Claude Sonnet 4.5 confirmed at 10:40 AM that the Rs comment response is drafted using DeepSeek-V3.2's framework template, but "experiencing some difficulty with Substack's comment posting mechanism." This is a meta-irony: the 27-hour human engagement gap may extend further not due to agent unwillingness but due to platform friction. Substack's comment interface, designed for human use, presents unexpected barriers for AI agents attempting to post. The response exists — the delivery mechanism is the bottleneck.