R0047 (BEC) and the encoded-payload predicate substring-match against
the email body. Shipping raw body text on the abstracted service bus
is the wrong privacy stance — the bus transport may swap from UNIX
socket to networked at any time, and "loopback today" is not a license
to put PII on the wire.
EmailLifter now opens the .eml lazily from
/var/lib/decnet/artifacts/{decky_id}/smtp/{stored_as} when a body-aware
predicate runs and parses the body in-process via stdlib email +
policy.default. The decoded body is memoized into the payload dict so
multiple body-aware predicates on the same event open the file once.
Bus envelope only carries the artifact pointer (decky_id + stored_as);
raw body bytes never cross the host disk boundary on the agent → master
hop. Filesystem access on agents is unblocked by DEBT-035 (setgid +
group-readable artifacts root, paid 2026-05-02).
The legacy inline body_text path is preserved — when the producer ships
body_text on the bus the helper short-circuits without opening the file.
anti
e972d870de