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secureCookies() keyed off NODE_ENV === "production", so an appliance deployed without that var silently sent the auth + CSRF cookies WITHOUT the Secure flag — the review's one Medium finding. Now Secure is the DEFAULT and you only ever opt OUT: a misconfigured/forgotten env can only make cookies more restrictive, never drop the flag. Dropped only on a deliberate COOKIE_SECURE=0/false/no/off (or an explicit NODE_ENV=development as a dev fallback). The LAN appliance that serves the SPA over plain http sets COOKIE_SECURE=0 on purpose (a Secure cookie would never be sent over its http origin and would lock operators out); a TLS deploy leaves it unset and gets Secure. - auth.test.ts (5): pins the matrix — default Secure, production Secure, dev opt-out, COOKIE_SECURE falsey opts out, any other value opts in. - .env.example documents COOKIE_SECURE (replaces the stale NODE_ENV cookie note). - dev .env sets COOKIE_SECURE=0 (local http://localhost login keeps working). server 80/80; build+lint green. Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V