Which Claude models support structured outputs?

Structured outputs are supported by the latest models, including Claude 3.5 Sonnet and Claude 3.5 Opus, when using the appropriate beta headers in the API request.

Does this skill provide the actual implementation code?

The Advisor focuses on the strategy and selection phase. Once the correct mode is chosen, it delegates to specialized implementer skills that generate the Pydantic, Zod, or JSON Schema code.

Can I use JSON Outputs and Strict Tool Use in the same request?

Yes, it is possible to use both modes together. This skill helps you determine if a hybrid approach is necessary for your specific use case.

What is the difference between JSON Outputs and Strict Tool Use?

JSON Outputs (output_format) are used when you need Claude's final response to match a specific schema, whereas Strict Tool Use (strict: true) ensures that the parameters sent to a function call are validated against your schema.

Structured Outputs Advisor

Name: Structured Outputs Advisor
Author: cskiro

bycskiro

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API Development

Guides developers in choosing and implementing Anthropic's structured output modes for guaranteed schema compliance and validated tool inputs.

The Structured Outputs Advisor acts as a specialized consultant within Claude Code to help developers navigate Anthropic’s structured data features. By analyzing specific project requirements, it determines whether JSON Outputs (ideal for data extraction and classification) or Strict Tool Use (optimized for reliable agentic workflows) is the better fit. It provides expert trade-off analysis, ensures schema compatibility, and facilitates a seamless handoff to specialized implementation skills, reducing development time and ensuring type-safe, production-ready AI integrations.

Key Features

01Requirements gathering for data extraction and agentic tool calling

02Contextual mode selection between JSON Outputs and Strict Tool Use

03Comprehensive trade-off analysis and decision matrix for AI architectures

042 GitHub stars

05Validation guidance for Pydantic and Zod schema integration

06Automated delegation to specialized implementation sub-skills

Use Cases

01Validating complex tool parameters for multi-step agentic workflows

02Designing type-safe API response formats with guaranteed schema compliance

03Architecting a reliable data extraction pipeline from unstructured text

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add cskiro/claudex structured-outputs-advisor

For use in Claude.ai and ChatGPT

Download Skill