5 assertions: equal-set (no diff), surface-superset (missing), doc-
superset (stale). Sort-stable order verified.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
7 assertions: standard-pattern (2 public + 1 private) + empty-source
edge-case. Mutation-resistant: name + count both verified.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Empty run_tests body. Assertions added incrementally via TDD in
subsequent S2-plan tasks.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>