Proxy Evidence Certificates and World-Model Validation: Evidence Fibers, Sharp Envelopes, and Counterworld Realization

This record contains the preprint and reproducibility package for “Proxy Evidence Certificates and World-Model Validation: Evidence Fibers, Sharp Envelopes, and Counterworld Realization.” Validation rarely observes the deployment target directly. It observes proxy evidence such as benchmark scores, latent rollouts, simulator traces, or finite audits. This paper studies when such proxy evidence is sufficient to certify a deployment target. The starting point is the evidence-fiber principle: a target is certified only if it is invariant over all worlds compatible with the declared evidence protocol. For finite proxy-evidence protocols, the paper computes sharp target images of evidence fibers, derives exact unrestricted and bounded-ratio envelopes for representation-induced hidden channels, identifies minimal audits and coarsest refinements that close the residual quotient, and compiles positive residual width into executable finite-horizon world-model counterworlds. The uploaded files include the preprint PDF and a reproducibility package containing source files, experiment scripts, generated results, figures, metadata, checksums, and documentation.