Extract seed resolution nodes

docs/prompt-architecture-improvement-plan.md

@@ -7,7 +7,8 @@ routing map in `docs/prompt-pool-routing-map.md`.
 
 The current branch adds two major surfaces:
 
-- `SxCP Krea2 Resolution Selector` in `__init__.py`, with README notes.
+- `SxCP Krea2 Resolution Selector` in `node_seed_resolution.py`, with README
+  notes.
 - Expanded hardcore interaction/manual/action pools in
   `categories/sexual_poses.json`,
   `categories/expression_composition_pools.json`, `prompt_builder.py`, and
@@ -271,7 +272,7 @@ Improve later:
 
 ### Node / UI Path
 
-Owner: `__init__.py`, `loop_nodes.py`, `web/*.js`.
+Owner: `__init__.py`, `node_seed_resolution.py`, `loop_nodes.py`, `web/*.js`.
 
 Keep here:
 
@@ -279,10 +280,16 @@ Keep here:
 - widget behavior;
 - button actions;
 - dynamic input slots.
+- seed and resolution utility node declarations in `node_seed_resolution.py`.
+
+Already isolated:
+
+- seed/global-seed/seed-locker and SDXL/Krea2 resolution utility nodes live in
+  `node_seed_resolution.py`, with registration maps imported by `__init__.py`.
 
 Improve later:
 
-- split large node classes into files by family;
+- split remaining large node classes into files by family;
 - keep node display names, return names, and docs in sync through the audit
   helper;
 - add small endpoint tests for profile/accumulator/index-switch routes.
@@ -400,8 +407,8 @@ Medium-term:
 
 ## Recommended Next Passes
 
-1. Split `__init__.py` node classes by family after behavior is covered by smoke
-   checks.
+1. Continue splitting remaining `__init__.py` node classes by family after
+   behavior is covered by smoke checks.
 2. Continue splitting the internals of `hardcore_role_graphs.py` by action
    family once generated edge cases are covered by smoke fixtures.
 3. Add more route-level smoke fixtures for generated edge cases that are not