Cross-verifier failure-mode corpus for AI-agent evidence packages

Supporting data for the article "Freshness Is Not Authenticity: Cross-Verifier Failure Modes and a Layered Verdict Model for AI-Agent Evidence Packages" (Anton Sokolov, Tyche Institute). The article uses an open agent-attestation reference implementation (EATF / Agent Evidence Package) as the system under test. This is the sanitised evidence behind the quantitative results in Section 5: baseline conformance vectors; three full-stack export runs exposing a canonical-byte contract disagreement (a fresh, internally valid package fails independent offline verification while a timestamped ledger reports valid); a 29-case / 87-observation edge-forge mutation corpus with cross-verifier disagreement; an agent-card binding wave; a carrier-boundary bench; and a 100-row format census. Private hostnames, IP addresses, absolute local paths, and development credentials have been redacted; processed result tables, case definitions, checksums, and runner scripts are retained so the reported verdicts can be re-derived. See README.md for the file-to-table mapping.