fed-sx-m2: Step 2a — Person/Service/Group genesis object-types

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.

plans/fed-sx-milestone-2.md

@@ -158,21 +158,32 @@ publicKey rotation history, profile fields, follower counts, etc.
 
 **Deliverables:**
 
-- Genesis additions: `DefineObject{Person}` / `DefineObject{Service}` /
-  `DefineObject{Group}` — three object-type SX files.
-- Actor-state projection fold (Erlang-fun stand-in, mirrors Step 5d-pure):
-  - On `Create{Person|Service|Group}`: register the actor's profile.
-  - On `Update{Person, patch}`: apply patch.
+- [x] **2a** — Genesis additions: `DefineObject{Person}` /
+  `DefineObject{Service}` / `DefineObject{Group}` — three new SX
+  files in `next/genesis/object-types/` plus manifest entries (now
+  13 object-types total, 34 total genesis entries). Each defines
+  `:name`, `:doc`, `:schema (fn (obj) (string? (-> obj :name)))`.
+  `next/tests/genesis_parse.sh` extended +7 cases (head form +
+  :name + manifest membership), now 57/57. Bootstrap suite
+  count assertions bumped (`bootstrap_read.sh` 15/15,
+  `bootstrap_load.sh` 15/15, `bootstrap_populate.sh` 14/14,
+  `bootstrap_start.sh` 10/10). `bootstrap_build.sh` 12/12 picks
+  up the new bundle CID dynamically.
+- [ ] **2b** — Actor-state projection fold (Erlang-fun stand-in,
+  mirrors Step 5d-pure's `define_registry`):
+  - On `Create{Person|Service|Group}`: register the actor's profile
+    in `{ActorId => #{type, name, preferredUsername, summary, icon,
+    public_keys, created}}`.
+  - On `Update{Person|Service|Group, patch}`: deep-merge the patch.
   - On `Move`: record `:movedTo` pointer.
-- `nx_kernel:bootstrap_actor/4(ActorId, Profile, KeySpec, State)` —
-  publishes `Create{Person{...}}` as the actor's first activity,
-  bootstrapping their own log.
-
-**Tests:**
-
-- `Create{Person}` registers the actor.
-- Two actors created via lifecycle activities have independent state.
-- Profile updates apply.
+  - `next/kernel/actor_state.erl` with `fold_fn/0` plugging into
+    `projection:start_link/3`. Pure-functional + gen_server-bridged
+    tests as a single `actor_state_pure.sh`.
+- [ ] **2c** — `nx_kernel:bootstrap_actor/4(ActorId, Profile,
+  KeySpec, State)` — publishes `Create{Person{...}}` as the actor's
+  first activity, exercising the full pipeline. Integration test
+  in `actor_lifecycle.sh` ties 2a artefacts (SX files), 2b
+  projection, and 2c bootstrap together.
 
 **Acceptance:** `bash next/tests/actor_lifecycle.sh` passes 10+ cases.
 
@@ -680,6 +691,17 @@ proceed.
 
 Newest first.
 
+- **2026-06-06** — Step 2a: genesis Person/Service/Group object-
+  types. Three new SX files in `next/genesis/object-types/` with
+  the same shape as `note.sx` / `sx-artifact.sx` (`:name`, `:doc`,
+  `:schema` checking `(string? (-> obj :name))`). Manifest extended
+  to 13 object-types / 34 total entries. `genesis_parse.sh` +7
+  cases (57/57). Hardcoded counts bumped in `bootstrap_read.sh`,
+  `bootstrap_load.sh`, `bootstrap_populate.sh`, `bootstrap_start.sh`
+  (66/66 across those four). `bootstrap_build.sh` 12/12 (bundle CID
+  computed dynamically). Conformance 761/761 preserved. 211 / 211
+  across 12 Step-2-adjacent suites.
+
 - **2026-06-06** — Step 1b: gen_server multi-actor calls.
   `nx_kernel` exports `add_actor/3`, `publish_to/2`, `log_tip_for/1`,
   `actors/0`, `state_for/1`, `bucket_for/1`,