TypeScript SDKs now with Zod v4 Mini

Speakeasy has integrated support for Zod v4 mini into its TypeScript SDKs, offering a significant reduction in bundle size by approximately 10% while preserving runtime type safety. Zod addresses the lack of runtime type safety in TypeScript by validating API responses, preventing errors caused by type mismatches. The new Zod v4 mini variant improves tree-shaking capabilities through its standalone function API, reducing its footprint to about half the size of its predecessor, Zod v3, and enhancing performance with faster parsing capabilities. These internal updates allow SDK users to continue utilizing the familiar class-based interface without requiring changes on their part, benefiting from smaller bundles and faster runtime validation. The transition to Zod v4 mini is optional and can be enabled through the gen.yaml configuration file, although some edge cases, such as compatibility issues with MCP servers, may necessitate retaining Zod v3. This update aligns with Speakeasy's commitment to developing adaptable TypeScript SDKs for diverse environments, including Node.js servers, browser frontends, and mobile applications.

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