diff --git a/.github/workflows/dart_packages_test.yml b/.github/workflows/dart_packages_test.yml
new file mode 100644
index 0000000000..6cf6529eed
--- /dev/null
+++ b/.github/workflows/dart_packages_test.yml
@@ -0,0 +1,100 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Analyzes, formats and tests the pure Dart packages under dart/.
+#
+# The Flutter workflow builds its matrix from samples/, so the packages that
+# ship to pub.dev were not covered by any job. This workflow holds them to the
+# same bar the samples are held to: formatting, analysis with --fatal-infos,
+# and the package's own tests.
+name: Dart CI
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name || github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.generate_matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+
+      - name: Generate testing matrix
+        id: generate_matrix
+        run: |
+          DIRS_TO_TEST=$(find dart -name pubspec.yaml -not -path "*/.dart_tool/*" -exec dirname {} \;)
+
+          JSON_MATRIX="["
+          FIRST=true
+          for dir in $DIRS_TO_TEST; do
+            if [ "$FIRST" = false ]; then
+              JSON_MATRIX="$JSON_MATRIX,"
+            fi
+            FIRST=false
+            package_name=$(echo "$dir" | tr '/' '_')
+            JSON_MATRIX="$JSON_MATRIX{\"name\":\"$package_name\",\"path\":\"$dir\"}"
+          done
+          JSON_MATRIX="$JSON_MATRIX]"
+
+          echo "matrix=$JSON_MATRIX" >> $GITHUB_OUTPUT
+
+  analyze_and_test:
+    needs: matrix
+    name: ${{ matrix.package.name }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        package: ${{ fromJson(needs.matrix.outputs.matrix) }}
+    steps:
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
+        with:
+          persist-credentials: false
+
+      # The packages resolve through the monorepo workspace, whose root pubspec
+      # declares a Flutter SDK constraint, so a Dart-only SDK cannot resolve
+      # them. See https://github.com/a2ui-project/a2ui/issues/2463.
+      - uses: ./.github/actions/setup-dart
+
+      - name: Install dependencies
+        working-directory: ${{ matrix.package.path }}
+        run: dart pub get
+
+      - name: Check formatting
+        working-directory: ${{ matrix.package.path }}
+        run: dart format --output=none --set-exit-if-changed .
+
+      - name: Analyze code
+        working-directory: ${{ matrix.package.path }}
+        run: dart analyze --fatal-infos
+
+      - name: Run tests
+        working-directory: ${{ matrix.package.path }}
+        run: dart test
diff --git a/dart/a2ui_core/test/conformance/message_processor_conformance_test.dart b/dart/a2ui_core/test/conformance/message_processor_conformance_test.dart
index 7ba11b9a51..7694ea9d72 100644
--- a/dart/a2ui_core/test/conformance/message_processor_conformance_test.dart
+++ b/dart/a2ui_core/test/conformance/message_processor_conformance_test.dart
@@ -157,9 +157,11 @@ void _checkComponents(
   List<Map<String, Object?>> expected,
   String reason,
 ) {
-  expect(surface.componentsModel.all.map((c) => c.id).toSet(), {
-    for (final Map<String, Object?> entry in expected) entry['id'],
-  }, reason: '$reason: component ids');
+  expect(
+    surface.componentsModel.all.map((c) => c.id).toSet(),
+    {for (final Map<String, Object?> entry in expected) entry['id']},
+    reason: '$reason: component ids',
+  );
 
   for (final entry in expected) {
     final id = entry['id']! as String;
diff --git a/dart/a2ui_core/test/validator_test.dart b/dart/a2ui_core/test/validator_test.dart
index 2efb3849f8..b30a4a7502 100644
--- a/dart/a2ui_core/test/validator_test.dart
+++ b/dart/a2ui_core/test/validator_test.dart
@@ -509,9 +509,11 @@ void main() {
         },
       });
 
-      expect(extractComponentRefFields(inlined)['Card']!.single, {
-        'child',
-      }, reason: 'id must not be read as a child reference');
+      expect(
+        extractComponentRefFields(inlined)['Card']!.single,
+        {'child'},
+        reason: 'id must not be read as a child reference',
+      );
 
       final A2uiValidator<ComponentApi, FunctionApi> validator = A2uiValidator(
         catalogs: [inlined],