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skills/api/json-structured-outputs/json-outputs-implementer/workflow/phase-3-error-handling.md

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+# Phase 3: Error Handling
+
+**Objective**: Handle refusals, token limits, and validation errors
+
+## Key Error Scenarios
+
+### 1. Safety Refusals (`stop_reason: "refusal"`)
+
+```python
+if response.stop_reason == "refusal":
+    logger.warning(f"Request refused: {input_text}")
+    # Don't retry - respect safety boundaries
+    return None  # or raise exception
+```
+
+### 2. Token Limit Reached (`stop_reason: "max_tokens"`)
+
+```python
+if response.stop_reason == "max_tokens":
+    # Retry with higher limit
+    return extract_with_higher_limit(text, max_tokens * 1.5)
+```
+
+### 3. Schema Validation Errors (SDK raises exception)
+
+```python
+from pydantic import ValidationError
+
+try:
+    result = response.parsed_output
+except ValidationError as e:
+    logger.error(f"Schema validation failed: {e}")
+    # Should be rare - indicates schema mismatch
+    raise
+```
+
+### 4. API Errors (400 - schema too complex)
+
+```python
+from anthropic import BadRequestError
+
+try:
+    response = client.beta.messages.parse(...)
+except BadRequestError as e:
+    if "too complex" in str(e).lower():
+        # Simplify schema
+        logger.error("Schema too complex, simplifying...")
+    raise
+```
+
+## Output
+
+Robust error handling for production deployments.