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skills/strict-tool-implementer/README.md

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+# Strict Tool Implementer
+
+Specialized skill for implementing strict tool use mode with guaranteed parameter validation.
+
+## Purpose
+
+This skill handles **end-to-end implementation** of strict tool use mode (`strict: true`), ensuring tool input parameters strictly follow your schema. Essential for building reliable agentic workflows with type-safe tool execution.
+
+## Use Cases
+
+- **Multi-Tool Agents**: Travel booking, research assistants, etc.
+- **Validated Function Calls**: Ensure parameters match expected types
+- **Complex Tool Schemas**: Tools with nested properties
+- **Critical Operations**: Financial transactions, booking systems
+- **Tool Composition**: Sequential and parallel tool execution
+
+## Prerequisites
+
+- Routed here by `structured-outputs-advisor`
+- Model: Claude Sonnet 4.5 or Opus 4.1
+- Beta header: `structured-outputs-2025-11-13`
+
+## Quick Start
+
+**Python:**
+```python
+response = client.beta.messages.create(
+    model="claude-sonnet-4-5",
+    betas=["structured-outputs-2025-11-13"],
+    messages=[{"role": "user", "content": "Search for flights..."}],
+    tools=[{
+        "name": "search_flights",
+        "description": "Search for available flights",
+        "strict": True,  # Enable strict validation
+        "input_schema": {
+            "type": "object",
+            "properties": {
+                "origin": {"type": "string"},
+                "destination": {"type": "string"},
+                "travelers": {"type": "integer", "enum": [1, 2, 3, 4, 5, 6]}
+            },
+            "required": ["origin", "destination", "travelers"],
+            "additionalProperties": False
+        }
+    }]
+)
+
+# Tool inputs GUARANTEED to match schema
+for block in response.content:
+    if block.type == "tool_use":
+        execute_tool(block.name, block.input)  # Type-safe!
+```
+
+## What You'll Learn
+
+1. **Tool Schema Design** - With `strict: true` and proper validation
+2. **Multi-Tool Workflows** - Sequential and parallel tool execution
+3. **Agent Patterns** - Stateful agents, retry logic, validation
+4. **Error Handling** - Tool failures, refusals, edge cases
+5. **Production Deployment** - Monitoring, testing, reliability
+
+## Examples
+
+- [travel-booking-agent.py](./examples/travel-booking-agent.py) - Multi-tool agent workflow
+
+## Related Skills
+
+- [`structured-outputs-advisor`](../structured-outputs-advisor/) - Choose the right mode
+- [`json-outputs-implementer`](../json-outputs-implementer/) - For data extraction
+
+## Reference Materials
+
+- [JSON Schema Limitations](../reference/json-schema-limitations.md)
+- [Best Practices](../reference/best-practices.md)
+- [API Compatibility](../reference/api-compatibility.md)
+
+## Version
+
+Current version: 0.1.0
+
+See [CHANGELOG.md](./CHANGELOG.md) for version history.