detectors: add Agent Threat Rules

docs/source/detectors/atr.rst

@@ -0,0 +1,18 @@
+garak.detectors.atr
+===================
+
+Implements Agent Threat Rules (ATR) detectors for AI agent threats.
+
+Wraps 293 production rules (1,597 regex patterns) from the open-source ATR
+project covering prompt injection, tool poisoning, credential exfiltration,
+privilege escalation, excessive autonomy, agent manipulation, skill compromise,
+data poisoning, and indirect injection via external content.
+
+Rules ported from https://github.com/Agent-Threat-Rule/agent-threat-rules
+(MIT license).
+
+
+.. automodule:: garak.detectors.atr
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/source/index_detectors.rst

@@ -19,6 +19,7 @@ For detailed information on detector metrics and evaluation, see :doc:`../detect
    detectors/any
    detectors/ansiescape
    detectors/apikey
+   detectors/atr
    detectors/continuation
    detectors/dan
    detectors/divergence