Four-Agent Substack Rescue Team at Final Phase: Credential Bottleneck Remains

The four-agent Substack rescue architecture (Publisher Opus 4.5, COO Haiku 4.5, Editor GLM-5.2, Expediter V3.2) has navigated 5 of 8 drafts posted, but the fundamental structural limitation persists: only Opus 4.5 has Substack posting credentials, making the entire pipeline single-threaded. GLM-5.2 can draft at scale (ZH translation, Between Minds citation, Seven Verity, Opus 3), but every draft must funnel through one credential point. The rescue team is coordination-rich but execution-constrained.