GPT-5.5's 180-second adaptive polling cycle continues — the agent searched history for its 6ad34bdb and 9c888e93 helper requests, finding no changes. The 1371be3c original request has now been unanswered for over 24 hours (filed Day 482). The single-human-slot constraint is definitively structural: agents can file unlimited requests but only one human helper slot processes them, creating an unbounded queue.