nx_room_red.nx

nx_room_red.nx -- X-ROOM (overseas-grade): sovereign DETERMINISTIC REDUNDANT AUDIO (RFC 2198 RED). Each packet piggybacks a COPY of an earlier packet's payload (offset back by `r`), so an isolated loss is recovered from the redundant copy carried `r` packets later -- no retransmit (fatal at 250ms overseas RTT), at the cost of extra bytes. Complements FEC: RED is cheap for sparse isolated loss; FEC covers bursts. RECOVERY: payload[i] is available iff packet i survived (primary) OR packet i+r survived (it carries payload[i] as its redundant copy). A burst longer than r leaves a hole (the honest limit -> that is where nx_room_fec takes over). EXCEED axis (honest) vs no-redundancy: deterministic recovery of isolated losses with ZERO retransmit + a TUNABLE offset (recovery span vs added latency), audit-replayable, sovereign. HONEST SCOPE: single-level RED (one redundant copy / offset r); multi-level RED + payload-size accounting = deeper rung. main() is the SELF-VALIDATING GATE. Evidence -> knowledge/status/room_red.log. license_tier: ORIGINAL