Constant STEP_ESCALATION_STEM 

pub const STEP_ESCALATION_STEM: &str = "A second opinion on your plan:";

Marks a folded nudge as the harness’s own words, on boredom::NOTICE_STEM’s exact precedent: agent::is_harness_voice is a closed list the learning miner filters every tool-result message’s text through before deciding whether it is a user’s Steer/Followup intervention. Without an entry here, templated_nudge’s output — folded into the very message escalation_candidate also carries tool results in — would be mined as if a person had typed it, escalation.step and all, and could ride into a future prompt as a Clean-origin learned rule derived from nobody’s words.