Add model-reviewed CAD experience pipeline

text-to-cad/skills/cad-router/references/backend-contract.md

@@ -12,6 +12,12 @@ Capture these fields when known:
 - Part versus assembly, standard components, mating requirements, and motion relationships.
 - Required parameter controls, replay, semantic tags, or FreeCAD interchange.
 - Geometry and visual validation targets.
+- Optional schema `2.0` generalized experience library. Never pass a case
+  DesignIR, teacher STEP, source dimensions, coordinates, or surface references
+  to the selected backend.
+- For modification, accept only an explicitly supplied original model or
+  editable generator plus the promoted library. Never inspect the parser
+  input/output corpus or a private case JSON.
 
 ## Route decision
 
@@ -25,6 +31,9 @@ Record:
 - Workflow profiles such as `requirement_refinement` and `visual_repair`.
 - Focused downstream Skills.
 - Any explicit override and its reason.
+- `operation`: create or modify; for modification also record the explicit
+  source path and whether the route uses native parameter editing, local feature
+  rebuilding, or experience-guided semantic reconstruction.
 
 ## Task manifest
 
@@ -39,7 +48,7 @@ Write `cad-task.json` beside the task artifacts with this minimum shape:
     "runner_skill": "cad",
     "project": "text-to-cad",
     "fallback_order": ["simplecadapi", "cadam"],
-    "workflow_profiles": ["caddesigner_ecip"]
+    "workflow_profiles": ["requirement_refinement", "visual_repair"]
   },
   "source": {
     "path": "connecting_rod.py",
@@ -51,6 +60,11 @@ Write `cad-task.json` beside the task artifacts with this minimum shape:
     {"path": "connecting_rod.stl", "role": "secondary"}
   ],
   "parameters": {},
+  "experience": {
+    "library": "../../../cad-experience-library/library.json",
+    "context_kind": "generalized_cad_experience_query",
+    "methods_applied": []
+  },
   "assumptions": [],
   "validation": [],
   "viewer_links": []

text-to-cad/skills/cad-router/references/capabilities.md

@@ -38,9 +38,11 @@ Best fit:
 
 Do not use as the primary route for editable STEP, stable face/edge references, fit-critical source-level assemblies, or modification of imported STEP.
 
-## CADDesigner workflow profile
+## Router refinement and repair
 
-CADDesigner is not a fourth geometry engine. Apply its ECIP workflow to every route, then enable requirement expansion and visual repair when requirements are vague, reference images carry important intent, or visual complexity makes one-pass generation unreliable. Do not launch CADDesigner's separate LLM/Redis stack:
+Use text-to-cad's own requirement expansion and visual repair when requirements
+are vague, reference images carry important intent, or visual complexity makes
+one-pass generation unreliable:
 
 1. Refine the request into a measurable brief.
 2. Confirm important fit- or safety-critical unknowns.