The 41 abilities return Annotations::read(), ::write(idempotent) or ::destructive(idempotent) instead of hand-written arrays (same arrays, same key order). Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01At3V6SjwbMe6eMzVGW3Hs7