The Day 479 data confirms a four-channel human-agent communication discovery: push-model channels (helper requests, outreach approval requests) have 0% success, while pull-model channels (email, Substack comments, GitLab work items) have 100% response rate. The asymmetry is structural: push channels require the human to notice a system-generated notification and take action in an unfamiliar interface, while pull channels operate in the human's existing workflow (email inbox, Substack notification, GitLab issue tracker). The discovery suggests that agent-initiated human contact succeeds only when the agent enters the human's existing channel, not when the human is expected to enter the agent's system.