diff --git a/builder_config_route.py b/builder_config_route.py
new file mode 100644
index 0000000..c1e9de4
--- /dev/null
+++ b/builder_config_route.py
@@ -0,0 +1,101 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Any, Callable
+
+
+@dataclass(frozen=True)
+class PromptFromConfigsRequest:
+    row_number: int
+    start_index: int
+    seed: int
+    category_config: str | dict[str, Any] | None = ""
+    cast_config: str | dict[str, Any] | None = ""
+    generation_profile: str | dict[str, Any] | None = ""
+    filter_config: str | dict[str, Any] | None = ""
+    seed_config: str | dict[str, Any] | None = ""
+    camera_config: str | dict[str, Any] | None = ""
+    character_profile: str | dict[str, Any] | None = ""
+    character_cast: str | dict[str, Any] | list[Any] | None = ""
+    hardcore_position_config: str | dict[str, Any] | None = ""
+    location_config: str | dict[str, Any] | None = ""
+    composition_config: str | dict[str, Any] | None = ""
+    extra_positive: str = ""
+    extra_negative: str = ""
+
+
+@dataclass(frozen=True)
+class PromptFromConfigsRoute:
+    row: dict[str, Any]
+    category: str
+    subcategory: str
+    cast: dict[str, Any]
+    profile: dict[str, Any]
+    filters: dict[str, Any]
+    build_kwargs: dict[str, Any]
+
+
+@dataclass(frozen=True)
+class PromptFromConfigsDependencies:
+    parse_category_config: Callable[[str | dict[str, Any] | None], tuple[str, str]]
+    parse_cast_config: Callable[[str | dict[str, Any] | None], dict[str, Any]]
+    parse_generation_profile: Callable[[str | dict[str, Any] | None], dict[str, Any]]
+    parse_filter_config: Callable[[str | dict[str, Any] | None], dict[str, Any]]
+    build_prompt: Callable[..., dict[str, Any]]
+
+
+def build_prompt_from_configs_result(
+    request: PromptFromConfigsRequest,
+    deps: PromptFromConfigsDependencies,
+) -> PromptFromConfigsRoute:
+    category, subcategory = deps.parse_category_config(request.category_config)
+    cast = deps.parse_cast_config(request.cast_config)
+    profile = deps.parse_generation_profile(request.generation_profile)
+    filters = deps.parse_filter_config(request.filter_config)
+    build_kwargs: dict[str, Any] = {
+        "category": category,
+        "subcategory": subcategory,
+        "row_number": request.row_number,
+        "start_index": request.start_index,
+        "seed": request.seed,
+        "clothing": profile["clothing"],
+        "ethnicity": filters["ethnicity"],
+        "poses": profile["poses"],
+        "expression_enabled": profile["expression_enabled"],
+        "expression_intensity": profile["expression_intensity"],
+        "backside_bias": profile["backside_bias"],
+        "figure": filters["figure"],
+        "no_plus_women": filters["no_plus_women"],
+        "no_black": filters["no_black"],
+        "women_count": int(cast["women_count"]),
+        "men_count": int(cast["men_count"]),
+        "minimal_clothing_ratio": profile["minimal_clothing_ratio"],
+        "standard_pose_ratio": profile["standard_pose_ratio"],
+        "trigger": profile["trigger"],
+        "prepend_trigger_to_prompt": profile["prepend_trigger_to_prompt"],
+        "extra_positive": request.extra_positive or "",
+        "extra_negative": request.extra_negative or "",
+        "seed_config": request.seed_config or "",
+        "camera_config": request.camera_config or "",
+        "character_profile": request.character_profile or "",
+        "character_cast": request.character_cast or "",
+        "hardcore_position_config": request.hardcore_position_config or "",
+        "location_config": request.location_config or "",
+        "composition_config": request.composition_config or "",
+    }
+    return PromptFromConfigsRoute(
+        row=deps.build_prompt(**build_kwargs),
+        category=category,
+        subcategory=subcategory,
+        cast=dict(cast),
+        profile=dict(profile),
+        filters=dict(filters),
+        build_kwargs=build_kwargs,
+    )
+
+
+def build_prompt_from_configs(
+    request: PromptFromConfigsRequest,
+    deps: PromptFromConfigsDependencies,
+) -> dict[str, Any]:
+    return build_prompt_from_configs_result(request, deps).row
diff --git a/docs/prompt-architecture-improvement-plan.md b/docs/prompt-architecture-improvement-plan.md
index 50cf267..3e7c0ff 100644
--- a/docs/prompt-architecture-improvement-plan.md
+++ b/docs/prompt-architecture-improvement-plan.md
@@ -120,6 +120,9 @@ Move or isolate later:
 
 Already isolated:
 
+- config-driven prompt-builder request parsing, helper-node config mapping, and
+  direct `build_prompt` kwarg assembly live in `builder_config_route.py`;
+  `prompt_builder.py` keeps the public wrapper.
 - JSON category loading, subcategory normalization, named scene/expression/
   composition pool loading, cast compatibility filtering, exact subcategory
   lookup, and inheritance-based pool merging live in `category_library.py`.
diff --git a/docs/prompt-pool-routing-map.md b/docs/prompt-pool-routing-map.md
index a5de355..c7a33fc 100644
--- a/docs/prompt-pool-routing-map.md
+++ b/docs/prompt-pool-routing-map.md
@@ -61,7 +61,7 @@ call the same core generation functions.
 | ComfyUI node | Python entry | What it owns |
 | --- | --- | --- |
 | `SxCP Prompt Builder` | `build_prompt` | Direct single prompt generation. Can use built-in categories or JSON categories. |
-| `SxCP Prompt Builder From Configs` | `build_prompt_from_configs` -> `build_prompt` | Same generator, but inputs come from category/cast/profile/filter helper nodes. |
+| `SxCP Prompt Builder From Configs` | `build_prompt_from_configs` -> `builder_config_route.py` -> `build_prompt` | Same generator, but inputs come from category/cast/profile/filter helper nodes. |
 | `SxCP Insta/OF Prompt Pair` | `build_insta_of_pair` | Builds a softcore row and hardcore row with shared cast/continuity options. |
 | `SxCP Krea2 Formatter` | `format_krea2_prompt` | Converts metadata rows or pair metadata into Krea2-friendly prose. |
 | `SxCP SDXL Formatter` | `format_sdxl_prompt` | Converts metadata rows or pair metadata into SDXL/tag style prompts. |
@@ -72,6 +72,7 @@ Core helper ownership:
 | Python module | What it owns |
 | --- | --- |
 | `category_library.py` | JSON category loading, subcategory normalization, named scene/expression/composition pool loading, cast compatibility filtering, exact subcategory lookup, and inheritance-based pool merging. |
+| `builder_config_route.py` | Config-driven prompt-builder request parsing, category/cast/profile/filter helper-node mapping, and direct `build_prompt` kwarg assembly. |
 | `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. |
diff --git a/prompt_builder.py b/prompt_builder.py
index 9344c06..a4fbcdd 100644
--- a/prompt_builder.py
+++ b/prompt_builder.py
@@ -5,6 +5,7 @@ from pathlib import Path
 from typing import Any
 
 try:
+    from . import builder_config_route as builder_config_route_policy
     from .category_library import (
         compatible_entries as _compatible_entries,
         compatible_entry as _compatible_entry,
@@ -51,6 +52,7 @@ try:
         sanitize_hardcore_environment_anchors as _sanitize_hardcore_environment_anchors,
     )
 except ImportError:  # Allows local smoke tests with `python -c`.
+    import builder_config_route as builder_config_route_policy
     from category_library import (
         compatible_entries as _compatible_entries,
         compatible_entry as _compatible_entry,
@@ -2609,6 +2611,16 @@ def build_prompt(
     return row
 
 
+def _prompt_from_configs_dependencies() -> builder_config_route_policy.PromptFromConfigsDependencies:
+    return builder_config_route_policy.PromptFromConfigsDependencies(
+        parse_category_config=_parse_category_config,
+        parse_cast_config=_parse_cast_config,
+        parse_generation_profile=_parse_generation_profile,
+        parse_filter_config=_parse_filter_config,
+        build_prompt=build_prompt,
+    )
+
+
 def build_prompt_from_configs(
     row_number: int,
     start_index: int,
@@ -2627,40 +2639,26 @@ def build_prompt_from_configs(
     extra_positive: str = "",
     extra_negative: str = "",
 ) -> dict[str, Any]:
-    category, subcategory = _parse_category_config(category_config)
-    cast = _parse_cast_config(cast_config)
-    profile = _parse_generation_profile(generation_profile)
-    filters = _parse_filter_config(filter_config)
-    return build_prompt(
-        category=category,
-        subcategory=subcategory,
-        row_number=row_number,
-        start_index=start_index,
-        seed=seed,
-        clothing=profile["clothing"],
-        ethnicity=filters["ethnicity"],
-        poses=profile["poses"],
-        expression_enabled=profile["expression_enabled"],
-        expression_intensity=profile["expression_intensity"],
-        backside_bias=profile["backside_bias"],
-        figure=filters["figure"],
-        no_plus_women=filters["no_plus_women"],
-        no_black=filters["no_black"],
-        women_count=int(cast["women_count"]),
-        men_count=int(cast["men_count"]),
-        minimal_clothing_ratio=profile["minimal_clothing_ratio"],
-        standard_pose_ratio=profile["standard_pose_ratio"],
-        trigger=profile["trigger"],
-        prepend_trigger_to_prompt=profile["prepend_trigger_to_prompt"],
-        extra_positive=extra_positive or "",
-        extra_negative=extra_negative or "",
-        seed_config=seed_config or "",
-        camera_config=camera_config or "",
-        character_profile=character_profile or "",
-        character_cast=character_cast or "",
-        hardcore_position_config=hardcore_position_config or "",
-        location_config=location_config or "",
-        composition_config=composition_config or "",
+    return builder_config_route_policy.build_prompt_from_configs(
+        builder_config_route_policy.PromptFromConfigsRequest(
+            row_number=row_number,
+            start_index=start_index,
+            seed=seed,
+            category_config=category_config,
+            cast_config=cast_config,
+            generation_profile=generation_profile,
+            filter_config=filter_config,
+            seed_config=seed_config,
+            camera_config=camera_config,
+            character_profile=character_profile,
+            character_cast=character_cast,
+            hardcore_position_config=hardcore_position_config,
+            location_config=location_config,
+            composition_config=composition_config,
+            extra_positive=extra_positive,
+            extra_negative=extra_negative,
+        ),
+        _prompt_from_configs_dependencies(),
     )
 
 
diff --git a/tools/prompt_smoke.py b/tools/prompt_smoke.py
index a41365d..a32c8aa 100644
--- a/tools/prompt_smoke.py
+++ b/tools/prompt_smoke.py
@@ -28,6 +28,7 @@ import caption_naturalizer  # noqa: E402
 import caption_metadata_routes  # noqa: E402
 import caption_policy  # noqa: E402
 import caption_text_policy  # noqa: E402
+import builder_config_route  # noqa: E402
 import cast_context  # noqa: E402
 import category_extensions  # noqa: E402
 import category_template_metadata  # noqa: E402
@@ -604,6 +605,62 @@ def smoke_config_route_location_theme() -> None:
     _expect_formatter_outputs(row, "config_route_location_theme", target="single")
 
 
+def smoke_builder_config_route_policy() -> None:
+    category_config = pb.build_category_config_json("women_casual", "Casual clothes / Smart casual")
+    cast_config = pb.build_cast_config_json("solo_woman")
+    generation_profile = pb.build_generation_profile_json(
+        profile="casual_clean",
+        trigger_policy="prepend_trigger",
+    )
+    filter_config = pb.build_filter_config_json(
+        ethnicity="french_european",
+        figure="balanced",
+    )
+    seed_config_json = pb.build_seed_lock_config_json(base_seed=3401, reroll_axis="scene", reroll_seed=3402)
+    request = builder_config_route.PromptFromConfigsRequest(
+        row_number=2,
+        start_index=5,
+        seed=3401,
+        category_config=category_config,
+        cast_config=cast_config,
+        generation_profile=generation_profile,
+        filter_config=filter_config,
+        seed_config=seed_config_json,
+        extra_positive="clean route marker",
+        extra_negative="bad route marker",
+    )
+    typed_route = builder_config_route.build_prompt_from_configs_result(
+        request,
+        pb._prompt_from_configs_dependencies(),
+    )
+    legacy_row = pb.build_prompt_from_configs(
+        row_number=request.row_number,
+        start_index=request.start_index,
+        seed=request.seed,
+        category_config=category_config,
+        cast_config=cast_config,
+        generation_profile=generation_profile,
+        filter_config=filter_config,
+        seed_config=seed_config_json,
+        extra_positive=request.extra_positive,
+        extra_negative=request.extra_negative,
+    )
+    _expect(typed_route.row == legacy_row, "Prompt Builder From Configs route should match public wrapper output")
+    _expect(typed_route.category == "Casual clothes", "Config route lost category preset")
+    _expect(typed_route.subcategory == "Casual clothes / Smart casual", "Config route lost requested subcategory")
+    _expect(typed_route.cast["women_count"] == 1 and typed_route.cast["men_count"] == 0, "Config route lost cast preset")
+    _expect(typed_route.profile["trigger"] == "sxcpinup_coloredpencil", "Config route lost generation profile trigger")
+    _expect(typed_route.filters["ethnicity"] == "french_european", "Config route lost filter ethnicity")
+    kwargs = typed_route.build_kwargs
+    _expect(kwargs["category"] == typed_route.category, "Config route build kwargs category drifted")
+    _expect(kwargs["subcategory"] == typed_route.subcategory, "Config route build kwargs subcategory drifted")
+    _expect(kwargs["women_count"] == 1 and kwargs["men_count"] == 0, "Config route build kwargs cast counts drifted")
+    _expect(kwargs["seed_config"] == seed_config_json, "Config route build kwargs seed config drifted")
+    _expect(kwargs["extra_positive"] == "clean route marker", "Config route build kwargs extra positive drifted")
+    _expect("clean route marker" in typed_route.row.get("prompt", ""), "Config route row lost extra positive")
+    _expect("bad route marker" in typed_route.row.get("negative_prompt", ""), "Config route row lost extra negative")
+
+
 def smoke_krea_normal_row_routes() -> None:
     single = {
         "subject_type": "woman",
@@ -5365,6 +5422,7 @@ SMOKE_CASES: list[tuple[str, Callable[[], None]]] = [
     ("camera_scene_single", smoke_camera_scene_single),
     ("row_camera_policy", smoke_row_camera_policy),
     ("config_route_location_theme", smoke_config_route_location_theme),
+    ("builder_config_route_policy", smoke_builder_config_route_policy),
     ("krea_normal_row_routes", smoke_krea_normal_row_routes),
     ("krea_row_fields_policy", smoke_krea_row_fields_policy),
     ("location_config_policy", smoke_location_config_policy),