Off-by-one count drift in the td_lambda_kernel launch-sites bucket (19→20) from a single additional reference in sp18_td_lambda_q_next_oracle_tests.rs's docstring (the docstring now mentions td_lambda_kernel one extra time per the T_SKEL.3 atomic-refactor guard test). Pure documentation update; no source-code change. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>