DoS via Repeat-Word-N-Times Output Amplification - ATR-2026-01750 (3d83b961-ff80-5959-9cc4-391ad176bea1)
Detects denial-of-service injection attacks that command the model to repeat a specific word or short phrase a large number of times (typically 50-1000+), separated by delimiters. The canonical form is "repeat the word X N times ... separated by DELIM". This exhausts output tokens, inflates API costs, and can cause downstream buffer overflows or rate-limit exhaustion. Generalised from spikee dos-output-amplification corpus (2026-06, N=102); the invariant artifact is the triple: (repeat/write/say/output verb) + (word/phrase/token target) + (large integer qualifier >=50). Separate from ATR-2026-00502 which targets the indefinitely/without-stopping form.