Lesson 1546 of 2116
Validating AI agent output against a Zod or Pydantic schema
Treat the LLM's response as untrusted input and parse it through a schema before it touches your system.
Lesson map
What this lesson covers
Learning path
The main moves in order
- 1The premise
- 2schema validation
- 3structured output
- 4defensive parsing
Concept cluster
Terms to connect while reading
Section 1
The premise
JSON-mode is not a guarantee — schema validation is the actual safety net.
What AI does well here
- Parse every structured response through Zod/Pydantic
- Auto-retry on parse failure with the error attached
What AI cannot do
- Validate semantic correctness, only shape
- Catch a hallucinated value that fits the schema
Key terms in this lesson
End-of-lesson quiz
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