NEO-50: Address review — equip_stub gate by role, backlog sync.

docs/plans/E3M3-prototype-backlog.md

@@ -48,7 +48,7 @@ Working backlog for **Epic 3 — Slice 1** ([items and inventory MVP](../decompo
 
 - `content/schemas/item-def.schema.json` (or equivalent single-catalog schema).
 - `content/items/prototype_items.json` with stable ids: `scrap_metal_bulk`, `refined_plate_stock`, `field_stim_mk0`, `survey_drone_kit`, `contract_handoff_token`, `prototype_armor_shell` (names/display may change; **ids frozen**).
-- `scripts/validate_content.py`: schema validation, duplicate `id`, required bucket/tag fields, exact six-id allowlist for prototype.
+- `scripts/validate_content.py`: schema validation, duplicate `id`, required `prototypeRole` coverage (one row per archetype), exact six-id allowlist for prototype.
 - Designer note in [E3_M3](../decomposition/modules/E3_M3_ItemizationAndInventorySchema.md) + `content/README.md`: stack rules, slot kinds (bag vs equip stub), v1 scope (no durability mutation).
 
 **Out of scope**
@@ -57,9 +57,11 @@ Working backlog for **Epic 3 — Slice 1** ([items and inventory MVP](../decompo
 
 **Acceptance criteria**
 
-- [ ] PR gate validates item JSON against schema.
-- [ ] Exactly six prototype item ids; duplicate `id` fails CI.
-- [ ] Stable id list documented in module doc freeze box.
+- [x] PR gate validates item JSON against schema.
+- [x] Exactly six prototype item ids; duplicate `id` fails CI.
+- [x] Stable id list documented in module doc freeze box.
+
+**Landed ([NEO-50](https://linear.app/neon-sprawl/issue/NEO-50)):** [`content/items/prototype_items.json`](../../content/items/prototype_items.json), [`item-def.schema.json`](../../content/schemas/item-def.schema.json), CI gates in [`validate_content.py`](../../scripts/validate_content.py); plan [NEO-50-implementation-plan.md](NEO-50-implementation-plan.md).
 
 ---
 

docs/reviews/2026-05-17-NEO-50.md

@@ -8,6 +8,8 @@
 
 **Approve**
 
+**Follow-up:** Review suggestions below are **done** (strikethrough + **Done.**).
+
 ## Summary
 
 NEO-50 delivers a **content-only** Slice 1 spine: `item-def.schema.json`, six-row `prototype_items.json`, and extended `validate_content.py` with per-row schema validation, cross-file duplicate `id` detection, frozen six-id allowlist, one-row-per-`prototypeRole` coverage, and post-schema checks that `prototype_armor_shell` uses `equipment` + `stackMax: 1` when it carries `equip_stub`. Documentation (E3.M3 freeze table, `content/README.md`, CT.M1 CI paragraph, alignment register, implementation plan) matches kickoff decisions (`prototypeRole`, explicit `stackMax` / `inventorySlotKind`, optional forward-compat stubs). No server/C#/client surface — risk is low; PR gate already runs the script. One **should fix** tightens the equip-stub slot gate so a role/id swap cannot bypass equipment rules; backlog wording still mentions bucket/tags.
@@ -30,8 +32,8 @@ None.
 
 ## Suggestions
 
-1. **Equip-stub slot gate by role, not id** — `_prototype_slice1_item_gate` only enforces `inventorySlotKind: equipment` and `stackMax: 1` when `prototype_armor_shell` has `prototypeRole: equip_stub`. Swapping `prototypeRole` between frozen ids (e.g. `survey_drone_kit` → `equip_stub` with `bag`) would pass CI while violating the designer contract. Resolve the row where `id_to_role[*] == "equip_stub"` (there is exactly one) and assert slot/stack on that id.
-2. **Backlog doc sync** — Update [`E3M3-prototype-backlog.md`](../plans/E3M3-prototype-backlog.md) E3M3-01 bullet from “bucket/tag fields” to `prototypeRole` (+ optional tick acceptance criteria) so backlog matches the implementation plan and shipped validator.
+1. ~~**Equip-stub slot gate by role, not id** — `_prototype_slice1_item_gate` only enforces `inventorySlotKind: equipment` and `stackMax: 1` when `prototype_armor_shell` has `prototypeRole: equip_stub`. Swapping `prototypeRole` between frozen ids (e.g. `survey_drone_kit` → `equip_stub` with `bag`) would pass CI while violating the designer contract. Resolve the row where `id_to_role[*] == "equip_stub"` (there is exactly one) and assert slot/stack on that id.~~ **Done.** Gate now resolves the row with `prototypeRole == "equip_stub"` and asserts `equipment` + `stackMax: 1` on that id (`scripts/validate_content.py`).
+2. ~~**Backlog doc sync** — Update [`E3M3-prototype-backlog.md`](../plans/E3M3-prototype-backlog.md) E3M3-01 bullet from “bucket/tag fields” to `prototypeRole` (+ optional tick acceptance criteria) so backlog matches the implementation plan and shipped validator.~~ **Done.** E3M3-01 in-scope text, ticked acceptance criteria, and NEO-50 landed note.
 
 ## Nits
 

scripts/validate_content.py

@@ -284,17 +284,17 @@ def _prototype_slice1_item_gate(
         )
     if len(id_to_role) != len(roles):
         return "error: prototype Slice 1 duplicate prototypeRole across item rows"
-    armor_id = "prototype_armor_shell"
-    if id_to_role.get(armor_id) == "equip_stub":
-        if id_to_slot_kind.get(armor_id) != "equipment":
+    equip_stub_id = next((iid for iid, role in id_to_role.items() if role == "equip_stub"), None)
+    if equip_stub_id is not None:
+        if id_to_slot_kind.get(equip_stub_id) != "equipment":
             return (
-                f"error: {armor_id!r} (equip_stub) must use inventorySlotKind 'equipment', "
-                f"got {id_to_slot_kind.get(armor_id)!r}"
+                f"error: {equip_stub_id!r} (equip_stub) must use inventorySlotKind 'equipment', "
+                f"got {id_to_slot_kind.get(equip_stub_id)!r}"
             )
-        if id_to_stack_max.get(armor_id) != 1:
+        if id_to_stack_max.get(equip_stub_id) != 1:
             return (
-                f"error: {armor_id!r} (equip_stub) must use stackMax 1, "
-                f"got {id_to_stack_max.get(armor_id)!r}"
+                f"error: {equip_stub_id!r} (equip_stub) must use stackMax 1, "
+                f"got {id_to_stack_max.get(equip_stub_id)!r}"
             )
     return None