H "Authorization: Bearer ${{ github.token }}" https://raw.githubusercontent.com/sass/dart-sass/${{ steps.version.outputs.version }}/CHANGELOG.md > CHANGELOG.md
-        shell: bash
-
-      - uses: EndBug/add-and-commit@v9
-        with:
-          author_name: Sass Bot
-          author_email: sass.bot.beep.boop@gmail.com
-          message: Update Dart Sass version and release
-          tag: ${{ steps.version.outputs.version }}
+    if: "startsWith(github.ref, 'refs/tags/') && github.event.repository.fork == false"
+    uses: ./.github/workflows/test-vendor.yml
+    secrets: inherit
+
+  release:
+    needs: [test_vendor]
+    if: "startsWith(github.ref, 'refs/tags/') && github.event.repository.fork == false"
+    permissions:
+      contents: write
+    uses: ./.github/workflows/release.yml
+    secrets: inherit
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
new file mode 100644
index 000000000..43d32c0e4
--- /dev/null
+++ b/.github/workflows/release.yml
@@ -0,0 +1,219 @@
+name: Release
+
+on:
+  workflow_call:
+
+jobs:
+  build_android:
+    uses: ./.github/workflows/build-android.yml
+    secrets: inherit
+
+  build_linux:
+    uses: ./.github/workflows/build-linux.yml
+    secrets: inherit
+
+  build_linux_musl:
+    uses: ./.github/workflows/build-linux-musl.yml
+    secrets: inherit
+
+  build_macos:
+    uses: ./.github/workflows/build-macos.yml
+    secrets: inherit
+
+  build_windows:
+    uses: ./.github/workflows/build-windows.yml
+    secrets: inherit
+
+  release_github:
+    name: Release Github
+    runs-on: ubuntu-latest
+    needs: [build_android, build_linux, build_linux_musl, build_macos, build_windows]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Deploy
+        run: dart run grinder pkg-github-release
+        env:
+          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
+          GH_USER: sassbot
+
+  deploy_github:
+    name: Deploy Github
+    runs-on: ubuntu-latest
+    needs: [release_github]
+
+    permissions:
+      contents: write
+
+    steps:
+      - name: Download Artifact
+        uses: actions/download-artifact@v4
+
+      - name: Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            build-*/*
+
+  deploy_npm:
+    name: Deploy npm
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Deploy
+        run: dart run grinder pkg-npm-deploy
+        env:
+          NPM_TOKEN: "${{ secrets.NPM_TOKEN }}"
+
+  deploy_bazel:
+    name: Deploy Bazel
+    runs-on: ubuntu-latest
+    needs: [deploy_npm]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Deploy
+        run: dart run grinder update-bazel
+        env:
+          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
+          GH_USER: sassbot
+
+  deploy_pub:
+    name: Deploy Pub
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Deploy
+        run: dart run grinder protobuf pkg-pub-deploy
+        env: {PUB_CREDENTIALS: "${{ secrets.PUB_CREDENTIALS }}"}
+
+  deploy_sub_packages:
+    name: Deploy Sub-Packages
+    runs-on: ubuntu-latest
+    needs: [deploy_pub]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Deploy
+        run: dart run grinder deploy-sub-packages
+        env:
+          PUB_CREDENTIALS: "${{ secrets.PUB_CREDENTIALS }}"
+          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
+          GH_USER: sassbot
+
+  deploy_homebrew:
+    name: Deploy Homebrew
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dart-lang/setup-dart@v1
+      - run: dart pub get
+
+      - name: Deploy
+        run: dart run grinder pkg-homebrew-update
+        env:
+          GH_TOKEN: "${{ secrets.GH_TOKEN }}"
+          GH_USER: sassbot
+
+  deploy_chocolatey:
+    name: Deploy Chocolatey
+    runs-on: windows-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Deploy
+        run: dart run grinder pkg-chocolatey-deploy
+        env: {CHOCOLATEY_TOKEN: "${{ secrets.CHOCOLATEY_TOKEN }}"}
+
+  deploy_website:
+    name: Deploy sass-lang.com
+    runs-on: ubuntu-latest
+    needs: [deploy_npm]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: sass/sass-site
+          token: ${{ secrets.SASS_SITE_TOKEN }}
+
+      - name: Get version
+        id: version
+        run: echo "version=${GITHUB_REF##*/}" | tee --append "$GITHUB_OUTPUT"
+
+      - name: Update Dart Sass version
+        run: npm install sass@${{ steps.version.outputs.version }}
+
+      - uses: EndBug/add-and-commit@v9
+        with:
+          author_name: Sass Bot
+          author_email: sass.bot.beep.boop@gmail.com
+          message: Cut a release for a new Dart Sass version
+          commit: --allow-empty
+
+  release_embedded_host:
+    name: Release Embedded Host
+    runs-on: ubuntu-latest
+    needs: [deploy_github]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          repository: sass/embedded-host-node
+          token: ${{ secrets.GH_TOKEN }}
+
+      - name: Get version
+        id: version
+        run: |
+          echo "version=${GITHUB_REF##*/}" | tee --append "$GITHUB_OUTPUT"
+          echo "protocol_version=$(curl -fsSL -H "Authorization: Bearer ${{ github.token }}" https://raw.githubusercontent.com/sass/sass/HEAD/spec/EMBEDDED_PROTOCOL_VERSION)" | tee --append "$GITHUB_OUTPUT"
+
+      - name: Update version
+        run: |
+          # Update binary package versions
+          for dir in $(ls npm); do
+            cat "npm/$dir/package.json" |
+                jq --arg version ${{ steps.version.outputs.version }} '
+                  .version |= $version
+                ' > package.json.tmp &&
+              mv package.json.tmp "npm/$dir/package.json"
+          done
+
+          # Update main package version and dependencies on binary packages
+          cat package.json |
+              jq --arg version ${{ steps.version.outputs.version }} --arg protocol_version ${{ steps.version.outputs.protocol_version }} '
+                .version |= $version |
+                ."compiler-version" |= $version |
+                ."protocol-version" |= $protocol_version |
+                .optionalDependencies = (.optionalDependencies | .[] |= $version)
+              ' > package.json.tmp &&
+            mv package.json.tmp package.json
+          curl -fsSL -H "Authorization: Bearer ${{ github.token }}" https://raw.githubusercontent.com/sass/dart-sass/${{ steps.version.outputs.version }}/CHANGELOG.md > CHANGELOG.md
+        shell: bash
+
+      - uses: EndBug/add-and-commit@v9
+        with:
+          author_name: Sass Bot
+          author_email: sass.bot.beep.boop@gmail.com
+          message: Update Dart Sass version and release
+          tag: ${{ steps.version.outputs.version }}
diff --git a/.github/workflows/test-vendor.yml b/.github/workflows/test-vendor.yml
new file mode 100644
index 000000000..e2d51825e
--- /dev/null
+++ b/.github/workflows/test-vendor.yml
@@ -0,0 +1,72 @@
+name: Test Vendor
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  bootstrap:
+    name: "Bootstrap ${{ matrix.bootstrap_version }}"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        bootstrap_version: [4, 5]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - run: dart run grinder fetch-bootstrap${{matrix.bootstrap_version}}
+        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
+      - name: Build
+        run: dart bin/sass.dart --quiet build/bootstrap/scss:build/bootstrap-output
+
+  bourbon:
+    name: Bourbon
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - run: dart run grinder fetch-bourbon
+        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
+      - name: Test
+        run: |
+          dart bin/sass.dart --quiet -I build/bourbon -I build/bourbon/spec/fixtures \
+              build/bourbon/spec/fixtures:build/bourbon-output
+
+  foundation:
+    name: Foundation
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - run: dart run grinder fetch-foundation
+        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
+      # TODO(nweiz): Foundation has proper Sass tests, but they're currently not
+      # compatible with Dart Sass. Once they are, we should run those rather
+      # than just building the CSS output.
+      - name: Build
+        run: dart bin/sass.dart --quiet build/foundation-sites/assets:build/foundation-output
+
+  bulma:
+    name: Bulma
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - run: dart run grinder fetch-bulma
+        env: {GITHUB_BEARER_TOKEN: "${{ secrets.GITHUB_TOKEN }}"}
+      - name: Build
+        run: dart bin/sass.dart --quiet build/bulma/bulma.sass build/bulma-output.css
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 000000000..aa31b610e
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,309 @@
+name: Test
+
+defaults:
+  run: {shell: bash}
+
+on:
+  workflow_call:
+  workflow_dispatch:
+
+jobs:
+  format:
+    name: Code formatting
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: dart-lang/setup-dart@v1
+    - run: dart format --fix .
+    - run: git diff --exit-code
+
+  static_analysis:
+    name: Static analysis
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: Analyze Dart
+        run: dart analyze --fatal-warnings ./
+
+  dartdoc:
+    name: Dartdoc
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with: {github-token: "${{ github.token }}"}
+
+      - name: dartdoc sass
+        run: dart run dartdoc --quiet --no-generate-docs
+          --errors ambiguous-doc-reference,broken-link,deprecated
+          --errors unknown-directive,unknown-macro,unresolved-doc-reference
+      - name: dartdoc sass_api
+        run: cd pkg/sass_api && dart run dartdoc --quiet --no-generate-docs
+          --errors ambiguous-doc-reference,broken-link,deprecated
+          --errors unknown-directive,unknown-macro,unresolved-doc-reference
+
+  sass_spec_language:
+    name: "Language Tests | Dart ${{ matrix.dart_channel }} | ${{ matrix.async_label }}"
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        dart_channel: [stable, dev]
+        async_label: [synchronous]
+        async_args: ['']
+        include:
+          - dart_channel: stable
+            async_label: asynchronous
+            async_args: '--cmd-args --async'
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with:
+          dart-sdk: ${{ matrix.dart_channel }}
+          github-token: ${{ github.token }}
+      - uses: ./.github/util/sass-spec
+
+      - name: Run specs
+        run: npm run sass-spec -- --dart .. $extra_args
+        working-directory: sass-spec
+        env: {extra_args: "${{ matrix.async_args }}"}
+
+  sass_spec_js:
+    name: "JS API Tests | Pure JS | Dart ${{ matrix.dart_channel }} | Node ${{ matrix.node-version }} | ${{ matrix.os }}"
+    runs-on: "${{ matrix.os }}"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        dart_channel: [stable]
+        node-version: ['lts/*']
+        include:
+          # Test older LTS versions
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-1
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-2
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-3
+          # Test LTS version with dart dev channel
+          - os: ubuntu-latest
+            dart_channel: dev
+            node-version: 'lts/*'
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with:
+          dart-sdk: ${{ matrix.dart_channel }}
+          github-token: ${{ github.token }}
+          node-version: ${{ matrix.node-version }}
+      - uses: ./.github/util/sass-spec
+
+      - name: Build JS
+        run: dart run grinder pkg-npm-dev
+
+      - name: Check out Sass specification
+        uses: sass/clone-linked-repo@v1
+        with:
+          repo: sass/sass
+          path: language
+
+      - name: Run tests
+        run: npm run js-api-spec -- --sassSassRepo ../language --sassPackage ../build/npm
+        working-directory: sass-spec
+
+  sass_spec_js_embedded:
+    name: 'JS API Tests | Embedded | Node ${{ matrix.node-version }} | ${{ matrix.os }}'
+    runs-on: ${{ matrix.os }}
+    if: "github.event_name != 'pull_request' || !contains(github.event.pull_request.body, 'skip sass-embedded')"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        node-version: ['lts/*']
+        include:
+          # Test older LTS versions
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-1
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-2
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-3
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with:
+          github-token: ${{ github.token }}
+          node-version: ${{ matrix.node-version }}
+      - uses: ./.github/util/sass-spec
+
+      - name: Check out the embedded host
+        uses: sass/clone-linked-repo@v1
+        with: {repo: sass/embedded-host-node}
+
+      - name: Check out the language repo
+        uses: sass/clone-linked-repo@v1
+        with: {repo: sass/sass, path: build/language}
+
+      - name: Initialize embedded host
+        run: |
+          npm install
+          npm run init -- --compiler-path=.. --language-path=../build/language
+          npm run compile
+          mv {`pwd`/,dist/}lib/src/vendor/dart-sass
+        working-directory: embedded-host-node
+
+      - name: Version info
+        run: |
+          path=embedded-host-node/dist/lib/src/vendor/dart-sass/sass
+          if [[ -f "$path.cmd" ]]; then "./$path.cmd" --version
+          elif [[ -f "$path.bat" ]]; then "./$path.bat" --version
+          elif [[ -f "$path.exe" ]]; then "./$path.exe" --version
+          else "./$path" --version
+          fi
+
+      - name: Run tests
+        run: npm run js-api-spec -- --sassPackage ../embedded-host-node --sassSassRepo ../build/language
+        working-directory: sass-spec
+
+  sass_spec_js_browser:
+    name: "JS API Tests | Browser | Dart ${{ matrix.dart_channel }}"
+
+    strategy:
+      matrix:
+        dart_channel: [stable]
+      fail-fast: false
+
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: browser-actions/setup-chrome@v1
+      - uses: ./.github/util/initialize
+        with:
+          dart-sdk: ${{ matrix.dart_channel }}
+          github-token: ${{ github.token }}
+      - uses: ./.github/util/sass-spec
+
+      - name: Build JS
+        run: dart run grinder pkg-npm-dev
+
+      - name: Install built dependencies
+        run: npm install
+        working-directory: build/npm
+
+      - name: Check out Sass specification
+        uses: sass/clone-linked-repo@v1
+        with:
+          repo: sass/sass
+          path: language
+
+      - name: Run tests
+        run: npm run js-api-spec -- --sassSassRepo ../language --sassPackage ../build/npm --browser
+        working-directory: sass-spec
+        env:
+          CHROME_EXECUTABLE: chrome
+
+  dart_tests:
+    name: "Dart tests | Dart ${{ matrix.dart_channel }} | ${{ matrix.os }}"
+    runs-on: "${{ matrix.os }}"
+
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        dart_channel: [stable]
+        # TODO(nweiz): Re-enable this when
+        # https://github.com/dart-lang/sdk/issues/52121#issuecomment-1728534228
+        # is addressed.
+        # include: [{os: ubuntu-latest, dart_channel: dev}]
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with:
+          dart-sdk: ${{ matrix.dart_channel }}
+          github-token: ${{ github.token }}
+
+      - run: dart run grinder pkg-standalone-dev
+      - name: Run tests
+        run: dart run test -x node
+
+  # Unit tests that use Node.js, defined in test/.
+  node_tests:
+    name: "Node tests | Dart ${{ matrix.dart_channel }} | Node ${{ matrix.node-version }} | ${{ matrix.os }}"
+    runs-on: "${{ matrix.os }}"
+
+    strategy:
+      fail-fast: false
+
+      matrix:
+        os: [ubuntu-latest, windows-latest, macos-latest]
+        dart_channel: [stable]
+        node-version: ['lts/*']
+        include:
+          # Test older LTS versions
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-1
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-2
+          - os: ubuntu-latest
+            dart_channel: stable
+            node-version: lts/-3
+          # Test LTS version with dart dev channel
+          - os: ubuntu-latest
+            dart_channel: dev
+            node-version: 'lts/*'
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/util/initialize
+        with:
+          dart-sdk: ${{ matrix.dart_channel }}
+          github-token: ${{ github.token }}
+          node-version: ${{ matrix.node-version }}
+
+      - run: dart run grinder pkg-npm-dev
+      - name: Run tests
+        run: dart run test -t node -j 2
+
+  browser_tests:
+    name: "Browser Tests | Dart ${{ matrix.dart_channel }}"
+
+    strategy:
+      matrix:
+        dart_channel: [stable]
+      fail-fast: false
+
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: browser-actions/setup-chrome@v1
+    - uses: ./.github/util/initialize
+      with:
+        dart-sdk: ${{ matrix.dart_channel }}
+        github-token: ${{ github.token }}
+
+    - run: dart run grinder pkg-npm-dev
+    - name: Run tests
+      run: dart run test -p chrome -j 2
+      env:
+        CHROME_EXECUTABLE: chrome
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a4995a0cb..5f520294c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,8 @@
   points that aren't in the US-ASCII region. Previously only code points U+0100
   LATIN CAPITAL LETTER A WITH MACRON were escaped.
 
+* Provide official releases for musl LibC and for Android.
+
 ### JS API
 
 * Fix a bug where certain exceptions could produce `SourceSpan`s that didn't