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What Changed in Zod 4, and How I Migrated Production Schemas

What Changed in Zod 4, and How I Migrated Production Schemas

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4 min read
Your First LLM Call in TypeScript Is Untyped — Here's the Fix

Your First LLM Call in TypeScript Is Untyped — Here's the Fix

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6 min read
Tool Calling in TypeScript: Zod Schema to Working Function in 40 Lines

Tool Calling in TypeScript: Zod Schema to Working Function in 40 Lines

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5 min read
The Tool-Call Argument Your Model Gets Wrong — and the Validator That Catches It

The Tool-Call Argument Your Model Gets Wrong — and the Validator That Catches It

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5 min read
Type Every LLM Response with Zod and 4 Classes of Bug Disappear

Type Every LLM Response with Zod and 4 Classes of Bug Disappear

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5 min read
JSON Mode vs Structured Output vs Zod Parsing: Which Guarantees Shape

JSON Mode vs Structured Output vs Zod Parsing: Which Guarantees Shape

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5 min read
Request validation with Zod in Express

Request validation with Zod in Express

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3 min read
Generate Zod schemas from any JSON API — no OpenAPI spec required

Generate Zod schemas from any JSON API — no OpenAPI spec required

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2 min read
Why Your Zod Validation Fails Before It Even Runs (And How to Fix It)

Why Your Zod Validation Fails Before It Even Runs (And How to Fix It)

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1 min read
Catching content rule violations at build time with Astro Content Collections + Zod

Catching content rule violations at build time with Astro Content Collections + Zod

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4 min read
Compile Zod (30x faster Zod validation)

Compile Zod (30x faster Zod validation)

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5 min read
Runtime Validation in TypeScript: Where Zod Ends and the Type System Begins

Runtime Validation in TypeScript: Where Zod Ends and the Type System Begins

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6 min read
Stop parsing GPT's JSON by hand: structured output with the Responses API and Zod

Stop parsing GPT's JSON by hand: structured output with the Responses API and Zod

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5 min read
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