Document route policy validation coverage

docs/prompt-architecture-improvement-plan.md

@@ -21,6 +21,11 @@ The map audit currently sees:
 - 23 expression pools.
 - 24 composition pools.
 - A new Krea2 resolution node with width/height/API aspect outputs.
+- Registered route policy validation, so action/position families stay covered
+  by SDXL family tags, caption labels, and SDXL incompatibility-filter keys.
+- Route simulation family coverage, so representative generated rows exercise
+  every registered action and position family except documented special cases
+  covered by dedicated smoke fixtures.
 
 ## Architectural Finding
 
@@ -536,8 +541,9 @@ Improve later:
 
 - keep `tools/prompt_map_audit.py` passing; it now checks referenced
   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.
+  metadata values for both string and object templates, registered formatter
+  policy coverage for route families, and critical route documentation plus
+  expected smoke coverage.
 
 ### Node / UI Path
 
@@ -667,6 +673,9 @@ Near-term:
   outputs so source contact/guidance/presentation wording stays metadata-driven.
 - Cover generated fallback role routes through Krea, SDXL, and natural caption
   outputs so solo and same-sex paths do not remain untested edge behavior.
+- Keep route simulation coverage updated when adding action or position
+  families, so generated Krea2, SDXL, and natural-caption paths prove the new
+  family reaches formatter metadata routes.
 
 Medium-term: