# AI Cyber Challenge The AI Cyber Challenge was a DARPA and ARPA-H competition aimed at autonomous discovery and repair of vulnerabilities in critical-infrastructure software. ## Significance The article treats AIxCC as a demonstrated component of [[AI Immune Systems]]: cyber-reasoning systems can inspect large software bases, identify vulnerabilities, and generate repairs at machine speed. ## Boundary A competition result is not proof of universal autonomous defense. Performance depends on software language, build environment, vulnerability class, validation, patch safety, and operational integration. Human review and provenance remain necessary. ## Relationships [[Software Supply-Chain Provenance]] · [[Software Composition Analysis]] · [[DARPA]] · [[AI Immune Systems]]. ## Source [[articles/Cognitive-Cyber Warfare Measures and Countermeasures#DARPA and IARPA Research Leads|Cognitive-Cyber Warfare — AIxCC]].