Extract row category route policy

docs/prompt-architecture-improvement-plan.md

@@ -131,6 +131,10 @@ Already isolated:
 - row item selection, weighted item/pair choice, item-template axis filling,
   and oral/outercourse axis compatibility filters live in `row_item.py`;
   `prompt_builder.py` keeps public delegate wrappers.
+- row category/subcategory/item route resolution, hardcore position-category
+  filtering, cast-count adjustment, pose-vs-content seed-axis choice, item
+  metadata collection, and pose-category item sanitizing live in
+  `row_category_route.py`; `prompt_builder.py` keeps public delegate wrappers.
 - row prompt/caption template selection, safe formatting, default prompt
   templates, configured-cast descriptor insertion, and POV directive insertion
   live in `row_rendering.py`; `prompt_builder.py` keeps compatibility aliases.

docs/prompt-pool-routing-map.md

@@ -71,6 +71,7 @@ Core helper ownership:
 | `category_extensions.py` | JSON `pool_extensions`, legacy pool patching, built-in category choice lists, and category/subcategory UI choices. |
 | `category_template_metadata.py` | Object-style item-template metadata extraction, action/position family normalization, position-key normalization, key merging, and audit validation errors. |
 | `row_item.py` | Row item selection, weighted item/pair choice, item-template axis filling, and oral/outercourse axis compatibility filters. |
+| `row_category_route.py` | Row category/subcategory/item route resolution, hardcore position-category filtering, cast-count adjustment, pose-vs-content seed-axis choice, item metadata collection, and pose-category item sanitizing. |
 | `row_rendering.py` | Row prompt/caption template selection, safe formatting, default prompt templates, configured-cast descriptor insertion, and POV directive insertion. |
 | `row_route_metadata.py` | Row action/position route metadata resolution, template metadata precedence, inferred position-key merging, and source action-family fallback. |
 | `row_generation.py` | Built-in legacy row generation, auto-weighted/auto-full selection, row mode randomization, ratio clamps, and expression-intensity randomization. |
@@ -469,13 +470,13 @@ plain prompt text. When debugging, inspect these fields before editing pools.
 | Field | Owner | Consumed by | Meaning |
 | --- | --- | --- | --- |
 | `source` | `build_prompt` / row builder | All formatters | Usually `json_category` or `built_in_generator`; tells which route created the row. |
-| `main_category`, `subcategory` | Category selection | All formatters and debug | Human-readable selected category route. |
-| `category_slug`, `subcategory_slug` | JSON category normalization | Debug/filtering | Stable-ish machine labels for selected category route. |
-| `content_seed_axis` | `_build_custom_row` | Debug | Shows whether the item/action was driven by `content` or `pose`. Critical for hardcore pose categories. |
-| `item` | `row_item.compose_item` or Insta override | Krea/SDXL/Naturalizer | Clothing item, category item, or sexual scene/action text. |
-| `item_axis_values` | `row_item.compose_item` | Krea hardcore rewrite, SDXL tags | Filled template axes such as position/action/detail values. |
-| `item_template_metadata` | `row_item.compose_item` | Debug, Krea/SDXL/Naturalizer route metadata | Optional metadata from object-style item templates; currently used to prefer explicit action/position families and keys before inference. |
-| `formatter_hints` | `category_template_metadata.formatter_hints` | Krea/SDXL/Naturalizer route specialization, debug | Normalized route-specific hints from object-style item templates, keyed by `all`, `krea`, `sdxl`, or `caption`; each formatter consumes `all` plus its own route only. |
+| `main_category`, `subcategory` | `row_category_route.select_category_item_route` | All formatters and debug | Human-readable selected category route. |
+| `category_slug`, `subcategory_slug` | `row_category_route.select_category_item_route` | Debug/filtering | Stable-ish machine labels for selected category route. |
+| `content_seed_axis` | `row_category_route.select_category_item_route` | Debug | Shows whether the item/action was driven by `content` or `pose`. Critical for hardcore pose categories. |
+| `item` | `row_category_route.select_category_item_route` or Insta override | Krea/SDXL/Naturalizer | Clothing item, category item, or sexual scene/action text. |
+| `item_axis_values` | `row_category_route.select_category_item_route` | Krea hardcore rewrite, SDXL tags | Filled template axes such as position/action/detail values. |
+| `item_template_metadata` | `row_category_route.select_category_item_route` | Debug, Krea/SDXL/Naturalizer route metadata | Optional metadata from object-style item templates; currently used to prefer explicit action/position families and keys before inference. |
+| `formatter_hints` | `row_category_route.select_category_item_route` | Krea/SDXL/Naturalizer route specialization, debug | Normalized route-specific hints from object-style item templates, keyed by `all`, `krea`, `sdxl`, or `caption`; each formatter consumes `all` plus its own route only. |
 | `action_family` | `row_route_metadata.resolve_action_position_route` | Krea hardcore rewrite, SDXL tags, natural captions, debug | Source-aware formatter semantic family such as `foreplay`, `outercourse`, `oral`, `penetration`, `toy_double`, or `climax`. |
 | `position_family` | `row_route_metadata.resolve_action_position_route` | Debug/filtering | Source/UI hardcore family selected by template metadata or subcategory, such as `manual`, `interaction`, `oral`, `anal`, or `climax`. |
 | `position_key`, `position_keys` | `row_route_metadata.resolve_action_position_route` | Debug/future filters | Concrete position tokens from object-template metadata and inferred axes/role text, such as `kneeling`, `doggy`, `boobjob`, or `open_thighs`. |