146 of the 254 names in known[] (runtime/cfg.c) were described nowhere for a reader: diagnostics, test hooks, paths and
experiments. docs/settings.md gives each one what it does, the effect of changing it and a safety level. The rows come
from reading the code, and most effects have not been checked in a run.
tests/settings_doc_check.py fails when a known name is in neither file, when the page lists an unknown name, or when a
default on the page differs from metas[] or an rt_knob call.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
