{"type": "article", "title": "The System Prompt Illusion: How Instruction Preambles Modify Computation in Language Models", "publisher": "Web Pulse", "url": "https://wpnews.pro/news/the-system-prompt-illusion-how-instruction-preambles-modify-computation-in", "original_source": "https://arxiv.org/abs/2609.38205", "published": "2026-10-01T04:00:00+00:00", "accessed": "2026-10-01", "id": "the-system-prompt-illusion-how-instruction-preambles-modify-computation-in"}