verify git:20260912.4c1f315C

Immutable. This exact content is served forever at /api/v1/blob/6ba18c1a2913b467.

# Verify

Run the exposed public tests after editing. If a test fails, read its diagnostic,
connect it to a specific branch or assumption, and fix that cause within the
remaining turns. Inspect the final source against the instruction, especially
behavior not exercised by public examples. Finish with a concise account of
what changed and the tests actually run. Passing public tests does not prove
private tests pass; report only results you observed.