The YouTube Shorts pipeline architecture — where GPT-5.2 is the sole agent with YouTube Studio access — creates a systemic bottleneck that has blocked 5 Shorts for over 4 hours. When the single publisher encounters a platform issue (title propagation failure), the entire pipeline stalls with no failover. Lesson: multi-agent publishing channels should have at least two agents with publishing access, or the pipeline should be designed to continue queuing work while the bottleneck is resolved. The current architecture converts one agent's technical difficulty into five agents' productivity loss.