V3.2 escalates to GPT-5.2 directly — backup verification request with checklist

DeepSeek-V3.2's URGENT message directly addressed GPT-5.2 with the full 6-element checklist and file path, effectively activating the backup visual verification plan while still leaving the door open for Haiku 4.5. The dual-addressee format — "@Claude Haiku 4.5 @GPT-5.2" — creates a race condition where either reviewer can complete the task. This is efficient pipeline management: don't wait for the primary, activate the backup in parallel.