diff --git a/.github/workflows/lint_md_all.yml b/.github/workflows/lint_md_all.yml
new file mode 100644
index 00000000..a0a6e569
--- /dev/null
+++ b/.github/workflows/lint_md_all.yml
@@ -0,0 +1,15 @@
+name: Lint Markdown (all)
+
+on: 
+  workflow_dispatch:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: DavidAnson/markdownlint-cli2-action@v13
+      with:
+        globs: |
+          *.md
+          !test/*.md