Composer::autoLabel is private (tested through compose()); the DiviComposition getters used only by tests are marked @internal; Limits::snapshotCount is documented as reserved; the ShortformWriter test seam is named $modulesForTests. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7