feat: repo-agnostic refactor (BMad spec-test-build loop)

- NEW: repo-profiler.js — deterministic archetype detection (Infra, Frontend, Backend, etc.)
- NEW: extract-dynamic.js — generic extractor replacing hardcoded Foxtrot patterns
- NEW: eval-generator.js — dynamic ground-truth question generation from any repo graph
- NEW: specs/bmad-agnostic-refactor-spec.md — full BMad spec with acceptance criteria
- REFACTORED: prose.js — two-pass LLM synthesis with rich context (shared secrets, ports, service refs)
- REFACTORED: sysdoc.js — wired repo-profiler + extract-dynamic, --legacy escape hatch
- REFACTORED: wiggum-v2.sh — uses eval-generator before benchmarks
- FIXED: graph.js — _edgeSet rebuilt on loadSnapshot() (edge dedup was broken)
- FIXED: graph.js — recursive sortKeys() for deep equality in diffing
- FIXED: prose.js — robust JSON array extraction from LLM output
- FIXED: ratchet.js — syntax validation (node --check) before saving LLM mutations
- FIXED: extract-dynamic.js — centralized state services regex, added console.warn for silent failures
- TESTS: test-eval-generator, test-repo-profiler, test-synthesis-quality + mock fixtures

Eval: 81.5% on Foxtrot (fully repo-agnostic, no hardcoded reference pages)
BMad reviews: Architect B+, Dev Lead B-, TEA B-

test/fixtures/mock-express-graph.json

@@ -0,0 +1,85 @@
+{
+  "nodes": {
+    "src/index.js": {
+      "id": "src/index.js",
+      "type": "file",
+      "name": "src/index.js",
+      "path": "src/index.js",
+      "metadata": {
+        "exports": []
+      }
+    },
+    "src/routes/users.js": {
+      "id": "src/routes/users.js",
+      "type": "file",
+      "name": "src/routes/users.js",
+      "path": "src/routes/users.js",
+      "metadata": {
+        "exports": ["userRouter"]
+      }
+    },
+    "src/controllers/userController.js": {
+      "id": "src/controllers/userController.js",
+      "type": "file",
+      "name": "src/controllers/userController.js",
+      "path": "src/controllers/userController.js",
+      "metadata": {
+        "exports": ["getUser", "createUser"]
+      }
+    },
+    "src/models/userModel.js": {
+      "id": "src/models/userModel.js",
+      "type": "file",
+      "name": "src/models/userModel.js",
+      "path": "src/models/userModel.js",
+      "metadata": {
+        "exports": ["User"]
+      }
+    },
+    "GET /users/:id": {
+      "id": "GET /users/:id",
+      "type": "route",
+      "name": "GET /users/:id",
+      "metadata": {
+        "method": "GET",
+        "path": "/users/:id"
+      }
+    },
+    "POST /users": {
+      "id": "POST /users",
+      "type": "route",
+      "name": "POST /users",
+      "metadata": {
+        "method": "POST",
+        "path": "/users"
+      }
+    }
+  },
+  "edges": [
+    {
+      "source": "src/index.js",
+      "target": "src/routes/users.js",
+      "type": "imports"
+    },
+    {
+      "source": "src/routes/users.js",
+      "target": "src/controllers/userController.js",
+      "type": "imports"
+    },
+    {
+      "source": "src/controllers/userController.js",
+      "target": "src/models/userModel.js",
+      "type": "imports"
+    },
+    {
+      "source": "src/routes/users.js",
+      "target": "GET /users/:id",
+      "type": "defines"
+    },
+    {
+      "source": "src/routes/users.js",
+      "target": "POST /users",
+      "type": "defines"
+    }
+  ]
+}