diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 87ac6e7f0..389009b7e 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -76,6 +76,42 @@ jobs:
         run: bash prebuild.sh
         working-directory: scripts
 
+      - name: Verify committed generated files are up to date
+        run: |
+          # build_runner always replaces conflicting outputs, which can take
+          # the gitignored app config too (source_gen claims <x>.dart ->
+          # <x>.g.dart for every input), and ensure_test_app_config.sh's stub
+          # is not the configured app, so put the configured file back and
+          # leave the script as the fallback.
+          SAVED_APP_CONFIG="${RUNNER_TEMP:-/tmp}/app_config.g.dart.saved"
+          cp lib/app_config.g.dart "$SAVED_APP_CONFIG"
+          dart run build_runner build
+          cp "$SAVED_APP_CONFIG" lib/app_config.g.dart
+          bash scripts/ensure_test_app_config.sh
+          # hive_ce emits a registrar nothing here imports; never delete it if
+          # someone has committed it.
+          if [ -f lib/hive_registrar.g.dart ] \
+             && ! git ls-files --error-unmatch lib/hive_registrar.g.dart >/dev/null 2>&1; then
+            rm -f lib/hive_registrar.g.dart
+          fi
+          # Committed generated files are kept dart format clean (the format
+          # step above checks them like any other changed file), but the
+          # generators format with their own dart_style, so compare formatted
+          # output.
+          git ls-files -m -o --exclude-standard -- '*.mocks.dart' '*.g.dart' \
+            | while read -r f; do if [ -f "$f" ]; then echo "$f"; fi; done \
+            | sort -u | xargs -r dart format
+
+          # build.yaml never runs build_runner, so releases are compiled from
+          # the committed *.g.dart; stale isar/drift output has to fail the job
+          # here or nothing checks it at all.
+          GENERATED_STATUS=$(git status --porcelain -- '*.mocks.dart' '*.g.dart')
+          if [ -n "$GENERATED_STATUS" ]; then
+            echo "$GENERATED_STATUS"
+            echo "::error::Committed generated files differ from build_runner output; re-run scripts/dev/build_runner.sh, dart format the changed files and commit the result."
+            exit 1
+          fi
+
 #      - name: Analyze
 #        run: flutter analyze
       - name: Test