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skills/strict-tool-implementer/workflow/phase-5-production.md

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+# Phase 5: Production Agent Patterns
+
+**Objective**: Production-ready agent architectures
+
+## Pattern 1: Stateful Agent with Memory
+
+```python
+class StatefulTravelAgent:
+    """Agent that maintains state across interactions."""
+
+    def __init__(self):
+        self.conversation_history: List[Dict] = []
+        self.booking_state: Dict[str, Any] = {}
+
+    def chat(self, user_message: str) -> str:
+        """Process user message and return response."""
+        self.conversation_history.append({
+            "role": "user",
+            "content": user_message
+        })
+
+        response = client.beta.messages.create(
+            model="claude-sonnet-4-5",
+            betas=["structured-outputs-2025-11-13"],
+            max_tokens=2048,
+            messages=self.conversation_history,
+            tools=TOOLS,
+        )
+
+        # Process tools and update state
+        final_response = self._process_response(response)
+
+        self.conversation_history.append({
+            "role": "assistant",
+            "content": final_response
+        })
+
+        return final_response
+
+    def _process_response(self, response) -> str:
+        """Process tool calls and maintain state."""
+        # Implementation...
+        pass
+
+# Usage
+agent = StatefulTravelAgent()
+print(agent.chat("I want to go to Paris"))
+print(agent.chat("For 2 people"))  # Remembers context
+print(agent.chat("May 15 to May 22"))  # Continues booking
+```
+
+## Pattern 2: Tool Retry Logic
+
+```python
+def execute_tool_with_retry(
+    tool_name: str,
+    tool_input: Dict,
+    max_retries: int = 3
+) -> Dict:
+    """Execute tool with exponential backoff retry."""
+    import time
+
+    for attempt in range(max_retries):
+        try:
+            tool_func = TOOL_FUNCTIONS[tool_name]
+            result = tool_func(**tool_input)
+            return {"success": True, "data": result}
+
+        except Exception as e:
+            if attempt == max_retries - 1:
+                return {"success": False, "error": str(e)}
+
+            wait_time = 2 ** attempt  # Exponential backoff
+            logger.warning(f"Tool {tool_name} failed, retrying in {wait_time}s")
+            time.sleep(wait_time)
+```
+
+## Pattern 3: Tool Result Validation
+
+```python
+def validate_tool_result(tool_name: str, result: Any) -> bool:
+    """Validate tool execution result."""
+    validators = {
+        "search_flights": lambda r: "flights" in r and len(r["flights"]) > 0,
+        "book_flight": lambda r: "confirmation" in r,
+        "search_hotels": lambda r: "hotels" in r,
+    }
+
+    validator = validators.get(tool_name)
+    if validator:
+        return validator(result)
+
+    return True  # No validator = assume valid
+```
+
+## Output
+
+Production-ready agent patterns with state management, retry logic, and validation.