nx_jpeg_tables_gate.nx

nx_jpeg_tables_gate.nx -- the referee for the decoder's table slots (debt 1789603770, 2026-09-16). T.81 B.2.4.2 names every DHT and DQT table and a later definition REPLACES it. The decoders appended tables by order of appearance into four slots, so a progressive file (one DHT per scan: ri_diora_baird_1 carries 7 tables over 6 scans, ri_diora_baird_4 ten over ten) wrote past the array (ARENA-OVERRUN prev_alloc_size=256 on every real decode) and a redefined table lost to its stale first definition. In-process teeth on hand-built payloads: slots are keyed by name, a redefinition wins, twelve definitions leave the slot count at eight, an undefined name reads absent, a class the standard lacks is refused by name and places nothing. End-to-end teeth on two mirrored progressive stills: the decode agrees with an OUTSIDE decoder (libjpeg-turbo through OpenCV 5.0.0 on the laptop, 2026-09-16) on the channel means -- the liar-killer no in-process tooth can supply; that decoder never enters a build or run path, only its numbers do. Values are printed with gv_kv. license_tier: ORIGINAL No hw writes (Rule 26).