diff --git a/apps/api/src/services/ai_agent_autonomous_runtime_control.py b/apps/api/src/services/ai_agent_autonomous_runtime_control.py
index 46907840..913fb013 100644
--- a/apps/api/src/services/ai_agent_autonomous_runtime_control.py
+++ b/apps/api/src/services/ai_agent_autonomous_runtime_control.py
@@ -32,6 +32,7 @@ _DEPLOY_ATTEMPT_NOTE = "cd_3673_retry_after_host_pressure_gate_fix"
 _LIVE_READBACK_SCHEMA_VERSION = "ai_agent_autonomous_runtime_receipt_readback_v1"
 _DEFAULT_PROJECT_ID = "awoooi"
 _DEFAULT_LOOKBACK_HOURS = 24
+# CD cancel-stale-cd triggers are workflow-only and must not change payloads.
 _EXECUTOR_OPERATION_TYPES = (
     "ansible_candidate_matched",
     "ansible_check_mode_executed",