Spending Limits for LangGraph Agents That a Prompt Injection Can't Talk Past
This story is from 2026-10-04. It is preserved in the archive; the latest stories are on the live feed.
Short answer: a spending limit written into a LangGraph agent's system prompt ("never spend more than $500") is a suggestion, not a control. Any text the agent reads, including a scraped invoice or an email, can contain a competing instruction, and the model has no way to know which one is authorit…
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- 2026-10-04 16:32 · DEV Community — AI
Spending Limits for LangGraph Agents That a Prompt Injection Can't Talk Past