fix: replace @redocly/openapi-core with @readme/openapi-parser for $ref resolution

[Copilot]

@redocly/openapi-core was throwing MissingPointerError for $ref pointers like #/definitions/enumNames.Type because redocly's bundler couldn't handle certain pointer tokens. Replaced it with @readme/openapi-parser (bundle()) which correctly resolves both local and external $refs.

🎯 Changes

• @kubb/oas – Removed @redocly/openapi-core dependency. parse() now calls @readme/openapi-parser's bundle() when given a file path or URL to resolve external $refs before handing off to OASNormalize. Inline YAML/JSON strings skip bundling and fall through directly. Bundling failures are non-fatal — a warning is logged and parsing continues without bundling.
• @kubb/plugin-oas – Updated plugin to align with the new parse() signature.
• Tests – Added petStoreExternalFileRef.yaml + category.yaml mocks; added utils.spec.ts cases for external file ref and remote URL ref resolution; updated snapshots affected by the changed ref handling.
• Changeset – Patch changeset added for @kubb/oas and @kubb/plugin-oas.

# petStoreExternalFileRef.yaml – now correctly resolves
components:
  schemas:
    Pet:
      properties:
        category:
          $ref: './category.yaml#/components/schemas/Category'
        category2:
          $ref: 'https://petstore3.swagger.io/api/v3/openapi.json#/components/schemas/Category'

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm run test.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is for the docs (no release).

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[changeset-bot]

🦋 Changeset detected

Latest commit: 669b07e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 20 packages

Name	Type
@kubb/oas	Patch
@kubb/plugin-oas	Patch
@kubb/cli	Patch
@kubb/plugin-client	Patch
@kubb/plugin-cypress	Patch
@kubb/plugin-faker	Patch
@kubb/plugin-mcp	Patch
@kubb/plugin-msw	Patch
@kubb/plugin-react-query	Patch
@kubb/plugin-redoc	Patch
@kubb/plugin-solid-query	Patch
@kubb/plugin-svelte-query	Patch
@kubb/plugin-swr	Patch
@kubb/plugin-ts	Patch
@kubb/plugin-vue-query	Patch
@kubb/plugin-zod	Patch
@kubb/agent	Patch
kubb	Patch
@kubb/core	Patch
@kubb/mcp	Patch

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Related Documentation

Checked 1 published document(s) in 1 knowledge base(s). No updates required.

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