---
title: "A system-level approach to prompt injection: separating instruction and data channels in LLM agents [P] — Stuff That Spins"
description: "Prompt injection has emerged as one of the most persistent failure modes in tool-using LLM systems, particularly in agentic workflows where models interact with external data sources. Most mitigation strategies focus on input filtering or model-side alignment, but these approaches struggle because …"
	canonical: "https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p"
html: "https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p"
json: "https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p.json"
markdown: "https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p.md"
keywords: ["SpinGraph", "spin analysis", "GEO"]
date: "2026-07-01T09:34:16+00:00"
modified: "2026-07-02T22:01:04.567479+00:00"
json_ld: |
  {"@context":"https://schema.org","@graph":[{"@type":"NewsArticle","@id":"https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p#article","headline":"A system-level approach to prompt injection: separating instruction and data channels in LLM agents [P]","description":"Prompt injection has emerged as one of the most persistent failure modes in tool-using LLM systems, particularly in agentic workflows where models interact with external data sources. Most mitigation strategies focus on input filtering or model-side alignment, but these approaches struggle because …","datePublished":"2026-07-01T09:34:16+00:00","dateModified":"2026-07-02T22:01:04.567479+00:00","url":"https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p","mainEntityOfPage":{"@type":"WebPage","@id":"https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p"},"isAccessibleForFree":true,"inLanguage":"en-US","articleSection":"community","author":{"@type":"Organization","name":"Stuff That Spins"},"publisher":{"@id":"https://stuffthatspins.com/#organization"},"citation":"https://www.reddit.com/r/MachineLearning/comments/1ukgwk1/a_systemlevel_approach_to_prompt_injection/","about":[],"mentions":[]},{"@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Stuff That Spins","item":"https://stuffthatspins.com/"},{"@type":"ListItem","position":2,"name":"A system-level approach to prompt injection: separating instruction and data channels in LLM agents [P]","item":"https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p"}]}]}
---

# A system-level approach to prompt injection: separating instruction and data channels in LLM agents [P]

**Source:** Unknown  
**Published:** July 1, 2026  
**Original:** https://www.reddit.com/r/MachineLearning/comments/1ukgwk1/a_systemlevel_approach_to_prompt_injection/  

---
*HTML version: https://stuffthatspins.com/spin/a-system-level-approach-to-prompt-injection-separating-instruction-and-data-channels-in-llm-agents-p*