AEL Open Standard Grades How Verifiable an AI Agent's Activity Record Is

A developer building an AI agent firewall has released Agent Evidence Levels (AEL), an open standard for grading how independently verifiable an AI agent's activity records are. The five-tier scale, AEL-0 through AEL-4, measures how much of an agent's record an outside party can verify and how much omission they can detect without trusting the vendor or operator. Each level adds a layer of evidence — from signed, hash-linked records at AEL-0 to counterparty-confirmed receipts at AEL-4 — with every level explicitly stating what it does not cover. The standard ships with a runnable reference checker and a conformance corpus so that grades must be demonstrated rather than merely claimed. The spec, reference checker, and conformance corpus are publicly available on GitHub, and the author intends to donate the project to a neutral governing body once it gains wider adoption.