next/kernel/actor_state.erl mirrors define_registry's structure: a
2-arity fold_fn that plugs into projection:start_link/3, an
Erlang-fun stand-in for the genesis actor-state.sx projection body.
State shape:
[{ActorId, Profile}, ...]
Profile is a property list with :type, :name, :preferredUsername,
:summary, :icon, :public_keys, :moved_to, :created. Maps #{} aren't
registered in this substrate, so this matches the kernel bucket /
registry shape convention.
Folding rules per design §9.1-§9.4:
- Create{Person|Service|Group}: register profile, capturing object
fields + :published seq as :created. Duplicate Create no-overwrite.
- Update{Person|Service|Group, patch}: deep-merge :patch into
profile last-write-wins per key.
- Move: record :moved_to.
Other activity types and non-actor object Creates pass through.
Local find_keyed/has_keyed/set_keyed helpers (same gap as Step 1a:
no lists:keyfind/keymember in this substrate).
19/19 in next/tests/actor_state_pure.sh covering:
- new/0/has/2/lookup/2/actors/1 base cases
- Create for Person/Service/Group all three actor types
- Profile field capture (name, preferredUsername, public_keys, created)
- Duplicate Create no-overwrite
- Two independent actors
- Update field merge + per-key last-write-wins
- Update for unknown actor pass-through
- Move :moved_to
- Non-actor Creates pass through
- Activities without :actor pass through
- fold_fn/0 returns is_function(F, 2)
Conformance 761/761. Step-2-adjacent no-regression gate 106/106
across 6 suites (define_registry_pure, projection_pure,
projection_server, nx_kernel_multi, bootstrap_start, smoke_app_pure).
Three new DefineObject artefacts in next/genesis/object-types/ for
the canonical actor object-types per design §9.1:
- Person: human-controlled identity (display name + handle + bio)
- Service: automated / programmatic actor (bot, feed, organisation)
- Group: multi-controller actor (member-set managed via Add/Remove)
Each is a small SX form with :name / :doc / :schema, identical
shape to existing object-types (note.sx, sx-artifact.sx etc) so the
existing bootstrap:populate_registry walk picks them up without
code changes. Manifest extended (object-types: 10 -> 13, total
entries: 31 -> 34).
Tests:
- genesis_parse.sh +7 cases (head form, :name, manifest membership);
57/57.
- Hardcoded counts bumped in bootstrap_read.sh, bootstrap_load.sh,
bootstrap_populate.sh, bootstrap_start.sh.
- bootstrap_build.sh 12/12 (bundle CID computed dynamically).
Conformance 761/761 preserved. 211/211 across 12 Step-2-adjacent
suites.
New gen_server exports add_actor/3, publish_to/2, log_tip_for/1,
actors/0, state_for/1, bucket_for/1, with_projections_for/2 —
each is a thin gen_server:call delegating to 1a's pure-functional
bucket API via fresh handle_call branches. Existing single-actor
calls (publish/1, log_tip/0, with_projections/1) route through
bucket 0 unchanged.
Per-actor mailbox sharding (one gen_server per bucket so distinct-
actor publishes don't serialise on a single mailbox) is forward-
looking — deferred to Step 4 where the per-actor HTTP routing makes
it actually load-bearing. Single-mailbox serialisation is fine for
Steps 1-3.
nx_kernel_multi.sh extended from 17 to 26 cases (gen_server load,
start_link bucket-0 seed, add_actor/3 dup detection, publish_to/2
per-actor isolation, interleaved publishes, no_actor error, state_for
+ with_projections_for round-trips). 134/134 across 12 nx_kernel-
adjacent + http suites. Erlang conformance 761/761 preserved.
State shape becomes [{actors, [{Id, Bucket}, ...]}, {next_actor_seq, N}]
with ActorBucket = [{key_spec, KS}, {actor_state, AS}, {log, L},
{projections, [Name]}, {next_published, N}]. Pure-functional multi-
actor APIs (new/0, add_actor/4, has_actor/2, actors/1, actor_count/1,
publish/3, per-actor accessors, with_actor_projections/3) join the
legacy single-actor accessors, which now read from the first bucket.
Every M1 test continues to pass via bootstrap:start/3 -> new/3 ->
first-bucket lookup.
Local has_keyed/find_keyed/set_keyed/set_bucket helpers cover the
keyed-list ops since lists:keymember/keyfind aren't registered in
this substrate.
next/tests/nx_kernel_multi.sh 17/17. M1 nx_kernel-adjacent suites
green (bootstrap_start 10/10, nx_kernel_server 11/11, http_publish
10/10, smoke_app_pure 12/12, http_post_format 13/13, http_publish_fold
10/10, http_marshal 10/10). Erlang conformance 761/761 preserved.
Blockers entry added for pre-existing http_server_tcp.sh 0/5
regression (78eae9ef left dead helper references in runtime.sx:1593) —
substrate-side, out of m2 scope, confirmed pre-existing by reverting
1a's changes and re-running.
