Nomad changes

docs/snippets/python/plugins/plugin_validator.md

@@ -0,0 +1,34 @@
+```python title="Python"
+from kreuzberg import (
+    ExtractionResult,
+    ValidationError,
+    extract_file_sync,
+    register_validator,
+)
+
+class MinLengthValidator:
+    def name(self) -> str:
+        return "min_length"
+
+    def version(self) -> str:
+        return "1.0.0"
+
+    def validate(self, result: ExtractionResult) -> None:
+        if len(result.content) < 50:
+            raise ValidationError(f"Content too short: {len(result.content)}")
+
+    def should_validate(self, result: ExtractionResult) -> bool:
+        return True
+
+    def initialize(self) -> None:
+        pass
+
+    def shutdown(self) -> None:
+        pass
+
+validator: MinLengthValidator = MinLengthValidator()
+register_validator(validator)
+
+result = extract_file_sync("document.pdf")
+print(f"Content length: {len(result.content)}")
+```