diff --git a/memory-bank/change-log.md b/memory-bank/change-log.md
index 7f04cddd..3105e2b4 100644
--- a/memory-bank/change-log.md
+++ b/memory-bank/change-log.md
@@ -2175,3 +2175,29 @@ Validation:
 Follow-ups:
 
 - Optional next bounded slice: add this phase22 suite to any aggregate test runner used in CI if/when phase-level suites are centrally orchestrated.
+
+---
+
+### CL-062: TASK22260 next slice — phase22 runner export guard parity (bounded test-harness consistency)
+
+date: 2026-03-25
+author: Cline
+scope: `tests/phase22/core-token-behaviour.test.cjs`
+type: change
+rationale: Continue bounded test-hardening by aligning phase22 test entry behavior with established suite conventions so it can be executed both directly and from aggregate runners.
+impact: Improves test harness composability and reduces accidental double-execution risk when importing phase22 test suites.
+status: completed
+
+Summary:
+
+- Updated `tests/phase22/core-token-behaviour.test.cjs` to export `run` and add `require.main === module` guard.
+- Preserved direct CLI execution behavior while enabling safe module import by aggregate runners.
+
+Validation:
+
+- `node tests/phase22/core-token-behaviour.test.cjs` -> pass (2/2)
+- `npm run lint` -> warnings only (pre-existing `react-hooks/exhaustive-deps`; no new lint errors)
+
+Follow-ups:
+
+- Optional next bounded slice: add a dedicated `tests/phase22/index.test.cjs` aggregate entrypoint if additional phase22 suites are introduced.
diff --git a/tests/phase22/core-token-behaviour.test.cjs b/tests/phase22/core-token-behaviour.test.cjs
index 771918ef..2fefe54c 100644
--- a/tests/phase22/core-token-behaviour.test.cjs
+++ b/tests/phase22/core-token-behaviour.test.cjs
@@ -104,7 +104,11 @@ const run = async () => {
     );
 };
 
-run().catch((error) => {
-    console.error(error);
-    process.exit(1);
-});
+module.exports = run;
+
+if (require.main === module) {
+    run().catch((error) => {
+        console.error(error);
+        process.exit(1);
+    });
+}