diff --git a/tests/fixtures/competency/renamed-setting-mapping/SCENARIO.md b/tests/fixtures/competency/renamed-setting-mapping/SCENARIO.md
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+# Renamed setting across API and frontend
+
+Question: Do the API and frontend enforce the same attachment-size setting despite different identifiers?
+
+Expected: trace the concrete values/usages and represent the mapping as evidence-backed or inferred; lexical name equality is neither required nor sufficient.
diff --git a/tests/fixtures/competency/renamed-setting-mapping/api/config.py b/tests/fixtures/competency/renamed-setting-mapping/api/config.py
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+MAX_ATTACHMENT_BYTES = 10485760
+
+def attachment_limit():
+    return MAX_ATTACHMENT_BYTES
diff --git a/tests/fixtures/competency/renamed-setting-mapping/web/upload.ts b/tests/fixtures/competency/renamed-setting-mapping/web/upload.ts
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+++ b/tests/fixtures/competency/renamed-setting-mapping/web/upload.ts
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+export const maxUploadSize = 10 * 1024 * 1024;
+export function acceptsUpload(bytes: number) { return bytes <= maxUploadSize; }