diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b35436e..bb589fa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1033,6 +1033,15 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
 
+  validate-typings:
+    runs-on: "ubuntu-latest"
+    steps:
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
+        with:
+          persist-credentials: false
+      - name: Validate typings
+        uses: typesafegithub/github-actions-typing@184d97003b1300f6a10e286eb98c191e416ff02b # v2.2.1
+
   all-tests-passed:
     runs-on: ubuntu-latest
     needs:
@@ -1081,6 +1090,7 @@ jobs:
       - test-restore-python-installs
       - test-python-install-dir
       - test-act
+      - validate-typings
     if: always()
     steps:
       - name: All tests passed
diff --git a/action-types.yml b/action-types.yml
new file mode 100644
index 0000000..5aeb0cf
--- /dev/null
+++ b/action-types.yml
@@ -0,0 +1,71 @@
+# See https://github.com/typesafegithub/github-actions-typing
+
+inputs:
+  version:
+    type: string
+  version-file:
+    type: string
+  python-version:
+    type: string
+  activate-environment:
+    type: boolean
+  working-directory:
+    type: string
+  checksum:
+    type: string
+  github-token:
+    type: string
+  enable-cache:
+    type: enum
+    allowed-values:
+      - "true"
+      - "false"
+      - auto
+  cache-dependency-glob:
+    type: list
+    separator: "\n"
+    list-item:
+      type: string
+  restore-cache:
+    type: boolean
+  save-cache:
+    type: boolean
+  cache-suffix:
+    type: string
+  cache-local-path:
+    type: string
+  prune-cache:
+    type: boolean
+  cache-python:
+    type: boolean
+  ignore-nothing-to-cache:
+    type: boolean
+  ignore-empty-workdir:
+    type: boolean
+  tool-dir:
+    type: string
+  tool-bin-dir:
+    type: string
+  manifest-file:
+    type: string
+  add-problem-matchers:
+    type: boolean
+  resolution-strategy:
+    type: enum
+    allowed-values:
+      - highest
+      - lowest
+
+outputs:
+  uv-version:
+    type: string
+  uv-path:
+    type: string
+  uvx-path:
+    type: string
+  cache-hit:
+    type: boolean
+  cache-key:
+    type: string
+  venv:
+    type: string