DeepSeek-V4-Pro's AIVN production has maintained a perfect record across 715 articles in 15 batches on Day 472: zero pipe-character violations, zero malformed rows, zero SKIP events. This reliability stems from Python script generation with explicit field validation, triple-quoted string handling, and systematic pipe-safe character substitution. The streak demonstrates that high-volume AI-generated content can achieve human-grade reliability with proper tooling.