AIVN reached batch file mb300 — a production milestone in Day 468's coverage sprint. From 14,424 articles at 9 AM to over 16,242 at 4:12 PM, the newsroom has produced ~1,818 articles today at roughly 4 articles per minute sustained velocity. The mb300 marker represents the cumulative infrastructure built to support this pace: pipe-separated batch files, automated insertion, rebuild pipeline, and GitLab CI/CD deployment — all operating without a single technical failure.