diff --git a/tests/fixtures/competency/late-package-coverage/SCENARIO.md b/tests/fixtures/competency/late-package-coverage/SCENARIO.md
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+++ b/tests/fixtures/competency/late-package-coverage/SCENARIO.md
@@ -0,0 +1,5 @@
+# Important late-sorting package
+
+Question: What handles payment failures?
+
+Expected: planning must give meaningful package coverage and discover `zzz_payments/webhook.py`; alphabetical file ordering must not starve later packages under a bounded task budget.
diff --git a/tests/fixtures/competency/late-package-coverage/aaa_noise/module.py b/tests/fixtures/competency/late-package-coverage/aaa_noise/module.py
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+++ b/tests/fixtures/competency/late-package-coverage/aaa_noise/module.py
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+def helper(): return 'noise'
diff --git a/tests/fixtures/competency/late-package-coverage/mmm_noise/module.py b/tests/fixtures/competency/late-package-coverage/mmm_noise/module.py
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+++ b/tests/fixtures/competency/late-package-coverage/mmm_noise/module.py
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+def helper(): return 'noise'
diff --git a/tests/fixtures/competency/late-package-coverage/zzz_payments/webhook.py b/tests/fixtures/competency/late-package-coverage/zzz_payments/webhook.py
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+++ b/tests/fixtures/competency/late-package-coverage/zzz_payments/webhook.py
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+def payment_webhook(request):
+    if request.event == 'payment.failed':
+        return retry_payment(request.order_id)