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- 1is-kit v1.16.0 adds discriminated union fallback support●is-kit v1.16.0 is out 🎉 Added discriminatedUnionWithFallback for handling future discriminant values at open boundaries
The TypeScript validation library is-kit has released version 1.16.0, introducing a discriminatedUnionWithFallback feature. It is aimed at handling unknown discriminant values at open boundaries such as APIs and webhooks: unrecognized variants are routed to an explicit fallback, while invalid known variants still fail, keeping unions finite and exhaustive checks intact.