
Sipan Petrosyan delivered an overhaul of OpenAPI discriminator handling in the hey-api/openapi-ts repository, focusing on broadening support for discriminator value types to include boolean, integer, and number in addition to string. He updated the parsing logic to accurately reflect property types, particularly addressing type checking for boolean discriminator properties in OpenAPI 3.1.x. For OpenAPI 2.0.x, he simplified the logic by defaulting to string types, reducing code complexity and maintenance overhead. Working primarily with TypeScript and leveraging skills in API development and schema validation, Sipan improved the reliability and maintainability of discriminator-based schemas across OpenAPI versions.
February 2026 — Key feature delivered: OpenAPI Discriminator Handling Overhaul in hey-api/openapi-ts. The work broadens discriminator value types to include boolean, integer, and number; fixes type checking for boolean discriminator properties in OpenAPI 3.1.x; and simplifies the OpenAPI 2.0.x discriminator logic by defaulting to string types. These changes improve parsing accuracy, cross-version compatibility, and reduce maintenance complexity, delivering higher reliability for downstream clients and tooling relying on OpenAPI discriminators.
February 2026 — Key feature delivered: OpenAPI Discriminator Handling Overhaul in hey-api/openapi-ts. The work broadens discriminator value types to include boolean, integer, and number; fixes type checking for boolean discriminator properties in OpenAPI 3.1.x; and simplifies the OpenAPI 2.0.x discriminator logic by defaulting to string types. These changes improve parsing accuracy, cross-version compatibility, and reduce maintenance complexity, delivering higher reliability for downstream clients and tooling relying on OpenAPI discriminators.

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