Apr 28th, 2026

Spotlight

A huge thank you to @SukkaW this release! They noticed generation was painfully slow on large OpenAPI specs, traced it to several algorithmic bottlenecks, and fixed them. The result is a 10x-30x performance gain on larger specs, with meaningful improvements on smaller specs as well.

We sent them $100 as a small token of appreciation.

Contribute →

---

@hey-api/openapi-ts 0.97.0

⚠️ Breaking

This release has 15 breaking changes. Please review the release notes carefully before upgrading.

Updates

• cli: print file count and generator speed (#3828)
• ⚠️ Breaking: client: resolve runtimeConfigPath relative to the output folder (#3770)

Changed runtimeConfigPath behavior

This was a known, long-standing issue confusing first-time users. Before, defining client runtimeConfigPath value would paste it verbatim to the generated output. This release changes the behavior to resolve relative to the current working directory the same way output path works.

• config: remove --apply flag from Biome post-processor commands (#3812)

Plugins

@hey-api/client-angular

• ⚠️ Breaking: request and response objects might be undefined (#3814)
• ⚠️ Breaking: respect throwOnError when request validation fails (#3814)

@hey-api/client-fetch

• ⚠️ Breaking: pass previous result to error interceptors (#3814)
• ⚠️ Breaking: request and response objects might be undefined (#3814)
• ⚠️ Breaking: respect throwOnError when request validation fails (#3814)

@hey-api/client-ky

• ⚠️ Breaking: pass previous result to error interceptors (#3814)
• ⚠️ Breaking: request and response objects might be undefined (#3814)
• ⚠️ Breaking: respect throwOnError when request validation fails (#3814)
• ⚠️ Breaking: respect ky instance defaults (#3806)

Changed Ky client behavior

The Ky client was updated to be more intuitive. Some Ky options now need to be passed via the kyOptions field and you need to pass undefined to unset an option.

@hey-api/client-next

• ⚠️ Breaking: request and response objects might be undefined (#3814)
• ⚠️ Breaking: pass previous result to error interceptors (#3814)
• ⚠️ Breaking: respect throwOnError when request validation fails (#3814)

@hey-api/client-ofetch

• ⚠️ Breaking: request and response objects might be undefined (#3814)
• ⚠️ Breaking: respect throwOnError when request validation fails (#3814)

@tanstack/angular-query-experimental

• add setQueryData option (#3824)

@tanstack/preact-query

• add useSetQueryData option (#3824)
• add setQueryData option (#3824)

@tanstack/react-query

• add useSetQueryData option (#3824)
• add setQueryData option (#3824)

@tanstack/solid-query

• add setQueryData option (#3824)

@tanstack/svelte-query

• add setQueryData option (#3824)

@tanstack/vue-query

• add setQueryData option (#3824)

zod

• fallback .discriminatedUnion to .union if members contain intersection (#3813)

---

@hey-api/codegen-core 0.8.1

Updates

• planner: speed up identifier conflict detector (#3823)
• symbol: speed up symbol registry cache (#3823)

---

@hey-api/shared 0.4.2

Updates

• graph: speed up graph builder (#3823)
• utils: speed up deep equality check (#3823)

---

Sponsors

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Contributors

Built with contributions from @inas-sirhan and @SukkaW.

View full changelog →

Apr 20th, 2026

@hey-api/openapi-ts 0.96.1

Updates

• config: warn on duplicated plugin configurations (#3753)
• output: surface postprocess errors (#3683)
• parser: re-add implicitly-filtered schemas in collectOperations (#3791)
• parser: avoid encoding url unsafe characters (#3782)

Plugins

@hey-api/client-angular

• narrow headers to Headers in ResolvedRequestOptions (#3757)

@hey-api/client-fetch

• narrow headers to Headers in ResolvedRequestOptions (#3757)

@hey-api/client-ky

• narrow headers to Headers in ResolvedRequestOptions (#3757)

@hey-api/client-next

• narrow headers to Headers in ResolvedRequestOptions (#3757)

@hey-api/client-ofetch

• narrow headers to Headers in ResolvedRequestOptions (#3757)

valibot

• add support for .variant() (#3780)

zod

• add support for .discriminatedUnion() (#3780)
• support generating z.input and z.output types (#3759)

---

@hey-api/json-schema-ref-parser 1.4.1

Updates

• parser: avoid encoding url unsafe characters (#3782)

---

@hey-api/shared 0.4.1

Updates

• output: surface postprocess errors (#3683)
• parser: avoid encoding url unsafe characters (#3782)
• parser: re-add implicitly-filtered schemas in collectOperations (#3791)
• config: warn on duplicated plugin configurations (#3753)

---

@hey-api/vite-plugin 0.3.1

Updates

• api: expose vite options (#3776)

---

Sponsors

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Best-in-class developer interfaces for your API. stainless.com

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Contributors

Built with contributions from @inas-sirhan and @sbs44.

View full changelog →

2026-04-13

@hey-api/openapi-ts 0.96.0

⚠️ Breaking

This release has 1 breaking change. Please review the release notes carefully before upgrading.

Updates

• ⚠️ Breaking: This release bumps the minimum required Node version to 22.13. (#3694)
• cli: improve error message on invalid input (#3679)
• parser: keep orphans when explicitly included in filters (#3714)
• parser: process enum metadata (#3727)

Plugins

@angular/common

• requests and resources broken default configuration (#3678)

@hey-api/client-angular

• simplify SSE line endings normalization (#3686)

@hey-api/client-axios

• simplify SSE line endings normalization (#3686)

@hey-api/client-fetch

• simplify SSE line endings normalization (#3686)

@hey-api/client-ky

• simplify SSE line endings normalization (#3686)

@hey-api/client-next

• simplify SSE line endings normalization (#3686)

@hey-api/client-nuxt

• simplify SSE line endings normalization (#3686)

@hey-api/client-ofetch

• simplify SSE line endings normalization (#3686)

@hey-api/transformers

• return value for primitive array entries (#3733)

---

@hey-api/codegen-core 0.8.0

⚠️ Breaking

This release has 1 breaking change. Please review the release notes carefully before upgrading.

Updates

• ⚠️ Breaking: This release bumps the minimum required Node version to 22.13. (#3694)

---

@hey-api/json-schema-ref-parser 1.4.0

⚠️ Breaking

This release has 1 breaking change. Please review the release notes carefully before upgrading.

Updates

• ⚠️ Breaking: This release bumps the minimum required Node version to 22.13. (#3694)
• internal: export errors (#3679)

---

@hey-api/shared 0.4.0

⚠️ Breaking

This release has 1 breaking change. Please review the release notes carefully before upgrading.

Updates

• ⚠️ Breaking: This release bumps the minimum required Node version to 22.13. (#3694)
• parser: keep orphans when explicitly included in filters (#3714)
• parser: process enum metadata (#3727)
• error: handle InputError (#3679)

---

@hey-api/spec-types 0.2.0

⚠️ Breaking

This release has 2 breaking changes. Please review the release notes carefully before upgrading.

Updates

• ⚠️ Breaking: remove OpenAPI types from JSON Schema documents (#3715)
• ⚠️ Breaking: rename OpenAPIExtensions to SpecExtensions (#3715)
• types: add WithSpecExtensions type (#3734)
• openapi: stricter 2.0 version type (#3715)
• types: use mutable arrays (#3715)

---

@hey-api/vite-plugin 0.3.0

⚠️ Breaking

This release has 1 breaking change. Please review the release notes carefully before upgrading.

Updates

• ⚠️ Breaking: This package is now ESM-only. (#3688)

---

Sponsors

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Contributors

Be the first to contribute to the next release! Browse open issues →

View full changelog →

@hey-api/shared@0.3.0

Minor Changes

• internal: remove plugin.getSymbol() function (#3671) (96f60ad) by @mrlubos

Removed plugin.getSymbol() function

This function has been removed. You can use plugin.querySymbol() instead. It accepts the same arguments and returns the same result.

Patch Changes

• plugins: add request validator helpers (#3671) (96f60ad) by @mrlubos

@hey-api/openapi-ts@0.95.0

Minor Changes

• plugin(valibot): remove request data schema (#3671) (96f60ad) by @mrlubos

Validator request schemas

Valibot plugin no longer exports composite request Data schemas. Instead, each layer is exported as a separate schema. If you're using validators with SDKs, you can preserve the composite schema with shouldExtract:

export default {
  input: "hey-api/backend", // sign up at app.heyapi.dev
  output: "src/client",
  plugins: [
    // ...other plugins
    {
      name: "sdk",
      validator: "valibot",
    },
    {
      name: "valibot",
      requests: {
        shouldExtract: true,
      },
    },
  ],
};

• internal: remove plugin.getSymbol() function (#3671) (96f60ad) by @mrlubos

Removed plugin.getSymbol() function

This function has been removed. You can use plugin.querySymbol() instead. It accepts the same arguments and returns the same result.

• plugin(zod): remove request data schema (#3671) (96f60ad) by @mrlubos

Validator request schemas

Zod plugin no longer exports composite request Data schemas. Instead, each layer is exported as a separate schema. If you're using validators with SDKs, you can preserve the composite schema with shouldExtract:

export default {
  input: "hey-api/backend", // sign up at app.heyapi.dev
  output: "src/client",
  plugins: [
    // ...other plugins
    {
      name: "sdk",
      validator: "zod",
    },
    {
      name: "zod",
      requests: {
        shouldExtract: true,
      },
    },
  ],
};

Patch Changes

• plugin(@hey-api/client-axios): fix: improve beforeRequest typing (#3660) (f3f887e) by @tomvdv

• plugin(zod): export request body, path, query, and headers schemas (#3671) (96f60ad) by @mrlubos

• plugin(@hey-api/client-ky): fix: improve beforeRequest typing (#3660) (d65b5c7) by @tomvdv

• plugin(@hey-api/client-next): fix: improve beforeRequest typing (#3660) (a4b13d4) by @tomvdv

• plugin(@hey-api/client-angular): fix: improve beforeRequest typing (#3660) (9ecc562) by @tomvdv

• plugin(orpc): fix: adjust input shape (#3671) (96f60ad) by @mrlubos

• plugin(@hey-api/client-fetch): fix: improve beforeRequest typing (#3660) (11be579) by @tomvdv

• plugin(valibot): export request body, path, query, and headers schemas (#3671) (96f60ad) by @mrlubos

• plugin(@hey-api/sdk): improve types for SSE events (#3466) (51ff11a) by @bilby91

Updated Dependencies:

• @hey-api/shared@0.3.0

@hey-api/openapi-ts@0.94.4

Patch Changes

• plugin(orpc): initial release (#3264) (8e1e62d) by @hyoban

@hey-api/shared@0.2.5

Patch Changes

• output: pass context as second argument in module.resolve() function (#3615) (b6a65d6) by @mrlubos

• parser: fix: self-referencing discriminator (#3601) (857eb19) by @pgraug

• output: add module option (#3616) (e4eea23) by @mrlubos

Updated Dependencies:

• @hey-api/codegen-core@0.7.4

@hey-api/openapi-ts@0.94.3

Patch Changes

• output: pass context as second argument in module.resolve() function (#3615) (b6a65d6) by @mrlubos

• plugin(@hey-api/client-nuxt): preserve AbortSignal, FormData, and ReadableStream in unwrapRefs (#3614) (129afa0) by @copilot-swe-agent

• parser: fix: self-referencing discriminator (#3601) (857eb19) by @pgraug

• output: add module option (#3616) (e4eea23) by @mrlubos

• plugin(@hey-api/transformers): expose plugin and $ in transformer function context (#3610) (18ccc81) by @mrlubos

Updated Dependencies:

• @hey-api/shared@0.2.5
• @hey-api/codegen-core@0.7.4

@hey-api/codegen-core@0.7.4

Patch Changes

• planner: language-aware declaration sharing check (#3606) (86c7115) by @mrlubos

@hey-api/types@0.1.4

Patch Changes

• internal: remove TypeScript from peer dependencies (#3566) (b5f1e4b) by @mrlubos