diff --git a/.github/workflows/check-pull-request-labels.yaml b/.github/workflows/check-pull-request-labels.yaml
index 74fe2c5c845..fbcc7303afe 100644
--- a/.github/workflows/check-pull-request-labels.yaml
+++ b/.github/workflows/check-pull-request-labels.yaml
@@ -141,6 +141,11 @@ jobs:
               'performance:',  // To refactor to 'ci: ' in the future
               'run-tests:'     // Unused since GitLab migration
             ]
+            // Exact-match labels that don't fit a category prefix (e.g. labels applied
+            // by external automation tooling).
+            const exactAllowlist = [
+              'campaigner-automated-change'
+            ]
             // Re-fetch labels only if the previous step modified them (ex: "Bits AI" removal)
             let prLabels
             if (process.env.LABELS_STALE === 'true') {
@@ -156,7 +161,10 @@ jobs:
             // Look for invalid labels
             const invalidLabels = prLabels
               .map(label => label.name)
-              .filter(label => validCategories.every(prefix => !label.startsWith(prefix)))
+              .filter(label =>
+                !exactAllowlist.includes(label) &&
+                validCategories.every(prefix => !label.startsWith(prefix))
+              )
             const hasInvalidLabels = invalidLabels.length > 0
             // Get existing comments to check for blocking comment
             const comments = await github.rest.issues.listComments({