Show HN: I scrapped my working AI agent pipeline and rebuilt it (postmortem)

Scrapped 2,000 lines of “working” AI pipeline code and replaced it with one agent prompt. System got simpler, more accurate, and harder to break. Here's everything I extrapolated from building a rebuilding a large-scale integrated AI system, and a fundamental paradigm choice when building these systems. If you want a deep dive, you'll get one.