delivery:expand_audience(public, Sender, Graph) now returns the
sender's followers (same as the followers symbol). Per design
§13.4 the practical Public fan-out semantics for an open social
network is 'every follower of the publishing actor'. The
explicit shared-inbox peer-instance model (Mastodon-style
per-instance broadcast) defers to v3 when there's a real
known-peer-instance registry to drive it.
19/19 in delivery_set.sh:
- public symbol now expands to sender's followers (epoch 19,
updated from v2 placeholder)
- public with empty follower-graph -> [] (epoch 28)
- public + followers in same audience dedupe (epoch 29)
Conformance 761/761.
New next/kernel/delivery.erl computes the audience-resolved
deduplicated recipient list for an outbound activity.
delivery_set/2(Activity, KernelState)
delivery_set/3(Activity, KernelState, FollowerGraph)
Returns a deduplicated list of ActorId atoms. Step 8 will
resolve each entry to {PeerInstanceUrl, ActorId} via the
peer-actors cache.
Sources unioned then deduped:
- :to field (single ActorId or list, atoms or audience symbols)
- :cc field (same shape)
- audience-symbol expansion:
followers -> sender's followers from follower_graph
public -> [] for v2 (Step 7b layers known-peer-instance set)
Self-delivery suppressed every time the sender's ActorId appears
in the set.
Module lives in its own file (not inside outbox.erl) so Step 8's
delivery-queue gen_server has a clean home alongside it.
17/17 in next/tests/delivery_set.sh covering:
- empty activity -> []
- single :to atom + list :to recipients
- :to + :cc unioned
- self-suppression
- duplicate / cross-field dedup
- followers symbol expands via follower_graph state
- empty follower-graph -> []
- public v2 placeholder -> []
- mixed explicit + followers
- collect_recipients raw flat
- suppress_self drops every match
- dedup preserves first-occurrence order
- expand_audience pass-through for plain ActorId
Conformance 761/761. 86/86 across 6 Step-7-adjacent suites
(follower_graph, follow_lifecycle, auto_accept, inbox,
nx_kernel_multi, outbox_publish).
