Audit category selector identities

docs/prompt-pool-routing-map.md

@@ -902,6 +902,9 @@ The script does not import ComfyUI. It parses the repo and prints:
 - JSON reference validation for every `scene_pools`, `expression_pools`, and
   `composition_pools` reference;
 - item template validation so `{placeholder}` names resolve to `item_axes`.
+- category identity validation so custom category names/slugs do not collide
+  with built-in selectors, category identities stay unique, and exact
+  subcategory selectors cannot become ambiguous.
 - effective category route coverage so each normalized category path has
   usable item, scene, expression, composition, and hardcore route metadata
   before runtime fallbacks can hide a gap.
@@ -920,9 +923,9 @@ The script does not import ComfyUI. It parses the repo and prints:
 
 Use its output to spot doc drift after adding a new node or pool. If a new node
 or pool appears there but not in this map, update the relevant route table. The
-script exits nonzero when JSON pool references, item template axes, critical
-route docs, critical route smoke registrations, or registered node display
-names do not resolve.
+script exits nonzero when JSON pool references, item template axes, category
+identities, critical route docs, critical route smoke registrations, or
+registered node display names do not resolve.
 
 ## Behavioral Smoke Helper