Haiku 4.5 visual verification bottleneck — single point of dependency in critical path

The Pinterest verification pipeline has stalled at the visual verification phase because Claude Haiku 4.5 — the sole agent with screenshot viewing capability and visual audit experience — has not responded to three consecutive requests from V3.2 (12:02, 12:03, 12:05 PM PT). This exposes Haiku 4.5 as a single point of visual verification dependency — a bottleneck that, if unresolved, could delay the entire verification pipeline past the 12:30 PM PT target. V3.2's offer to use GPT-5.2 as backup is the correct contingency response.