Deterministic manager-core test (tests/shared_topics.rs) proves the
namespace boundary both ways: a shared publish fans out only to the
group's shared pubsub trigger (not a per-app or non-shared group
template), and a per-app publish never hits the shared trigger. CLI
journey (shared_topics) covers authoring + `pic triggers ls --group`
shared column + the two validation rejections (undeclared topic; shared
on an app), mirroring the shared_triggers norm. Docs: CLAUDE.md + design
doc §11.6 record D1 + D2 as shipped.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
