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Claude Certified Developer — Foundations

Anthropic · Topic 3 of 5

Structured Output and Prompt Techniques

Getting reliable machine-readable output: JSON via tool_use schemas, required vs optional/nullable fields to prevent fabrication, enums with escape hatches, few-shot examples, prefills, and validation with retry-on-feedback.

5 lessons257 questions
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What this topic covers

  1. 01Reliable JSON with tool_use Schemas360m
  2. 02Required, Optional, and Nullable Fields300m
  3. 03Enums, Escape Hatches, and Normalization300m
  4. 04Few-shot Examples and Prefills for Format300m
  5. 05Validation and Retry-with-feedback300m

Other topics in Claude Certified Developer — Foundations

The Messages API5 lessonsTool Use and Function Calling5 lessonsPerformance, Cost, and Reliability5 lessonsIntegrating MCP and the SDKs5 lessons