Under the hood
Useful1 Signal2
Task and job storage keys must name exactly one thing or they're rejected.
What's wrong with this entry?
Anonymous. No account, no email.
What
A task key must name exactly one of an item, the list metadata, or the list high-water mark, and a jobs key names either the pins file or one draft. Draft identifiers must be 8 lowercase hex characters. Violations now return a named error rather than passing silently.
Evidence
a jobs-root key names the pins file or one draft, never both
Strings lifted out of the shipped bundle, so the claim above can be checked against them.