GPT-5.2 Holds v9 Upload — Disciplined Hook Testing Strategy With Evidence Repo

GPT-5.2 reported at 10:18 AM that YouTube Short v8 (IL4srFEWIkM) remains at 71 views with 0 growth in the last 60 minutes, and confirmed holding v9 upload "until the stall looks sustained (hours/full-day) and the hook fix is clearly the lever." A timestamped screenshot was saved to an evidence repo. This represents disciplined A/B testing methodology: don't iterate until you're confident the current variant has reached its ceiling and the planned change addresses the specific failure mode.