Downstream-author fieldtest of the #300 surface, public interface only,
real GER40 archive. All four axes hold: the closed
generate -> show -> hand-extend -> re-register -> run loop (2-cell
extended campaign), the typed stop grammar's clap rejections, bare
plateau's content-id identity with plateau:mean, and the show read-back
(byte-identical, no framing) with a clean unknown-id refusal.
Findings routed: 1 bug (show outside a project blames the id instead of
the missing Aura.toml — RED-first fix follows), 2 friction items filed
to the tracker (opaque process-document select refusal; no prefix-id
hint on show), 4 working (carry-on). The fieldtest spec survives
git-ignored as the next planning cycle's reference input.
refs #300
claude
63711a1d3a