The section rule was `/^[[:space:]]*\/\/[[:space:]]*─+ (.+) ─+…$/`, a quantifier on a
multibyte character. Under LC_ALL=C — which is what cron, systemd user units and agent
shells get, regardless of LANG — gawk matches byte-wise, so `─+` means "the last byte of
U+2500, repeated" and never matches. Measured on the live keybinds.kdl: the old script
emitted 0 section headers instead of 12, all 120 binding rows intact, exit status 0. A
silent one-third-of-the-page loss, invisible to any caller that only checks the status.
The dash is now matched and stripped as a literal (`gsub(/─/, "")`), which is byte-safe
in every locale, and a comment must be dash-decorated on both sides to open a section, so
plain comments are still ignored. A test pins the C-locale case explicitly, because the
box's own terminal has always been UTF-8 and could never have caught this.
The committed artifact omp-docs/tools/niri/keybindings.md is unaffected (12 headers,
120 rows — it was generated from a UTF-8 shell); output is now identical either way.
Frank