diff --git a/.github/actionlint.yml b/.github/actionlint.yml
new file mode 100644
index 0000000..709e0b8
--- /dev/null
+++ b/.github/actionlint.yml
@@ -0,0 +1,4 @@
+# actionlint 1.7.12 does not know this GitHub-hosted runner label yet.
+self-hosted-runner:
+  labels:
+    - ubuntu-26.04
diff --git a/.github/workflows/validate.yml b/.github/workflows/validate.yml
index 12ab6fc..3bdf115 100644
--- a/.github/workflows/validate.yml
+++ b/.github/workflows/validate.yml
@@ -56,7 +56,7 @@ jobs:
 
             while IFS= read -r changed_file; do
               case "${changed_file}" in
-                .github/workflows/*)
+                .github/actionlint.yml|.github/workflows/*)
                   github_actions_changed=true
                   ;;
               esac
diff --git a/README.md b/README.md
index 76fd8e2..c749f11 100644
--- a/README.md
+++ b/README.md
@@ -186,7 +186,7 @@ To receive structured wide events programmatically, pass an event sink:
 
 ```python
 events = src.InMemoryEventSink()
-src.Get(config, event_sink=events)   # or src.CallbackEventSink(my_function)
+src.Get(config, event_sink=events)  # or src.CallbackEventSink(my_function)
 ```
 
 To run fully disk-free (no generated YAML, snapshots, or log file), set