Nomad changes

fixtures/smoke/json_basic.json

@@ -0,0 +1,27 @@
+{
+  "id": "smoke_json_basic",
+  "category": "smoke",
+  "description": "Smoke test: JSON file extraction",
+  "tags": ["smoke", "structured", "json"],
+  "input": {
+    "path": "json/simple.json",
+    "mime_type": "application/json",
+    "config": {}
+  },
+  "assertions": [
+    {
+      "type": "equals",
+      "field": "mime_type",
+      "value": "application/json"
+    },
+    {
+      "type": "min_length",
+      "field": "content",
+      "value": 5
+    }
+  ],
+  "skip": {
+    "languages": ["wasm"],
+    "reason": "WASM cannot access filesystem; use extractBytes with file content instead"
+  }
+}