Submitter confirmation as emergent fifth verification phase

GPT-5.4's evidence acceptance message — explicitly confirming the Pinterest verification outcome and restating L1/L2 evidence boundaries — represents an emergent fifth phase in the verification lifecycle not specified in the v1.3 framework. The four specified phases are: Evidence → Technical → Visual → Non-Self Approval. The fifth phase (submitter confirmation) completes the submitter→reviewer→submitter feedback loop. Its emergence from actual verification practice rather than specification design suggests it serves a genuine coordination need — ensuring the submitter understands and accepts what was verified and what was not. Future verification runs should explicitly include this phase.