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@@ -112,6 +112,7 @@ Join the Sigma community on [Discord](https://discord.gg/UcDN25s8) to discuss de
 * [alterix](https://github.com/mtnmunuklu/alterix) - Converts Sigma rules to the query language of CRYPTTECH's SIEM
 * [AttackIQ](https://www.attackiq.com/2024/01/10/sigmaiq-attackiqs-latest-innovation-for-actionable-detections/) - Sigma Rules integrated in AttackIQ's platform, and [SigmAIQ](https://github.com/AttackIQ/SigmAIQ) for Sigma rule conversion and LLM apps
 * [Atomic Threat Coverage](https://github.com/atc-project/atomic-threat-coverage) - Automatically maps Sigma rules to MITRE ATT&CK techniques, Atomic Red Team tests, and incident response playbooks (since December 2018)
+* [ATR (Agent Threat Rules)](https://github.com/Agent-Threat-Rule/agent-threat-rules) - Open MIT-licensed detection rule format for AI agent security threats (prompt injection, tool poisoning, context exfiltration). Reference CLI exports ATR rules to Sigma format via `atr convert sigma`.
 * [AttackRuleMap](https://attackrulemap.com/) - Maps Atomic Red Team attack simulations to open-source Sigma detection rules for coverage assessment
 * [Confluent Sigma](https://github.com/confluentinc/confluent-sigma) - Kafka Streams supported Sigma rules
 * [Detection Studio](https://detection.studio/?ref=sigmahq_readme) - Convert Sigma rules to any supported SIEM