diff --git a/.github/actionlint.yml b/.github/actionlint.yml
new file mode 100644
index 000000000..883cdd763
--- /dev/null
+++ b/.github/actionlint.yml
@@ -0,0 +1,6 @@
+paths:
+  .github/workflows/**/*.yml:
+    ignore:
+      # The steps that load '.env' source an environment snapshot from a path
+      # created at runtime, which shellcheck cannot resolve.
+      - 'shellcheck reported issue in this script: SC1090:.+'
diff --git a/.github/workflows/vortex-test-common.yml b/.github/workflows/vortex-test-common.yml
index c42949756..a8e46f2a5 100644
--- a/.github/workflows/vortex-test-common.yml
+++ b/.github/workflows/vortex-test-common.yml
@@ -273,7 +273,7 @@ jobs:
         continue-on-error: ${{ vars.VORTEX_CI_YAMLLINT_IGNORE_FAILURE == '1' }}
 
       - name: Check coding standards with actionlint
-        run: docker run --rm -v "${GITHUB_WORKSPACE:-.}":/app --workdir /app rhysd/actionlint:1.7.12 -ignore 'SC2002:' -ignore 'SC2155:' -ignore 'SC2015:' -ignore 'SC2046:' -ignore 'SC1090:'
+        run: docker run --rm -v "${GITHUB_WORKSPACE:-.}":/app --workdir /app rhysd/actionlint:1.7.12 -ignore 'SC2002:' -ignore 'SC2155:' -ignore 'SC2015:' -ignore 'SC2046:'
         continue-on-error: ${{ vars.VORTEX_CI_ACTIONLINT_IGNORE_FAILURE == '1' }}
 
       - name: Check GitHub Actions security with Zizmor
diff --git a/.vortex/installer/tests/Fixtures/handler_process/_baseline/.github/actionlint.yml b/.vortex/installer/tests/Fixtures/handler_process/_baseline/.github/actionlint.yml
new file mode 100644
index 000000000..883cdd763
--- /dev/null
+++ b/.vortex/installer/tests/Fixtures/handler_process/_baseline/.github/actionlint.yml
@@ -0,0 +1,6 @@
+paths:
+  .github/workflows/**/*.yml:
+    ignore:
+      # The steps that load '.env' source an environment snapshot from a path
+      # created at runtime, which shellcheck cannot resolve.
+      - 'shellcheck reported issue in this script: SC1090:.+'
diff --git a/.vortex/installer/tests/Fixtures/handler_process/code_provider_other/.github/-actionlint.yml b/.vortex/installer/tests/Fixtures/handler_process/code_provider_other/.github/-actionlint.yml
new file mode 100644
index 000000000..e69de29bb