fix: add required max_tokens argument to Anthropic client

tests/test_anthropic.py

@@ -87,6 +87,7 @@ def test_anthropic_generate_content(
     # Verify the internal SDK method was called with the correct model and prompt
     mock_instance.messages.create.assert_called_once_with(
         model="claude-3-7-sonnet-20250219",
+        max_tokens=AnthropicClient.DEFAULT_MAX_TOKENS,
         messages=[{"role": "user", "content": "Test prompt"}],
         system="Test instruction",
         temperature=0.7,

wptgen/llm.py

@@ -328,6 +328,8 @@ def prompt_exceeds_input_token_limit(
 class AnthropicClient(LLMClient):
     """Client for interacting with Anthropic's API."""
 
+    DEFAULT_MAX_TOKENS = 8192
+
     def __init__(
         self,
         api_key: str,
@@ -378,6 +380,7 @@ def generate_content(
         target_model = model or self.model
         kwargs: dict[str, Any] = {
             "model": target_model,
+            "max_tokens": self.DEFAULT_MAX_TOKENS,
             "messages": [{"role": "user", "content": prompt}],
         }