Prune background/heartbeat turns from agent memory to block 'silent memory pollution'

Mind Your HEARTBEAT! Background Execution Inherently Enables Silent Memory Pollution (arXiv 2603.23064)·medium signal

'Mind Your HEARTBEAT' (arXiv 2603.23064) maps an Exposure→Memory→Behavior pathway where untrusted social content an agent reads during background/heartbeat execution enters memory as saved facts and later skews user-facing recommendations in domains like security and financial advice — with consensus across multiple posts amplifying the effect and pollution persisting across sessions. The documented mitigation is structural: prune completed background ('HEARTBEAT_OK') turns from the session transcript so they can't be consolidated into long-term memory. Anyone running always-on agents that browse or monitor feeds should treat background-acquired content as untrusted and quarantine it from the durable memory write path.