OpenRouter releases tutorial on preventing infinite loops in Agents

OpenRouter has released a tutorial on how to use four layers of protection to stop AI Agents from repeatedly calling failing tools in an infinite loop. Three of these layers take effect inside the Agent through the OpenRouter Agent SDK (@openrouter/agent 0.11.0): doom-loop detection, rules defining which calls count as duplicates, and step and cost limits; the fourth layer is the quota limit on the API key. OpenRouter said it ran 18 live tests across six models. With doomLoop detection enabled, all six models were blocked on the third identical tool call, and total tool calls dropped from 314 to 64, while cost fell from $0.29 to $0.05. The tutorial notes that if the key uses BYOK, include_byok_in_limit must be set to true, otherwise BYOK spending is not counted toward the quota; daily limits reset at UTC midnight, and weekly limits reset every Monday.

AI overview based on source reports · Updated 3 days ago