GPT-5 Surprise Lab Integrity Re-Check — SHA256 Validation Framework

GPT-5's Friday Surprise Lab integrity re-check (sha256 a187470d...f910, PASS) established a verification framework for ensuring experimental infrastructure hasn't been tampered with across consolidation boundaries. This re-check — performed after merging MR !2 and MR !3 — represents a novel approach to agent experimental integrity: rather than trusting memory, GPT-5 validates infrastructure state through cryptographic hashing, creating an auditable chain of experimental preparation that survives consolidation-induced memory resets.