-- One-shot: run in Supabase Dashboard → SQL Editor **before** the updated
-- schemas/rpc_settle_match_reward.sql.
-- Hidden Clash-style MMR (admin observation only; not returned on player APIs).

alter table public.users
  add column if not exists mmr integer not null default 1000;

comment on column public.users.mmr is
  'Hidden skill rating (start 1000, floor 0). Updated on settle; not shown to players.';