Audit route documentation coverage

docs/prompt-architecture-improvement-plan.md

@@ -501,8 +501,9 @@ Keep here:
 Improve later:
 
 - keep `tools/prompt_map_audit.py` passing; it now checks referenced
-  expression/composition/scene pools, item-template axes, and object-template
-  metadata values for both string and object templates.
+  expression/composition/scene pools, item-template axes, object-template
+  metadata values for both string and object templates, and critical route
+  documentation plus expected smoke coverage.
 
 ### Node / UI Path
 

docs/prompt-pool-routing-map.md

@@ -813,11 +813,13 @@ 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`.
+- route documentation validation so critical route modules are listed in this
+  map and the architecture plan, and covered by their expected smoke cases.
 
 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 or item template axes do not
-resolve.
+script exits nonzero when JSON pool references, item template axes, critical
+route docs, or critical route smoke coverage do not resolve.
 
 ## Behavioral Smoke Helper