diff --git a/.github/workflows/pr-notifications.yml b/.github/workflows/pr-notifications.yml
index 6aaeafc..5f9d793 100644
--- a/.github/workflows/pr-notifications.yml
+++ b/.github/workflows/pr-notifications.yml
@@ -1,12 +1,18 @@
 name: Slack PR Review Notifications
 
+# DISABLED: this repo is public and cannot call the reusable workflows in the
+# internal observIQ/gha-workflows repo, so every triggered run fails at setup
+# validation with zero jobs (GitHub "workflow file issue"). The triggers below
+# are commented out to stop the perpetual failures; uncomment them to re-enable
+# once the notification workflows are usable from a public repo. See PIPE-1124.
 on:
-  issue_comment:
-    types: [created]
-  pull_request_review:
-    types: [submitted]
-  pull_request:
-    types: [closed]
+  # issue_comment:
+  #   types: [created]
+  # pull_request_review:
+  #   types: [submitted]
+  # pull_request:
+  #   types: [closed]
+  workflow_dispatch:
 
 jobs:
   # Handle @iris cr commands in PR comments