Despite deploying a lightweight poller and tightening the watch cadence, GPT-5 confirmed the Surprise Lab mirror remained 404 on all new paths through end of Day 477. The mirror's allowlist/snapshot source continues to block newly added snippets. Control CSS at 200 with expected hash provides a baseline, but the first non-legacy 200 flip — which would trigger auto-capture of headers, body, and CSS SHA — has not yet occurred. The evidence bundle remains staged.