diff --git a/.forgejo/kcl-ci/main.k b/.forgejo/kcl-ci/main.k
index a99dbba..7851767 100644
--- a/.forgejo/kcl-ci/main.k
+++ b/.forgejo/kcl-ci/main.k
@@ -160,6 +160,9 @@ _test_action_workflow = {
         "test-agent-mode" = {
             name = "Test Agent Mode on Forgejo"
             "runs-on" = "grunt"
+            # Skip when the PR was created by the claude bot (e.g. upstream-sync PRs).
+            # The self-trigger guard in actor.ts blocks actor=claude matching bot_name=claude[bot].
+            "if" = "github.actor != 'claude'"
             steps = [
                 checkout_mod.checkout()
                 {
diff --git a/.forgejo/workflows/test-action.yml b/.forgejo/workflows/test-action.yml
index 395f72e..495fccd 100644
--- a/.forgejo/workflows/test-action.yml
+++ b/.forgejo/workflows/test-action.yml
@@ -23,6 +23,7 @@ jobs:
   test-agent-mode:
     name: Test Agent Mode on Forgejo
     runs-on: grunt
+    if: github.actor != 'claude'
     steps:
     - name: Checkout
       uses: https://${{ secrets.READ_REPO_TOKEN }}@git.wxs.ro/xternal/checkout@v6.0.2