Zod

Zod Beyond Validation

• Jiyu Yan
• Engineering
• 17 Apr, 2026

Zod is usually introduced as a validation library. That is true, but the more useful idea is boundary definition. A TypeScript type only helps after data is already inside the pro

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Zod, OpenAPI, and Swagger for API Contracts

• Jiyu Yan
• Engineering
• 13 Jun, 2025

A public API is not just backend code. It is a product surface for another developer. That means the contract has to be readable. It also has to be enforced at runtime. Types in the app are useful, b

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